Discussion Starter · #21 ·
The cam is mild but I do not know the specs. 5th is very usable, 6th ok above 60. I started out with a 3.9 catera diff (blew it up) and installed the 3.07 v8 diff. I would recommend a 3.5-3.7 ratio. I have also been trying to find out if GTO guts fit in the BTR units. fredI presume that the cam you are running is pretty mild, do you know the specs?
Also how usable the 0.50 6th gear with the 3.07 Omega V8 diff?
Since I'm going to be using a T56 as well, I'm looking into a numerically higher gear for the diff.
I read on the Australien Holden forums that around 2001 the Holden BTR diff internals were changed
when they got bought out by Dana (BTR was Borg Warner's Australian subsidiary). So apparantly
the later internals from the GTO will not work; so I'll have to order the older gears from Australia.
I have not been able to confirm yet if our Omega diffs are of the older style but I beleive they are
becuase the newer ones do not have BTR Automotive cast into them.