sorry i cant help blair but i also have this problem... i would really like to know aswell!
personal situation: i replaced my speedo gear drive in the gearbox when i got the car as it wasn't working.
Car - 86.
motor - 4ag
use - Dori
problem - Odometer works, Trip-meter DOESN'T WORK
occurs/started when - Dropped new engine in (had gbox out as well)
personal situation - Do they use the same input on the dash? or do they take their readings from two different sensors? i.e. have i just not plugged something in properly? or is this some sort of heebe-jeebe thing happening lol.
Trip meter just stays on 0000 whilst the odometer appears to be working normally.
sorry i cant help blair but i also have this problem... i would really like to know aswell!
personal situation: i replaced my speedo gear drive in the gearbox when i got the car as it wasn't working.
It's probably just broken at the same time you changed the engine.
They are all driven off the speedo drive cable...
1983 AE86 ADM rust spec goodness track car build - end of the road
1984 AE86 Silver ADM mk2 daily build - SOLD
1984 AE86 ADM granny car daily now 4AGZE - SOLD
1983 AE86 ADM Engine Conversion Slut - SOLD
2002 IS200 6spd - new daily in progress
1986 AE86 JDM GT-Apex Levin Notchback ready to roll......
Odometer has now stopped aswel! FML
RESALE FTW though!!!