Re: was Re: SR-4/T-5 Yoke?

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: farna@xxxxxxx
" 
" That said, you should be able to make an adapter for the early bell to
" an SR4 or T5 (which mount the same). The early three speed and the
" SR4/T-5 have the same two upper bolt positions. The difference is the
" lower bolts. There is only 5-6" between upper and lower on the early
" bell, 8-10" on the SR4/T-5 (I'm recalling all this from memory, so
" don't think those are accurate numbers!). My thought was that the early
" three speed bearing retainer could be mounted to the SR4 by redrilling
" the SR4 case (SR4 retainer is much larger in diameter). Then a 3/8"
" aluminum (or 1/4" steel) adapter made. The adapter would have to be
" drilled for flush mount bolts for the lower holes on the early bell.
" Then it would extend down so that the lower bolt holes of the SR4/T-5
" could have bolts w/nuts through the plate. The AMC SR4/T-5 has the 6.5"
" deep bell, and the early bells are the same depth. To make up for the
" 1/4-3/8" difference a special pilot bushing that sticks out from the
" crank may need to be made, just make sure it doesn't interfere with the
" clutch disc. You will have to use the slightly smaller early flywheel,
" which will limit you to a 10" cluthc disc, IIRC, but that shouldn't be
" a problem. You can retain the original pressure plate, but will need a
" disc of the correct diameter with the SR4/T-5 spline. 

d'oh!  i should've remembered my own idea to adapt a '93-7 mustang 3.8
t5 to the early bell!  this makes things a little easier by having a
~2/3" longer input shaft than other ford or amc [7.85" vs 7.18"], thus
allowing thickness for an aluminum adapter plate.

if the t96/t14 and sr4/t4/t5 do share upper bolts that makes things
easier, but according to advance adapters they're completely different.
the old pattern is about 6.25" * 5.25"; the new is 7.92" between the
upper holes, 6.32" between the lower, and 6.27" top-to-bottom.

i was going to procede by milling a thick plate down leaving a lip on
one side that fits in the bellhousing retainer hole, then mill a divot
concentrically on the other side that takes the tranny retainer.  then
the plate can be slipped onto the bell and tranny and marked for holes,
and the only difficulty is not twisting the tranny relative to the
bell.

i think a stock t150 pilot bushing could be used, and a stock t150
clutch disk.

the flywheel has two patterns; the 9 1/8" and the larger that takes
both 10" and 10.5".  i can state from personal experience that a 10.5"
b&b pressure plate won't fit the bell; the only 10" b&b i could find
was the perfection hytest c1647 replacement for the early-'70s amc six
hd, but clutch adjustment is an issue.  there's barely enough travel
to fully disengage with zero freeplay, with the linkage in my american.

a diaphragm type pp like the perfection c1897 late-'70s hd six may be
better on travel; anyone know?  and maybe a 10.5" diaphragm pp would
be low enough profile to clear the bell.

none of this is a drop-in swap though, which is what i think the other
poster was looking for.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen

adh@xxxxxxxxxxxxxxxxx                       and think what none thought