higher rpms at 60

[falcon64]

i have two friends that have stock e30s just like my 325e, my speed ometer is slow and i wasnt sure how fast i was going so one of my friends stayed right beside me on the highway and he said we where doing 60mph, but i was turning 2000rpms and he was only turning 1600rpms, so i had my other friend stay right beside me at 60mph and once again i was turning 2000rpms, and he was only turning 1600rpms, i think thay have the same rearend gears mine is an 87 325e and theres is an 85 325e and an 86 325e they are all, 5 speeds.

what could be my problem, tell me what ur cars rpm is at 60mph

[wagonizzle]

You could do the math on it, but they probably have 2.79 rears vs. your 2.93. You could look at the diff tags...

[delfin]

Yeah differential difference

[falcon64]

well the clutch has begun to slip and i thought that may have been it was the 2.93. ratio new for 87 or an option or something somebody put in it