1 stop diff info

[Gilly]

to prevent people asking same questions all the time. if you know more stuff add it up. definate stuff too, i know some celica diffs will fit but there are differences that i don't know of for sure so i haven't put them in.

S Series = ADM = no LSD available
T Series = JDM or T18 + others = plenty of LSD's available (KAAZ, Cusco, TRD etc)

S Series 8 bolts carrier to axle housing
T Series 10 bolts carrier to axle housing

S series = ADM AE86
T series = JDM AE86, T18

when fitting a T series diff you need a shorter rear tail shaft either out of a JDM 86 or a T18. the rear shaft for a t series is 20mm shorter than that of an s series

[attachment=7775:attachment]

ADM AE86 760mm, T18 740mm

Ke70's have a borgwarner diff different to S and T series. both S and T series will bolt in but an s or t series tailshaft must be used.

tailshaft and diff combo's (assuming you have fitted 4AC or 4AGE and using T50 box)

AE86 + T series = ADM or JDM front half + T18 or JDM rear half
KE70 + S series = ADM 86 or JDM 86 front half + ADM 86 rear half
KE70 + T series = same as AE86 with T series
AE71 + S series = same as KE70 with S series
AE71 + T sereis = same as AE86 with T series



found this while looking for info on my diff. TRD based and shows you how to rebuild a LSD if you are game.

http://www.my-acoustic.com/Car/rear_axle/L...LSD_Rebuilt.htm (http://www.my-acoustic.com/Car/rear_axle/LSD_Rebuilt/LSD_Rebuilt.htm)

[Gilly]

changed this to a diff info page, so post what you know for sure and prevent answering the same questions all the time.

[biggo]

lol, link my tech guide up http://www.ae86drivingclub.com.au/forums/emoticons/tongue.gif

its a bit shitty tho

[Monk]

You got got to add that when fitting a T series you need to get the proportioning valve.

however what I and a few others have done is taken the spring out of the standard ADM valve.
As shown here: http://www.my-acoustic.com/Car/brakes/rear..._efficiency.htm (http://www.my-acoustic.com/Car/brakes/rear_efficiency/rear_efficiency.htm)

However this conversion is only needed when changing from drum to disc brakes.
JDM T-series have 'Disc' Brakes
T-18 T-series have 'Drum' Brakes

Feel free to expand on this. (or correct me if im worng http://www.ae86drivingclub.com.au/forums/emoticons/biggrin.gif)

[crazy86]

regarding the "diff rebuild" link, T3 sell a diff rebuild/shim kit for stock LSD's, if your unlucky enough to have one.

[biggo]

link to old thread

http://www.ae86drivingclub.com.au/forum/in...?showtopic=3965 (http://www.ae86drivingclub.com.au/forum/index.php?showtopic=3965)

ill add my bit on lockers.

s series - dont bother

t series - most people just take the carrier out with the center and weld the 4 spider cogs to each other and onto the center housing. Mine was donr by pros who removed 2 spider gears and welded up the remaining ones onto the center.

Borgie - very simular to a t series only easier as u just take the backing plate off.

[Hen is a total nutcase]

RA40, Jap RT132, RA60 axles all fit T18 housing and centre, but need 10mm ground off the splined end. TA22 axles use a smaller wheel bearing and are too short to use also.

T18 T-series swaybar mounts (those that have them) are different from AE86 S-series swaybar mounts, but they can be easily modified to suit the AE86 swaybar bush and clamp.

T18 handbrake cables are about 10mm too long for the AE86. Either use AE86 cables, or put a 10mm spacer under the adjuster nut on your handbrake lever.

Be careful undoing the filler/drain plugs on these diffs, they are very easy to round off. Always use a socket/ring spanner. Also always check you can get the filler out before cracking the drain.


ill add my bit on lockers.
s series - dont bother[/b]
You can lock an S series fairly easily. Not as easy as a T series, but still works fine. There are just 4 small windows into the diff centre, you need to get plenty of weld in here and fuse the spider gears to each other and the casing.

