Other/diffinfo
From AE86 Driving Club FAQ
ONE STOP TOYOTA DIFF INFO
Factory fitted Differentials for xE7x and AE86
KE70 Sedan, Wagon: Borg-Warner
AE71 Sedan, Wagon: Borg-Warner
KE70 Panel Van: S-series
AE71 Panel Van: S-series
TE72 Hatchback: T-series (ADM)
Australian Domestic Market (herein referred to as 'ADM') AE86 Sprinter: S-series
Japanese Domestic Market (herein referred to as 'JDM') AE86 Sprinter (Kouki): T-Series (Kouki)
Japanese Domestic Market (herein referred to as 'JDM') AE86 Sprinter (Zenki): T-Series (Zenki)
LSD Fitment
Borg-Warner: No LSD's Available
S-Series: No LSD's Available (although extremely rare factory ones are rumored)
T-Series (all versions): LSD's Available from the factory, Commonly Available aftermarket (KAAZ, Cusco, TRD etc)
E / F / G series: LSD's Available from the factory, some aftermarket LSD's available
Different versions of the 'T-Series'
JDM 'Kouki' (late model) T-Series:
Slightly thicker axles compared to Zenki / ADM t-series (1~1.5mm)
Larger bearings compared to Zenki / ADM t-series
Disc Brake only (reference required)
1410mm Width
Mounts will line up to any xE7x / AE86
JDM 'Zenki'(early model) T-Series
Slightly skinnier axles compared to Kouki T-series
Smaller bearings compared to Kouki T-series
Disc OR Drum brake (Disc and drum brake have slightly different housings)
1410mm Width
Mounts will line up to any xE7x / AE86
ADM TE72 T-Series
Axles / bearings / Housing same thickness as JDM zenki drum
Drum brake only
1410mm width
Mounts will line up to any xE7x / AE86
ADM TA22 (post 73), RA23, RA28
Axle thickness same as TE72 / JDM Zenki (however they are shorter)
Drum brake only
1365mm width
Mounts will not line up properly with xE7x / AE86 mounts
ADM RA40, RA60
Axles thickness / length (splines unconfirmed) as TE72 / JDM Zenki
Drum brake only
1410mm width
there is a minor difference in the measurements of the mounting points for the trailing arms and also the spring seats are slightly smaller also but factory xE7x, AE86 springs and trailing arms still bolt directly into this diff
Suitable Toyota Differentials to transplant into your AE71 / AE86
Moderate power:
Assuming you are running a T-40 / T-50 gearbox.
T series Differential from a JDM AE86 or ADM TE72, using the following tailshaft combo:
AE86 Front
TE72 Rear OR JDM AE86 Rear
This is because the 'nose' of the carrier on a T-series is 20mm longer than that of an S-series
Large power:
E / F / G series, using a custom tailshaft + mounts
Understanding Toyota Diff Codes / List of Toyota Differentials
Toyota diff codes are broken down into several parts. As an example we'll use this one:
T292
This is then broken down into several parts, like this
T/29/2
The 1st digit denote the size of the Crownwheel
The 2nd two digits denote the ratio of the differential
The final digit denotes the number of pinion gears and if the differential is a factory Limited Slip Differential (LSD)
The 'translator' for diff codes is as follows:
First digit:
A = 138mm
B = 145mm
C = 6.25"
D = 6.62"
E = 7.1"
F = 7.5"
G = 8"
H = 9"
J = 9.25"
K = 9.5"
L = 10.5"
M = 12.5"
N = 13.5"
P = 14"
Q = 12"
R = 162mm
S = 6.38"
T = 6.7"
U = 6"
V = 10.6"
W = 15.5"
X = 142mm
Y = 158mm
Z = 202mm
- no ring gear = FWD
Second, third digits:
01 = 3.30
02 = 3.36
03 = 3.545
04 = 3.556
05 = 3.70
06 = 3.889
07 = 3.90
08 = 4.111
09 = 4.222
10 = 4.375
11 = 4.444
12 = 4.625
13 = 4.79
14 = 4.875
15 = 5.125
16 = 5.286
17 = 5.60
18 = 5.714
19 = 5.833
20 = 6.167
21 = 6.667
22 = 6.78
23 = 6.833
24 = 7.64
25 = 4.556
26 = 5.571
27 = 3.364
28 = 4.30
29 = 4.10
30 = 3.727
31 = 3.909
32 = 6.591 or 4.807
33 = 7.503 or 5.583
34 = 6.781 or 4.786
35 = 7.636 or 5.60
36 = 4.778
37 = 3.583
38 = 3.417
39 = 3.154
40 = 5.375
41 = 3.308
42 = 6.500
43 = 3.550
44 = 3.214
45 = 3.533
46 = 2.928
47 = 3.944
48 = 3.356
49 = 3.729
50 = 3.400
51 = 3.736
52 = 3.722
53 = 3.250
54 = 3.941
55 = 3.333
56 = 2.821
57 = 4.058
58 = 3.238
59 = 3.234
60 = 3.519
61 = 2.724
62 = 2.892
63 = 2.655
64 = 4.312
65 = 3.837
66 = 3.071
67 = 3.526
68 = 3.095
69 = 4.176
70 = 5.857
71 = 2.962
72 = 3.949
73 = 4.285
Fourth digit:
2 = 2 pinions, not factory LSD
3 = 2 pinions, yes factory LSD
4 = 4 pinions, not factory LSD
5 = 4 pinions, yes factory LSD
Information sourced from: Toymods.org
Thanks to Johnny Rochester and Just Half Steppin' for their contributions
