hi i've just bought a 3.9 r180 dif, just wondering if anyone can tell me how to identify a dif that uses r160 shafts to a dif that uses r180 shafts? i've been told its an r180 from sti 7/8 car. thanks

 

Hi Dave, hows Steve?

 

........

 

from what I can remember, R180 is 180mm wide at the rear of the Diff and R160 is 160mm wide at the rear of the Diff.

Russell

 

cheers wuz ill have a look!

 

Jeez Russ you on drugs ?


R180 has a 180mm crown wheel, R160 has a 160mm crownwheel. However they are externally identifiable though difficult to describe.

Take a pic of the rear plate and post it up.

 

OK then John so it would be fair to say that the 180 diff has a larger body and rear cover than the 160?

Pretty sure I was told the above body size information from one of the techies @ Coordsport a couple of years ago. I had no reason to doubt them. Maybe I should have

I'll measure up a 160 and 180 diff when @ home and see what I get.

Russell

 

Distance between bolts on the back is the giveaway, but can't completely remember. I think that the distances correspond to the crownwheel sizes but not sure = drop david at API a line -he'll know

 

R180 diffs have 80mm centres between the bottom cover plate bolt heads and R160 diffs have a spacing of 60mm.

Cheers
Rob