S15 6 Speed Transmission for Dummies

[racinjayson]

Man, I wouldn't weld up an s15 diff, but it will work just fine. The only difference is the gearing. Your diff. now is probably a 4.08 or 3.90 where as the original s15 gearing is a 3.69 so your tach. at 65 will be about 300 rpms lower. Like I said ,though, I wouldn't weld it up, because it's already a helical style posi. which by many standards is the best type of posi. you can get. Yes, of course, not for you drifters, but time attack, autocross, and track days there's nothing better.

[Nilsson]

Originally Posted by racinjayson

Man, I wouldn't weld up an s15 diff, but it will work just fine. The only difference is the gearing. Your diff. now is probably a 4.08 or 3.90 where as the original s15 gearing is a 3.69 so your tach. at 65 will be about 300 rpms lower. Like I said ,though, I wouldn't weld it up, because it's already a helical style posi. which by many standards is the best type of posi. you can get. Yes, of course, not for you drifters, but time attack, autocross, and track days there's nothing better.

Damn, I hoped it would be the other way.. Need to get me a 6-speed tranny, always thought my gears are sooooo long if u know what i mean, ~85 topspeed at 2nd gear and ~115 in 3rd.
Got a good price at the s15 diff so might as well use it! thanks for the good answer!

/Nilsson