quick question on bellhousing interchange (rb20)

[godzilla_753]

Hi,
I recently bought a front clip, came with a neo motor attatched to what looks to be a rb20det transmission (kinda got screwed i guess ) the stock 5 speed drive shaft bolts up fine. Ive been reading around and looks like the rb20 box isnt near as strong as the rb25/300zx box.

My main concern is, when the time comes, will i be able to reuse the rb20 bell housing to use a 300zx box? Or will i have to buy a rb25 bellhousing.

I know that the KA tran bolts up to the engine fine, but I am hoping that where the difference lies in the KA and rb20 trans is the bolt pattern at the back where the gear box is.

can anyone confirm this? Can a rb20 bell housing be used with a 300zx gear box?

thanks!

[ST240]

No. You can use the bellhousing from a 25 or 26 transmission only. 26 trannys are usually dime a dozen. I suggest you go that route...

[Carl H]

sounds like you got a DE trans, which kinda sucks but they will hold reasonable power.
rocking out an rb20det trans behind my rb30 and its still together amazingly enough.

[ST240]

rocking out an rb20det trans behind my rb30 and its still together amazingly enough.

Lets race to see who can break theirs first. I'm taking mine to the track tomorrow .

[RustspecS13]

So you have or know were a spare trans is right? It might not break the first time but......me and my friends have broken a KA transmission with a bolt on SOHC KA. Just one out of the 9-10 240's we have all owned but still an na ka...

~Alex

[Carl H]

that is a race i will more than willingly let you win, my friend.

rocking out an rb20det trans behind my rb30 and its still together amazingly enough.

Lets race to see who can break theirs first. I'm taking mine to the track tomorrow .

[ST240]

:/ Yeah no kidding. I think I'm gonna make swapping the Z32 transmission a winter project, regardless.

[bradley66]

I have a ka24de trans on my rd20, 1st is stupid short, 2nd is so so, after that its not to bad but I have an m45 rear(3.68 I think) I lost some GET UP but I gained some more GO, I would like to see just how fast an S13 can really go, 166 confirmed right now, got the ticket(s), court fees, community service and attorney fees to prove it unfortunately.