auto guys, diff question.

[London07]

i know a guy selling a 4.27 lsd with 40% lock up and a 2.5str torque converter, he had it on a 93 325 and said highway rpm's and gas mileage were fine. how would this work out on an auto M3, compared to a 3.91 lsd?

[giterdone]

i know a guy selling a 4.27 lsd with 40% lock up and a 2.5str torque converter, he had it on a 93 325 and said highway rpm's and gas mileage were fine. how would this work out on an auto M3, compared to a 3.91 lsd?

a bit more pull, a bit less top end, and probably a bit less gas mileage on the highway.

[London07]

how would the RPM's be? i dont want to be at like 4000 rpm while cruising at 80mph.

[giterdone]

how would the RPM's be? i dont want to be at like 4000 rpm while cruising at 80mph.

i'm not real sure. Probably amazingly high. PM volfinator. He has a 3.91. Ask him how his rpms are on the highway, then raise that number up a bit. :)

[kpipalldaway2]

that would be wayyy to much, plus the lsd on it is broke so your probably going to have a hard time keeping traction. i wouldnt go anything higher then a 3.91 lsd. which i am swapping his week!

[London07]

thats kind of what i figured, i guess i'll stick with the 3.91 or lower. thanks guys.

[giterdone]

thats kind of what i figured, i guess i'll stick with the 3.91 or lower. thanks guys.

if most of your driving is city driving though, it might be beneficial. However if you spend any length of time on the interstate, it could be a problem.

[London07]

im in traffic in the morning going to work. but thats about it.