s1 tranny question
 

can I put a y1 lsd into a s1 tranny. reason asking i have the s1 and can get the y1 lsd for a preety good price and not sure if it will work

Re: s1 tranny question
 

if the Y1 LSD has 10 ring rear bolts, yes......

Re: s1 tranny question
 

should work...the ring and pinion gears in a ys1 LS tranny are the same as the y1 b16 tranny (4.26 JDM b16 crx sir)....s1 is a 4.40 (JDM b16 xsi integra)

Re: s1 tranny question
 

so your saying 4.266 FD and 4.400 FD are the same.........

I beg to differ.........

Re: s1 tranny question
 

my bad i edited i may have the s1 and y1 backwards on the FDs but i think that's right....however i do believe all the b series cable tranny diffs and FDs are innerchangeable...i changed the final drive and diff in my b16 from a 4.26 to a 4.40....bolted up fine....

Re: s1 tranny question
 

Yes, the countershafts have the same number of teeth (15) for both the 4.266 and the 4.400 FD.

Re: s1 tranny question
 

same number of teeth, but different parts.

the teeth are cut at a slightly different angle and they won't mesh.

Same thing goes with the 70/16 4.25 and 71/16 4.437 D series FD's, the parts are different.

Re: s1 tranny question
 

How much different?

Re: s1 tranny question
 

enough the gears would be wiped out in 2-3 miles.........

Re: s1 tranny question
 

what is the final drive on a j1? same with shorter gears? all my spare s1 and a1 trannies are 4.40. guess i'll have to take my j1 apart to count the fd teeth