V8 tranny thoughts Options

[Brett W]

Why no just take a standard 915-930 tranny and flip it up side down? This should take the hassels out of flipping the ring gear, you would have to come up with pump and a shift linkage though?

[Mueller]

Brett,

Contact Ed Ducey (propicer), he is a partner or something like that for the West Coast built Ultima cars...

I copied this from the official Ultima website:

Which engine should I use in my Ultima?

The factory has designed the Ultima to accept the small block Chevrolet V8 from 300bhp to over 600bhp.
The factory does not recommend and cannot offer any support to customers fitting alternative engines.

Which gearbox do I use?

The Ultima has been designed to accept the Porsche G50 5/6 speed or the Getrag 6 speed in standard form. Apart from changing the breather location no other modifications are recommended.

How strong are the transaxles?

The Porsche transaxle is superbly engineered by Porsche and has an exceptional weight/strength ratio.
The Porsche transaxle fitted to an Ultima has been used successfully with engines up to 600bhp.

If you could get Ed or someone to take a few measurements of a chevy V8/G50 combo, you should be able to figure out real fast whether or not it'll fit or where you'd run into problems.

i have no idea if the box is upside down or not, the Ultima webiste does mention that the vents need to be modified on the G50 box, so I would be willing to bet that they run the box upside down. For your application and the amount of cutting/modifications you'd be doing, it should be no big deal at all if the trunk floor needs "tweaking" due to the larger and upside down transmission.