Useless bit of info too: S series axle splines and T series axle splines (the smaller, zenki?? ones) are the same. In fact I think the only difference between the axles is the wheel bearings.

Hen

[70XIN]

Sorry to semi-hijack the thread

I bought a T18 diff, no swaybar mounts (from the lovely biggo) .. does this mean i fit a zenki or kouki LSD? http://www.ae86drivingclub.com.au/forums/emoticons/greenbounce.gif http://www.ae86drivingclub.com.au/dcimages/7/5/4/536981.jpg

[RobertoX]

zenki

[biggo]

for those retards still out there who sod on the 86 name.

zenki = early
Kouki = later

Anyone need anymore info. i know so much its not funny.

[holdenisshit]

yea i bought a dodgy lsd axle wink.gif, and im not sure if the lsd clutches are fucked.. is there a way to recond the lsd??

[holdenisshit]

if i open the lsd and check for splines wont i need to redo the backlash and etc?

[slydar]

take the lsd to ducan at top cog if youre in qld 0411372027. if youre somewhere else.. take it to a differant diff shop. regardless lsd mechanisms rarely wear out, they just need periodic ajusting, this service should only cost around $100.

thats for the servicing alone. if the shop has to remove/refit the lsd from the carrier/set the lash then ofcourse there will be additional charges, but it is well worth having the lash set by a profesional aswell. is this ajustment is not done correctly you will break or wear out your ring and pinnion. if its done right it may NEVER break.

[holdenisshit]

thats what i thought. the lashy give problems

[holdenisshit]

so basically i just get my prop shaft shortened 20mm??? and change hand brake cables. thats all for fitting the new axle?

[rthy]

does anyone know if the t18 drum wheel cylinders and shoes are the same as the adm 86?

[Hen is a total nutcase]

They look it at a glance, but just go to Repco and get the part numbers listed for each. I'd be willing to say they'll be the same.

Hen

[rthy]

yea i was ganna stop by supercheap on the way home tomorrow from work to check the part no.s

cheers

[Gilly]

96.5% sure they are the same cylinders and shoes.

KE70,AE71 are different (smaller)

[rthy]

i went down to supercheap and had a look at the book, they have different part number... o well

edit: anyone know if the kouki bearings are the same as the zenki? can i get them in australia?

[LordNafe]

Koukie wheel bearings? Theya re differnet to zenki. Can get them, but are quite expensive.

[rthy]

are s series bearings the same as t18 or the zanki t series?

[riceburner]

No there are not.

[stefan]

hi i need a t series diff but what diff did the ra40 celica come out with?

[Gilly]

RA40 has a t series. the mounts are slightly different though so they don't bolt straight in like a T18 t series does. also they are wider. the useable parts of an RA40 diff are the centre, brakes and axles, though the axles need to be shortened 5mm at the splined end otherwise they rub in the diff centre (found that out the hard way)

[stefan]

ah cheers heaps gilly bt ive managed to trade my s series recently serviced for a t18 diff swap for sawp!

ill change it ovet on sunday! then drop my locker into it!

[riceburner]

Be careful undoing the filler/drain plugs on these diffs, they are very easy to round off. Always use a socket/ring spanner.

Hen[/b]

Ring spanner wont fit on the drain, there is a large ring around it. To stop the nut being ripped off accidently no doubt. I found a hammer and coal chisel was most helpful.

[slydar]

slight correction..

zenki JDM axles have the same double row (extra wide) wheel bearing as kouki axles.

t18/celica use the narrower bearing.

[Beserker99]

Quick question regarding the diffs....

AE86 T and S series, are they both 1410mm wide?

Also, what are the widths of the other T series diffs?

RA23 - 1365mm?
RA28 - 1365mm?
RA40 - 1410mm?
RA60 - 1410mm?
TE27 - 1410mm?

Just need validation for these diff widths...if anyone knows if they are correct.

PS I took the measurements form the Toymods diff database. So if they can be confirmed, that would be very helpful for anyone finding one to mod into their AE86 (and know the diffence between diffs).

