Having R&R'd the transmission more times than I can recall, I'd suggest one
GMC modification to make the process simpler: The upper left (driver's
side) bell housing bolt is a real "booger" to R&R. Manny can do it
"instantly" with a 3/8" air ratchet, but I've spent as much time with that
one bolt as on the rest of the transmission removal/installation. To
eliminate that problem, I how have a 1-1/2" hole in the cockpit step riser
in line with that bolt. The carpet and a small aluminum cover usually seal
that hole. To R&R the hidden bolt, I reveal the hole, then use a 9/16"
socket on a 6" extension. The bolt comes out and goes in (usually after
all the others are in place) almost instantaneously.
Biggest problem is locating the hole. I had the transmission out when I
"built" mine, so I drilled through the riser with a long bit through the
bell housing hole. I won't give out the location dimensions because the
reference locations are too concealed/variable to be reliable.
Oh yeah: I usually pull the transmission and final drive together. My
lifting device doesn't much care whether they're together or not. I
suspend the transmission with a hoist mounted on the GMC manual illustrated
gantry. Manny has a much smaller, simpler one which only services the
transmission. Here it is, courtesy of Emery Stora:
http://www.gmcmhphotos.com/photos/g5215-transmission-lift-structure.html
Ken H.
On Sat, Nov 28, 2020 at 5:59 AM Ken Burton via Gmclist <
> I have pulled my trans 3 times. Once on a hoist with the final drive
> attached. Once on the floor without the final, and once on the same floor
> that I
> got my daughter and her then current boyfriend to do it while I
> supervised. The last time she dropped the trans and then dropped the final
> drive
> separately because I wanted to also work on it.
>
> I like just dropping the trans by itself. It took 1.5 hours to drop it.
> It was an easy job with the fender liners removed. It took two of us about
> 2.5 hours to install the repaired one. It took the longest when I
> supervised two mechanically experienced people that knew nothing about a
> GMC. That
> added 1/2 to 1 hour to both the removal and replacement.
>
> My daughter volunteered to do it again if ever necessary but it really
> takes two people to install it. Originally she and I were suppose to do it
> until she enlisted her boy friend. I saw Manny do it once by himself in a
> rally parking spot. I know of one that was changed by two people on a
> paved shoulder along side of the road. I have always just used my floor
> jack to remove and drop it and reinstall them.
>
> As far as the torque converter goes on reinstallation just take about 3
> feet of safety wire or bailing wire and run it across the face of the torque
> converter. Then tie it off to the trans (bell housing) mounting holes.
> Install the trans and leave about 1/8 inch space to the engine. Cut the
> ends
> and pull the wire(s) out and tighten the mounting bolts. I run two wires
> across it.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
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