Nuggets! (was: Tranny Search &3A rebuild)

[area53 at validpath.com (Jeff Toomasson)]

Dan - you're on fire this morning!  :)

These are two of the most informative+succinct posts anyone's put out in quite 
some time. Everyone should stash these two nuggets away in their archives 
(including me even though I know 99% of this stuff - it's that good...)

Good job dude - JT

> I need to throw in my .02 here.
> The 3.89 FD is weaker than the 3.94 and 3.67. The tooth count on the ring 
> and pinion of the 3.89 is 93. It's 84 for the 3.94 and 3.67. Lower tooth 
> count, bigger stronger teeth. Better suited for turbo power!
> All the other ratios found in the trannies you mention are very good from 
> the perspective of tooth count and strength. (unless you stumble across a 
> .76 5th which has the teeniest tinyest little gear teeth you've ever seen!)
> Also, note that 100mm flanges will not fit in the early  tranny cases like 
> the codes you've mentioned. These early cases have a smaller seal and the 
> later 90-100mm flanges, with their larger diameter seal surface plus some 
> other dimensional differences, will not fit.
> If it was up to me to decide what tranny to build for your awesome turbo
> car  I'd use a later style case, 1st thru 5th (3.45, 1.94, 1.29, .91, .71)
> out of  an FF/FN and either a 3.94 or 3.67 final drive with 100mm flanges.
> Course I'd also want to throw in a Peloquin or Quaife. Phantom Grip at the 
> least!
> Dan