[Hen is a total nutcase]

I would say that RA60 diffs are not the same width as AE86 and TE72. I've used RA60 axles a number of times and they need 10mm ground off the end of each axle. So I'd guess they are 1430mm drum to drum.

I'd also hazard a guess that RA40 width = RA60 width.

Hen

[sprinters_r_mad]

i bought a t-18 diff from AJPS and while reading this it struck me that i might have a problem............. http://www.ae86drivingclub.com.au/forums/emoticons/ohmy.gif

can i fit the t-18 diff with the stock adm ae86 tailshaft??? http://www.ae86drivingclub.com.au/forums/emoticons/sad.gif http://www.ae86drivingclub.com.au/dcimages/7/5/4/536981.jpg

if not im screwed coz i dont have one http://www.ae86drivingclub.com.au/forums/emoticons/dry.gif http://www.ae86drivingclub.com.au/forums/emoticons/angry.gif

[Big T]

can i fit the t-18 diff with the stock adm ae86 tailshaft??? http://www.ae86drivingclub.com.au/forums/emoticons/sad.gif http://www.ae86drivingclub.com.au/dcimages/7/5/4/536981.jpg[/b]

Nope, you're screwed http://www.ae86drivingclub.com.au/forums/emoticons/tongue.gif Just find a t18 tailshaft and you'll be fine. You just need the rear section.

[sprinters_r_mad]

AWWWWWWWWW MAN!!!!!!!!!

dont suppose theres anyone here willing to sell one off???

hehe probs not but cheers anyway http://www.ae86drivingclub.com.au/forums/emoticons/2thumbs.gif

[rthy]

apparently there is a rare S series LSD, came out in Tarago's, not that you would want it though...

[Jonny Rochester]

...

[Jonny Rochester]

On American forums it was said that when fitting a LSD, you had to grind about 5 or 10mm off the end of your non-lsd axles to fit. This is only true when using the stock Toyota LSD from a AE86. These LSDs are not so good and we don't see many of them. Most of the second hand LSDs we import, and ones in complete axles are the better TRD ones, and I don't think the T-18 axles would need grinding.

[biggo]

more useless info from me

RA40/60 have bigger drums = easy brake upgrade.

At the moment im goin thru a phase of contemplating a w5x conversion. I was told that by useing a nightparts bellhousing u can use an RA40 front part of the tailshaft and 86 or T18 rear part. If, however you have an adaptor plate like me, im pretty sure a combination of 86/T18/RA60 parts of the tailshaft can be used. DO NOT quote me as yet as i havent been too indepth, only guesstimated that i need roughly 50mm less (adaptor plate + low height)

Also AL25 tercel swaybars fit t series fine, just watch out for it hitting the drain plug when welding the mounts on.

[d1_drift_kid]

hey

I have a t-series diff, and I got the new brake cables from toyota (all 3), now that ive put them in i think its too long, anyone know why? what did you guys do? i changed all 3 cables. should i just drill some holes and cable tie them to the chassis?

[Mr Freeky]

"RA40/60 have bigger drums = easy brake upgrade."

do you know if its just a straight bolt on. and would you need a bigger master cylinder and a brake bias thingy.

[orido]

EDIT dont worry about this question i used a ra40 diff instead.

[riojin]

whats the ratio of a s series diff centre? if changing diffs would the cables for the speedo and tacho have to be adjusted so they give out the right readings?

im planning on using an F series diff with a 3.9 centre.

[mikewestphoto]

S series is 3.9

can't adjust a cable, you can change the drive gear in the box to suit. There's a few combinations you can achieve with the gears.

Tacho comes from engine, has nothing to do with diff.

Random diff info I found out the other day. YR30 Tarago F-series axle tube flanges are bigger than T-series size which I believe is the same as E-series. Will confirm in a few days when I try to put corona disc brakes on the E-series.

MX13 F-series axle tube flange are the same as T-series.

