Boxster 5 speed transmission used with a3.8l engine

[PORSCHE928]

Can Any one tell me if it Is possíble to use the Stock 5 speed transmission with a 3.8l engine. The transmission is the original one that câme with the 97 boxster. The engine is a custom built 3.8l.

[Matt Monson]

As long as the 3.8 isn't a DFI engine. When they went DFI the bell housing bolt pattern changed.

Now longevity of that gearbox is going to be another thing. If you can find and afford a 6spd you'll be much better off.

[PORSCHE928]

Originally Posted by Matt Monson

As long as the 3.8 isn't a DFI engine. When they went DFI the bell housing bolt pattern changed.

Now longevity of that gearbox is going to be another thing. If you can find and afford a 6spd you'll be much better off.

Thanks for your reply.
Another question:
Will any 6 speed couple up with the 3.8; what modification should I be aware of.
Could I change the gear ratios and continue using the 5 speed?
What is the issue with the 5 speed longevity?

[BYprodriver]

Originally Posted by PORSCHE928

Thanks for your reply.
Another question:
Will any 6 speed couple up with the 3.8; what modification should I be aware of.
Could I change the gear ratios and continue using the 5 speed?
What is the issue with the 5 speed longevity?

5speed trans don't last long behind 3.4L or larger.

[Scnell Gelb]

Just a suggestion - before you fit the used 6 speed - fit new pinion bearings and check/replace the dog teeth on 2nd gear. Lots of info. on this issue here and other similar Forums.

[PORSCHE928]

n, thank you for your help and suggestions. Will discuss this matter seriously with my mechanic.

[mikefocke]

What other parts besides the transmission is involved in switching from a 5-speed to a 6-speed?

[mikefocke]

What other parts besides the transmission are involved in switching from a 5-speed to a 6-speed? Shifter? Half shafts?