hey im new to this and i was woundering i eventually this summer wanna put an SR20DET redtop engine in my 1990 240sx it now has a Ka24 SOHC i was woundering if i need a new transmission for the SR20 ur input would help thanx guys
If you bought your engine from a place like Autodream or JDMsource it would already come with a tranny and most everything else needed for the swap. Now to answer your question I do believe they are the same tranny anyway, you would just need the sr20 flywheel if you wanted to for some reason keep your SOHC transmission.
You would also need the SR bellhousing, AFAIK. But most shops will sell the engine with the tranny.
bump thnk u guys alot for ur input