Hi,
I have a WRX STI RA 1995, and I need to know what ratio the rear diff is.
I am going to fit a gearbox with a 4 to1 ratio but I am not sure if the rear diff will be the same ratio.
Any info would be great.
Cheers,
Andy.

 

Most early RA's were 3.9:1 ratio. You'd need to tell me the TY number off the gearbox or chassis plate. 'Box is safer as it is going to be correct. There is a white label on the clutch housing close to the starter, it'll be TY752 Vb ???

Unfortunately my ratios list is at the office and l cannot confirm until Monday - will that do??

David APi Engines / APi Impreza

 

??? every early RA box i have had in bits has had a 4.11 diff in it.................

was always the normal "homologated" diff in grpN also, so would this not be the case??

alyn

 

The 'TY' number will tell us.

David APi

 

David API,
The transmission number is TY752VB3EA.
I have sent you a email with the info to your work to see if you have one for me.

Cheers,
Andy.

 

That is the one with the 3.9 ratio, as I suspected. Stockcar is correct; many others are 4.1, but that one is not.

I have replied to your email in longer format Andy.

Good Luck David APi Engines / APi Impreza

 

David,
You da man......