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Gearbox-how to work out diff ratio???
Posted: Tue Oct 16, 2007 2:53 pm
by 85wrx
I am in the process of purchasing an 5 speed AWD gearbox. The guy doesn't know what the diff ratio would be for the rear end. Does anyone know of a way to tell whether it is a 3.9, 4.11 etc?? Any help would be appreciated.
Darryl
Posted: Tue Oct 16, 2007 3:47 pm
by Suby Wan Kenobi
Undo the drain bung and count the crown wheel teeth
Posted: Tue Oct 16, 2007 8:45 pm
by AlpineRaven
Do you know what year the box and what car has it came out from?
Plus gearbox number might help?
Cheers
AP
Posted: Sat Nov 10, 2007 2:58 pm
by 85wrx
Sorry it's taken so long. Just recieved the gearbox today.
The numbers on the sticker are TY752VB3AA. Is from a 94 WRX.
Any ideas as to the ratio I will need for a rear diff.
Thanks regards darryl
Posted: Sat Nov 10, 2007 3:57 pm
by PeeJay
My *guess* would be 3.9
Posted: Sat Nov 10, 2007 4:50 pm
by Point
a quick google reveals.......
JDM Impreza WRX MY93 TY752VB3AA 3.454 2.062 1.448 1.088 0.825 3.416 1.000
4.111
from
http://spda-online.ca/modules/tinyconte ... tc_28.html
Posted: Sat Nov 10, 2007 7:11 pm
by Point
if you read the link.....you will find the numbers are the gear ratios 1st thru 5th, reverse, transfer gear, then final drive. So from the numbers quoted....1.000 means there is no ratio change so the rear diff ratio will match the front. ie. 4.111
Posted: Sat Nov 10, 2007 10:31 pm
by Point
no...i searched the gearbox id number
year numbers can be a little misleading sometimes....from the plates on my brumby it could be a 89 or a 90....
Posted: Sun Nov 11, 2007 12:22 am
by D3V1L
my rex is not a 4.111:P....lol...
Posted: Sun Nov 11, 2007 10:18 am
by Point
what is the gearbox code?
Posted: Sun Nov 11, 2007 7:05 pm
by SUBYDAZZ
And hope to god whomever out that on the 'net got it right