[Hen is a total nutcase]

YR22 Tarago F sereis diff flanges are NOT the same as T series diff flanges. So Corona discs will not fit. From personal experience.

However as you say, the MX13 F series does share a diff flange with T series.

And YR20 E series has the same diff flange as T series.

[mikewestphoto]

Hen, would you happen know if YR20/21 E-series drum set up can be used on the YR22 F-series if using F-series backing plates?

Also do you know if the BW78 axle tube flange is the same as YR22 F-series? ie can you use R31 brakes on F-series?

[Hen is a total nutcase]

Ken, I'm not sure. Do you mean, YR22 diff, YR22 backing plates, YR20/21 drums? On those drum brakes the entire braking setup is attached to the backing plates, the only other part is the drum itself, so I don't really see the point to what you are suggesting.

As for matching the BW78, I also don't know, but give me the measurements of the BW flange and I can check. The YR22 has bolts set out in a rectangle, with a longer horizontal spacing than vertical spacing. Just like a drum T/S diff, but bigger.

Hen

[mikewestphoto]

Yep, I did mean YR22 backing plate(YR30 in my case) with everything else off YR20/21 braking mechanism. No real point in it except the F-series that didn't have brakes. After getting off my arse and test fitting it, it does fit. Probably of no use to anyone.

I was hoping you had BW78 measurements. meh, I'll eventually get around to it.

One thing I did notice with my F-series backing plates, the flange isn't a rectangle but a parallelogram. The lower bolt spacing is 80mm but the upper bolt spacing is 84mm. The smaller dimensions are 52mm. All dimension are from the centre of hole to centre.

[riojin]

I JUST FOUND THE KING OF ALL TOYOTA DIFF LINKS!!!!

<a href="http://www.norbie.net/ToyotaAxle/" target="_blank">http://www.norbie.net/ToyotaAxle/ (http://www.norbie.net/ToyotaAxle/)</a>

enjoy ladies :P

heres another one

http://www.geocities.com/MotorCity/Pit/997.../AxleCodes.html (http://www.geocities.com/MotorCity/Pit/9975/dataBySubject/AxleCodes.html)

[dustyae86]

<div class='quotetop'>QUOTE (riojin @ Nov 8 2007, 10:03 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=433692)</div>
I JUST FOUND THE KING OF ALL TOYOTA DIFF LINKS!!!!

<a href="http://www.norbie.net/ToyotaAxle/" target="_blank">http://www.norbie.net/ToyotaAxle/ (http://www.norbie.net/ToyotaAxle/)</a>

enjoy ladies :P

heres another one

http://www.geocities.com/MotorCity/Pit/997.../AxleCodes.html (http://www.geocities.com/MotorCity/Pit/9975/dataBySubject/AxleCodes.html)[/b]


diggin up an old thread but RA60 axles are billet correct?

[Hen is a total nutcase]

No they are not billet. They are a heat treated, machined, casting. Just like all other Toyota axles I have seen.

What are you getting at with that question?

Hen

[dustyae86]

<div class='quotetop'>QUOTE (Hen is a total nutcase @ Feb 1 2008, 11:17 AM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=478368)</div>
No they are not billet. They are a heat treated, machined, casting. Just like all other Toyota axles I have seen.

What are you getting at with that question?

Hen[/b]

just heard that they are very strong

[sprintdaddy]

<div class='quotetop'>QUOTE (Hen is a total nutcase @ Feb 1 2008, 10:17 AM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=478368)</div>
No they are not billet. They are a heat treated, machined, casting. Just like all other Toyota axles I have seen.

What are you getting at with that question?

Hen[/b]

bzzztt wrong most if not all axle are FORGED not CAST then heat-treated to different hardnesses depending what part of axle for example, the flange where the wheel bolts on is softer than the section of axle where the wheel bearing fits. This means you can weld the flange if you want to change stud patterns but you must let it cool slowly, where as if you weld the axle where the bearing is located or in the spline area the metal will crystallize and the axle will break in that area. I`m not bein a smartarse just sharing some knowlege, hope this helps boys :rolleyes: .

