Let's play 'name that diff'....

[MikeDE]

So I have an 87 Seta, and never even considered that a PO would've changed the diff. But upon reading a post saying that the 2.93 gives you about 2500rpm's @ 75mph, I realized after reading this that at that speed I am revving about 2900-3000rpm....i'm thinking it may be a 3.23/3.25, i'll look for a tag today when I leave work.....any ideas??

[E30SPDFRK]

Sounds like a 2.93 to me, my 3.25 is at about 2750 at 75ish; 70 at 2500.

[MikeDE]

i'll doublecheck the exact speed v. rpm tomorrow on the way to work with my GPS.....

[E30_fiend]

I too have an 87eS and I know for a fact I have a 2.93lsd. At 70 I'm at 2500rpms. and at 75 I'm at about 3000rpms

[e30trooper]

im at 4000 at 80 and i have a 3.91

[Aptyp]

it also has a LOT to do with how well your car is tuned...

[884door]

it also has a LOT to do with how well your car is tuned...

Umm no. That has nothing to do with it.

On stock sized tires a 2.93 puts you VERY close to 2500 rpm at 75mph in 5th gear on a manual trans.