Rossyboy99

guys need quick help, about to buy a 98 uk wagon turbo, its got a noisey rear diff, what would the damage be garage price wise for changing it? is it a tough job?

also what models can i take a diff off to use as a replacement?

mike h

iTrader: (10)

Not a difficult job but the diff is a bit heavy. Changed mine in 2 hours. You need to check the code on the gearbox to determine the final drive ratio.

joz8968

iTrader: (13)

Hi again mike lol

Also, doesn't the actual rear diff have its FD ratio stamped on its casing in fraction form e.g. in the case of the 4.111:1 diff, "37/9"? Or is this not the case?

STI_Baly

iTrader: (23)

Usually the fraction can be found on the main crown wheel within the diff.

Baly

mike h

iTrader: (10)

Stalker

There are numbers on there, thats if you can be bothered to remove the cover plate to have a look. Another way is to disconnect the prop and remove the drain plug. Mark a tooth with a paintpen/tipex, turn the diff and count the teeth.

STI_Baly

iTrader: (23)

Instructions for what mike;s referring to above

1
Remove oil and end cover exposing the crown wheel.
2
Mark with a white marker pen/tipex a tooth on the crown wheel and on the case closest to that tooth thus giving you a start reference point.
3
Mark similarly the prop shaft flange and case for a start reference point.
4
Turn the prop flange counting the complete 360 degree turns to rotate the crown wheel ONE complete turn and the tipex marks to re-align.
5
You will turn the prop flange about 3 complete turns then a fraction of a turn.
Expect about 3.9 turns (you have to estimate this) for one rotation of the crown wheel.

The above extract courtsey of '911' on another thread.

Baly

mike h

iTrader: (10)

Final drive ratio from transmission code

Transmission chart