How Do I Replace 6 with 8 Speed Transmision

[Neil112]

I have an 8 speed transmission laying around and would rather not spend money to rebuild the 6 speed. Is there any way to make the 8 speed work? If so what exactly needs to be done? 

[newdude]

Too much to bother.  Both aren't even wired the same TCM wise, etc.  TCM is external on the 8 speeds, internal on the 6 speeds.

 

Sell the 8, rebuild the 6.  

Edited March 30, 2023 by newdude

[CamGTP]

Not even worth the trouble.

[AdioSS]

If you are considering that swap, then I say sell both & just go straight to the 10-speed. Or maybe a stick shift?

[swathdiver]

On 3/28/2023 at 1:22 AM, Neil112 said:

I have an 8 speed transmission laying around and would rather not spend money to rebuild the 6 speed. Is there any way to make the 8 speed work? If so what exactly needs to be done? 

Neil, sell the 8-speed and use the funds to overhaul the 6-speed, WAY less headache that way.  Get a billet converter with improved internals.