Matty D

iTrader: (2)

I was given this diff when I bought my two door shell off . I was told it was an uprated unit!!!! I know its difficult one to answer but any info would be good.

Numbers on the casing are (85, KN51).

http://i228.photobucket.com/albums/e...tyrd/diff1.jpg
http://i228.photobucket.com/albums/e...tyrd/diff2.jpg

Thanks Matt.

harvey

iTrader: (48)

The casing could be the carrier for many different diffs.
From the photo I cannot tell but look into the LSD unit to see if there are a number of plates stacked together.
Typex a tooth on the crown wheel and count the teeth. Then repeat the exercise with the pinion to determine the diff ratio.

911

Looks like my Sti viscous to me.

Matty D

iTrader: (2)

Ok thanks, I'll strip the diff down and count the teeth. I bought the type r shell off John Stokes about 18 months ago but cant find his e-mail address anywhere. Basically ive been offered a sti 6 gearbox with the DCCD and wondered if the diff would be compatable.

Thanks Matt.

Jay m A

iTrader: (2)

Since you have the cover off do as Harvey suggests and tippex a tooth, then count how many times you have to spin the prop flange to get one full revolution of the crown wheel.

As you probably know, it needs to be a 3.9 rear to be compatible with a DCCD 6 speed

Matty D

iTrader: (2)

Just stripped the diff down.
Large gear has 39 teeth.
http://i228.photobucket.com/albums/e...rdiff00239.jpg

Small gear has 11 teeth.
http://i228.photobucket.com/albums/e...rdiff00311.jpg

Thanks Matt.

Mark A

iTrader: (1)

3.54 diff then, but can't place the type or the car its comes from

Mark A

harvey

iTrader: (48)

The 3.545 rear diff is fitted to uk cars with a 1.1:1 drop gear/centre viscuous diff.

Matty D

iTrader: (2)

Ok guys, thanks for your help.
Guess the search for a compatable diff continues.

STi_v4_Wagon

Just to let you know thats not a viscous lsd, but actually a mechanical lsd, clutch type I'm pretty sure.

harvey

iTrader: (48)

[From the photo I cannot tell but look into the LSD unit to see if there are a number of plates stacked together.]

Remember that the centre viscuos diff is the section bolted on to the rear of your gearbox.

911

Might help, this sis a visous rear diff from my Sti V3:

Mark A

iTrader: (1)

Check my thread for Diff pictures

Mark A