[sr_rolla]

ra60 axles are stronger as they have less steps down than the t18 axle and the thickest part is longer, ra60 diffs are 1415mm long, they do fit in a ke70 but are mounted slightly more rearward due to different mts and the top 4 link mts are either 15mms narrower or 15mm further apart, i forget which.

[eightsixboy]

What ratio is a t series from a t-18?

[shelldrake]

http://www.norbie.net/ToyotaAxle/

this link was posted half a dozen posts up the page
it contains the answer to your question

3.909:1

or:

# 41201-29406 3.308 final gear ratio
# 41201-29287 3.583 final gear ratio
# 41201-29227 3.727 final gear ratio
# 41201-29237 3.909 final gear ratio
# 41201-29197 4.100 final gear ratio
# 41201-29207 4.300 final gear ratio
# 41201-29626 4.556 final gear ratio
# 41201-29637 4.778 final gear ratio

[Hen is a total nutcase]

<div class='quotetop'>QUOTE (sr_rolla @ Mar 4 2008, 04:20 AM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=496296)</div>
ra60 axles are stronger as they have less steps down than the t18 axle and the thickest part is longer...[/b]
Quite possibly. Except that wont make any difference to them breaking. They always break at the end of the splines coming out of the diff centre. And since RA60 and T18 splines are the same then they will break equally easily.

[VBman]

<div class='quotetop'>QUOTE (shelldrake @ Mar 23 2008, 12:16 AM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=506123)</div>
http://www.norbie.net/ToyotaAxle/[/b]


Got some "HACKED" link when i clicked that.

[riojin]

hmm youre right. well he took down a harmless and very helpful page there. bastard.

what has to modified to fit a RA60 diff in an ae86?

[sr_rolla]

u may need an adjustable panard bar. other than that it will fit but its not the best fit, when the car is lowered the pinion angle is wrong, the diff sits to far back, the top mounts are 15mm further apart so its a bitch to get the top links in (unless u have rosejointed arms) and its a few mm's longer.

but, u get bigger brakes, i havent tried but i think u should be able to pick up the length difference by machining the step on the drum face, there easier to get than T18 diffs, they have the same swaybar mounts as a ke70 and i could b wrong here but i think the auto 1 has 4.1 ratios

this is the same between ra40 & ra60, can't be sure about the ratio tho

[Sprinterboy]

Zenki T-series axles are 23mm.

Kouki T-series are 24.5mm

Correct?

Anybody got pics to SHOW the difference? I'll take one of my Kouki Axle tomorrow night and post it here.

[eightsixboy]

I bought a t series from ajps a couple of months ago with a 4.1 centre and when i went to put in my axles i found that the rhs bearing would seize. I thought it might be because it had to be shave more but it had already been shaved. It turned out that the splines wern't long enough, i have to file a ridge were the plines start, it was fine after that but i have always wondered why, i mean people say you only have to shave 5mm or so of the top of the axle and nothing have been mentioned about the splines bottoming out. I replcaed the bearings on both axles to, and the lhs is fine, but if you try to put the lhs axle in the rhs its the same problem.

I would like to get to the bottom of this before i put my lsd and new gearing in, so i know everything is all good.

I was thinking that maybe the rhs axle is different, from maybe a ra60 or something? but they measured the same from bearing to start of the splines. so yeah has got me stumped.

Another thing is that the centre obviously didn't come from the diff, as one bolt is way longer than the others and the casing for the centre is for normal length bolts.

Any ideas guys?

[johnk]

ok, here is a dumb question.

what is required for me to change my current, standard, adm ae86 diff, to a jdm T series????

is it a straight swap????

once again i apologize for the dumb question.

[70XIN]

Tailshaft (T series), it's a slightly different length to the S series one

And the diff itself

That's it

[johnk]

so its basically a straight bolt in item. do both the different rear ends use the same mounting positions???

[johl]

F.A.Q

[johnk]

what is faq????

