HuggyBear

i have a 90GXL with a bad tranny and im replacing it with a 88 T2 tranny. heres the planned setup:

N/A diff with a T2 differential flange replacing the current one. this should let me use the T2 driveshaft, which in turn poses no problem with the T2 tranny.

now from there since the tranny will be out im replacing the clutch disk/pressure plate/flywheel with aftermarket components for an 88T2 for compatability sake.

now with the counterweight i understand its based on the engine which one you should use. is that the be all end all for counterweights or will i need something else with my T2 setup.

basically, can i use a '90 counterweight or do i need an '88 or what? and if i recall i need the automatic counterweight regardless correct?

RX7BEAR

you need the counter weight from your auto. if your changing to a 5 speed if your just changing tranys from N/A to turbo tranny you need a flywheel that is a turbo from your year

HuggyBear

sorry i guess i forgot to mention im already driving a 5spd. when i mentioned the auto it was to say that i was aware i needed the counterweight from an automatic of the same year as my car. question centered around the T2 trannt, flywheel, clutch and if that changed the fact i need a '90 auto counterweight(cause my car is a '90 itself).

thanks

FPrep2ndGenRX7

Why are you changing to a TII tranny? It doesn't really provide an advantage and weighs #30 more. The flange your talking about changing might not work. The number of splines on it are different from the N/A to the TII rear. I might be wrong but you probably want to check that before you start. Somebody let me know if I'm wrong.

HuggyBear

yes if someone could please fill me in on that. although i talked with someone who is familiar with the process and he said it wouldt pose a problem.

the reason im doing it is because my tranny is broken, and i want something beefier.... also its only got 50k kilometers on it. to good a deal to pass up.

Rob500

The OD of the NA flywheel is not the same as the OD of the T2 flywheel. I'm sure you know that the stock flywheel and counter weight are one piece. So, if you are using the stock flywheel you need the flywheel to match the year of the motor in your car and the type of transmission.

Many places sell light weight flywheels that include a separate counter weight that is basically the counter weight from the appropriate automatic transmission model.

Just match the counter weight to the motor and the flywheel OD to the transmission.

Rob

HuggyBear

sorry what does OD mean?

i wont be using the stock flywheel i will be getting lightened steel one as well as a new clutch/pressure plate for the '88 T2. the engine will ofcourse be the same '90n/a. based on this will it be neccessary to use the automatic counterweight from a '90n/a? or are the '88 T2 components im going to use make it neccessary to use another years counterweigt?

i know the CW has to match the engine but will the '88 T2 components change what i need?

Rob500

You need the counter weight for the 90 na car and the light weight flyweel to fit the 88 T2 trans. Call Mazdatrix and tell them what you are doing. They'll be able to help you.

OD means outside diameter.

Rob

HuggyBear

thanks for the info rob that answers it for me.