SR20DET transmission replacements???

[Doriftogasm]

searched this topic...no good...so...my trans is about done...are there replacements i can turn too...the big deal i keep hearing is that you can use a KA24 Transmission and swap out the bell housing off the SR...is that true/false...because local mechanic i know swears that the KA trans/bell housing are one solid piece, which is insepperable...and if this is all possible, does anybody know the difference in gear ratio's between SR20 5speed - KA24 5speed...??? i've also heard that one of the RB transmissions could be a possible replacement...i dont remember if i was told a RB25 or RB20..well..

info would be much appreciated...thanks fellas

[DriftinFrEaK69]

SR trannys BLOW...damnit Josh my shit was grinding on my first to... i finally got one that is pretty solid... im still worried about it in the future tho... i am sure that one of the RB trannys will fit but like u i unno which on it is.

[FRpilot]

ppl have said that it works and i keep hearing bout it for the last 4-5 yrs.. but i never seen anyone actually do one.. so iono. maybe u can try it out and tell us!

[projectRDM]

CA18, KA24, RB20, SR20, VG30E, all same transmission, just different bellhousings. They'll all work.

[TheTicTac]

CA18, KA24, RB20, SR20, VG30E, all same transmission, just different bellhousings. They'll all work.

Aren't the gearing alittle different? I thought some gears were cut for NA and vice versas? I might be thinking of something else.

[stumpz]

gearings are different in each of them..i'm running the sohc ka tranny on my s13 sr

[Steeles]

ummm no. gearing in 1-4 exact same. fifth gear is a little differnt but you would never notice. all this is covered in search. (fifth gear in SR is like .739 and KA is .583 or something) they are all the same. find a KA swap the guts into the SR and go about your merry way

[Doriftogasm]

alrite dope...

[ihmeg]

there is a good write up on freshalloy forums on how to do the bellhousing swap, but they dont seem to be working for me but i know they are there, i was using it to do mine, just search forums for "bellhousing swap" you should find somthing

[blu808]

sr trannys suck

[sciamop]

sr trannys suck

On hard/fast/hi-rev shifts (usually 3rd to 4th), mine makes a sounds/feels like like a pencil getting snapped in half! Otherwise, it makes nice-nice with the engine.

Luckily, KA transmissions are plentiful and cheap...

Todd
93 Coupe

[AKADriver]

Your local mechanic is like... 20% right.

The bellhousing doesn't just unbolt like the bellhousing on an old school American transmission. The bellhousing is attached to the front half of the transmission case; what you're actually swapping is the bellhousing and the front half of the transmission case.

But it can be done, it has been done plenty of times, it's just more work.

KA gearing = SR20DET gearing for most years. 0.759:1 fifth gear and all. SR20DE and CA18DET has 0.838:1 fifth.

[Steeles]

AKADriver - are you SURE it was only the DE and the CA? I can remeber a couple people saying the DET had the differnet fifth also... i need to search...