[rthy]

click on FAQ at the top of this page on the black bar and you shall see

[Group A]

I have an ADM AE86 with 4A-GE, T-50 & T-series diff.

My mechanic wants to know if the centre bearing carrier for ADM & JDM tailshafts are the same?

[anastasios]

ok well will t-18 handbrake cables fit properly into my 71 or will i be better off gettin 86 ones

[Konakid]

T 18 ones work fine.

[narchi]

i have a T series disc to disc diff. I'm wanting to put this into my adm 86. I know what i need but i wanna by a 2way lsd so i can do this all at the same time. The t series is out of my parts car and the previous owner said its a Zenki diff. I ask how did he know.

He said that only the zenki will fit into a adm car easily. Is this totally true. I just need to know coz i don't wanna buy the wrong 2way. Is there a easy way i can tell without having to take out the axels and measure the splines?

[Mr Fujiwara]

what do we do regarding Swaybar mounts, I'm just assuming I'm going to have to weld on some mounts to use my Whitline sway which I'm about to buy....i still would like to have a sway bar in the sprinter so yeah...

any quick ideas? or mock-ups for mounts that i can easily make etc. or just cut the ones off my S series and weld them back on the T series, this is what i was planing to do.

[Leigh]

<div class='quotetop'>QUOTE (Mr Fujiwara @ Jul 20 2008, 03:18 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=563810)</div>
what do we do regarding Swaybar mounts, I'm just assuming I'm going to have to weld on some mounts to use my Whitline sway which I'm about to buy....i still would like to have a sway bar in the sprinter so yeah...

any quick ideas? or mock-ups for mounts that i can easily make etc. or just cut the ones off my S series and weld them back on the T series, this is what i was planing to do.[/b]


Same Same although I've got the AJPS mounts and bush loops but how do you go about lining up the mounts for welding? do I just eye it up or is there any secrets to getting it righ ...couldn't find anything in the FAQ even though I figure this is a FAQ

Leigh

[LIL BLU MAN]

any easy way to check if ur T series is kouki or zenki?

[Intense]

24mm(Zenki) - 25.5mm (Kouki) approx

Measure the spline diameter and see which one

[sprintdaddy]

<div class='quotetop'>QUOTE (Leigh @ Aug 1 2008, 10:49 AM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=569775)</div>
Same Same although I've got the AJPS mounts and bush loops but how do you go about lining up the mounts for welding? do I just eye it up or is there any secrets to getting it righ ...couldn't find anything in the FAQ even though I figure this is a FAQ

Leigh[/b]

Try mounting the diff housing in the car, then mount your swaybar to the car with the bushes on the sway bar now move the bushes to the right position, sit your new mounts on the housing where they need to be and tack them their now take the housing back out and finish welding your mounts, unless you like welding near petrol tanks which doesn`t seem to be a very popular passtime.

[Mr Fujiwara]

yeah ive cut the mounts off the S series and i will be fitting them to the sway bar and just getting them in a good spot they sit flat, marking, removing and then welding....it was much easier to cut them off the S series than originally thought, there's only weld on 1 side of each side, which made it easy

[sprintdaddy]

You`ve done well matey now make sure you weld them good you don`t want something coming "adrift" while your halfway trhough a corner.
cheers Mick.

[Mr Fujiwara]

<div class='quotetop'>QUOTE (sprintdaddy @ Aug 4 2008, 11:26 AM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=570936)</div>
You`ve done well matey now make sure you weld them good you don`t want something coming "adrift" while your halfway trhough a corner.
cheers Mick.[/b]

only thing coming "a drift", is the car itself! haha

or as the policeman the other week said "YOU KIDS BEEN DRAG RACIN"...."umm...err...not quite"
"don't BE A SMART ASS"

[LIL BLU MAN]

just letting u guys know if ur in some T series trouble 76 corona diff centre which is also in early celicas fits Kouki JDM T series housing, tailshaft and axles good for a temp replacement or a locker but they run 3.9s

[Nic19]

has anyone done a full width r31 diff conversion into a *e7*??? any info please pm me

cheers
nic