Tranny Search

[jdbubb at verizon.net (Dan Bubb)]

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

> From: "Chuck Blue" <sukchew@cox-internet.com>
> Sent: Monday, August 08, 2005 11:08 PM

>
> Well, The time has come to build a tranny for "Rose". I'm having trouble 
> with 5th gear so it's time to start a search for a rebuildable tranny.I 
> want to stay with the 3.89 final and the 0.71 5th.I believe that is 
> available in a FO from 79 or  FN FF FH FJ from 81 and later.
>  I think I am making enough power that something may break on a hard 
> launch. I plan on converting to the 100 mm flanges when the change takes 
> place. ( its hard even for a ole guy to be a light foot.).let me know what 
> you have at what price. I not just shopping I'm a buyer if you have what I 
> need.
>
> Chuck
> ole blue
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