Will a 90 TII tranny bolt right up to a 1987 TII motor?

Do I have to change out the flywheel or counterweights?

 

Yes
No

 

Uh....Mr wordy can you elaborate. Yes it will bolt right up? and no I do not have to change counterweight on engine to match tranny?

 

Sorry, I wasn't being smart...Yes it will bolt right up. Flywheel/clutch fine.

 

Cool thanks for your help. I didn't think you were being a smart *** I just wanted to be sure. I would hate to slap this thing together and drop it in my car, and then find out after the fact that I should have changed the counterweight.

Can anyone answer this then, why does a flywheel and counter weight have to be changed out for certain combinations of trannys and engines?


David

 

A quote from the past:
The stock flywheels have the counterweight built into them. If you are going to put a t2 motor in the car you will need one of two things. Either the stock t2 flywheel for the year of the motor OR a lightweight flywheel and the automatic counter weight that matches the year of the motor. The flywheel has to match the motor.

 

his question has nothing to do with the motor. A tII tranny will bolt up to a TII motor. I dont think the year matters.

 

This part I get. I am just concerned that an 87 flywheel and counterweight, will have some adverse effect, when hooked to an 90 TII tranny.

 

bump,

I am still looking for an answer to this question.

QUOTE
"Can anyone answer this. Why does a flywheel and counter weight have to be changed out for certain combinations of trannys and engines?"

QUOTE

"Will a 90 TII tranny bolt right up to a 1987 TII motor?"

"Do I have to change out the flywheel or counterweights on the 87 motor to match the 90 TII tranny?"

 

The cross member between the S4 and S5 tranny is different.. You May run into problems there..


-Zach

 

Can anyone answer this. Why does a flywheel and counter weight have to be changed out for certain combinations of trannys and engines?"

If you were to put a 87TII engine into you 87NA but sill run the NA drivetrain, you would need to use the 87 flwheel. If you were to use a 89TII engine in the above example you would need to use the 89 NA flywheel. You need to run the crossmember from the 89 tranny in you 87TII.

This part I get. I am just concerned that an 87 flywheel and counterweight, will have some adverse effect, when hooked to an 90 TII tranny.

The engine is balanced as an assembly from the flywheel to the front counterweight, so the tranny would not affect anything.

 

rule nr. 1

Counterweight must match engine

S4 engine need flywheel from S4 regardless its NA or TII
(both S4 flywheels (NA/TII)will work on S4 engine)

S5 engine need flywheel from S5 regardless its NA or TII
(both S5 flywheels (NA/TII) will work on S5 engine)

rule nr. 2

Flywheel must match transmission

any turbo motor will work on NA transmission as long as u will use NA flywheel/clutch

any NA motor will work on TII transmission as long as u will use TII transmission

 

It does matter because the rotors are a different weight, so wouldnt that effect it?