WannaSeeMyWankel

My question: Are automatic motors and 5 speed motors the same with the exception of swapping the flywheel/flexplate?

I am assuming that it is possible to interchange the two transmissions, but I heard somewhere (dont remember where) that the rear plate of the motor is different...

Thanks for the help guys...

gergrx7

yes it is the same motor. the rear end is a 3.90:1 instead of a 4.10:1 ratio. yes it is possible to change a auto to manuel like here https://www.rx7club.com/showthread.p...hreadid=201102

rear plate? the counter weight? yes it is different from auto to manuel, you will need to manuel one unless you go with an lightweight flywheel.

WannaSeeMyWankel

Well, I have kind of a strange dilemma. My car is an 88 SE auto. I have a turbo motor, just the motor (ecu and everything like that included too). I dont want to go through all the crap trying to find a manual, swap transmissions and gauge clusters and peadals and shifters and all that.....would a S4 TII motor bolt up to my S4 automatic transmission with the swap of the flygheel/flexplate and counterweight?

BRIDGEP0RTED

yes but then you would have to go through all the crap to get your car home when the auto breaks. its not a good thing to have a auto 7 trust me. get a tII trans unless you want to make under 250 hp then go with a n/a


but yea a auto would bolt up to a turbo motor

WannaSeeMyWankel

Im not looking to build an all out race car, i want to have the looks of the beautiful 2nd gen rx7, the power of the turbo 2 rotary motor, and the convienence of the automatic transmission......i have my supercharged 3.8L fiero for racin......

WannaSeeMyWankel

im only expecting to make maybe 200 horses anyways

flamin-roids

You might have an issue with engine balance however. The motor was factory balanced for a auto flywheel. Your best option is to go for a light flywheel because a TII manual flywheel is a hell of a lot heavier than a auto flywheel. At least from my experience.

WannaSeeMyWankel

But if i change the flywheel/flexplate AND the counterweights i should be good rite?.....maybe i should leave the counter weight and just do the flywheel, that will keep the engine balanced right? but would it work is the big question?

flamin-roids

Here why don't you wait for a few weeks because I'm doing the same thing and I can guide you through it after I do mine. I think thats what I have to do also. I'm keeping the counter wieght and bolting a light steel flywheel.

WannaSeeMyWankel

well yea i dont think im gonna get around to this till prob like july.....no money...

WannaSeeMyWankel

lemme kno how it goes

nonameo

you need to put a pilot bearing in the E-shaft.

WannaSeeMyWankel

what do you mean nonameo? how would i do that?

RoninAutoBoX

The crappy Jatco transmissions can barely take an N/A's power and torque. The T2 engine will absolutely destroy that transmission in a second.