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10-29-2019, 03:02 PM | #1 |
Senior Member
Join Date: May 2010
Location: Santee, California
Posts: 3,505
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Return to the Rear Float a Motor Thread
Hello, I have been working on the rear float a motor addition to my 39' transmission in my RPU. I have decided to stop for some advice. I was able to adapt the FAM rear cushion casting to the V8 clamshell by elongating the two side holes to match the 1/4" smaller measurement on the V8 clamshell. That has gone well. When I did so, the casting at the rear of the mount sits about 1/8" apove the crosmember. That takes me to the point where I have to raise the transmission to make room for the rubber cushion at the top of the FAM.
Thats where I lack the install instruction for how high do you jack the transmission for the cushion. I attempted to jack the assembly up. It did go up about 1/2" relatively easilly. At that point I was lifting the whole truck. I still have the stock rear motor mount, so I was concerned about cracking the flywheel housing. Should I loosen the 4 rear mount bolts, raise the trans a little more or should I make the cushion to fit the existing gap between the crosmember and FAM, then drop the transmission to a resting position on the crosmember? If I do the latter, the rear cushion will be thinner than photos of other installations, which I dont think matters, as long as there is some tension there. Your expert experience as well as any observations are welcomed. |
10-29-2019, 03:41 PM | #2 |
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Join Date: Feb 2013
Location: Coatesville, Pa
Posts: 719
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Re: Return to the Rear Float a Motor Thread
I have no experience in doing this but I would definitely loosen the rear motor mounts before jacking and then see how far the trans will go up without forcing.
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10-29-2019, 04:42 PM | #3 |
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Join Date: Jun 2015
Posts: 1,414
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Re: Return to the Rear Float a Motor Thread
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