T5 Tranny Swap
In hopes of getting more speed out of the 53 I considered the various
- Finding an enclosed driveshaft rearend from a similar year car that
would have a better gear ratio and swapping it into place.
- Ordering a new set of rear end gears from Patricks.
- Swapping out my tranny for a Borg Warner T-5 and going to an open
rear and new driveshaft.
My old 3 speed was getting worse and worse and since the previous owner
of my truck had already swapped a Mustang 2 clip under the front. I
was currently running a 5 front 6 back bolt pattern and carrying 2 spares
(just in case). So option 3 turned out to be my best bet, since I'd
be getting a new tranny with more gears, and a rear-end with a matching
bolt pattern (5 by 4 3/4 all the way around). I had read a lot on various
websites about the swap plus one of my buddies from the truck club (Rick)
had modified a couple of T5's for similar setups before and was willing
to give me a hand.
Next I began the search luckily it was a short one as another member
of the truck club had decided to go with an automatic in his truck and
was willing to part with a T5 he had pulled out of an 89 S-10 in a junk
yard he also was willing to throw in the shift lever, boot and driveshaft
he got from the same truck I believe I paid about $80 for all of it.
T5 Identification Tag List
That same day after we got the parts back to the garage Rick
and I started the modifications.
First we drilled out the 4 mounting holes to 1/2 inch originally
they were metric.
You'll also need to put bolts with lockwashers and nuts on
the bottom mounts as the old one's screwed into the old tranny
and now you just have holes.I went with grade 8 hardware on
Next we shortened the input shaft about 3/8th" and the
front bearing retainer about 1 1/2"with a cutoff wheel
in the die grinder. Also you'll want to put a little angle on
the end of the input shaft so that it looks the same as it did
before you cut it.
These are the measurements we used on
my conversion I recommend comparing your old transmission to
the T5 and making the cuts so that they match your particular
setup as I've heard people quote various measurements on their
|Rick was kind enough to modify the
shifter so it would work better in the old truck and not hit the
seat, he cut a notch in the front of the bend and bent it straight
up then filled it in with the welder and ground it down. I think
it turned out great and clears the seat and the dash just fine
with the stock S10 shifter.
The next step was to get a rearend. I knew I
had one at the farm that would work that I got with a previous
project it came out of an 84 Monte Carlo, it has a 5 Bolt by
4 3/4 bolt pattern which matches the M2 setup on the front of
my truck the ratio is around 3:73. So Rick and I headed out
to the farm to pick it up.
Now that we had all the parts gathered the next step was to
tear out the old rear, torque tube, and 3 speed.
The rear's in good shape so It was hauled to the farm for potential
use on a future project.
The truck looks kinda bare with these parts missing.
|I kept the flywheel and presure plate
I already had and bought a Disc that was slightly smaller but
has the correct spline for the t5. My truck had a 10 inch clutch
on it and I found a clutch at O'Reilly, Part number RCF4201
it's like 9 7/8 or something very close. Also If you have a
9 Inch Clutch you can use an RCF4190 I believe, It's just under
9 and has the correct splines. I have had no problem disengaging
the clutch with this setup, the center part of the disc that
hooks to the input shaft looks the same as the one off my old
3 speed (Just diff, Spine).
97/8" Disc for use with Stock 10" Clutch:
O'Reilly's part number RCF4201
Just under 9" disc for use with stock 9" Clutch:
O'Reilly's part number RCF4190
This document is a work in
progress when It's done I'll remove this message
thanks for looking I hope there is info you can use now.