Transmission mount replacement how to?

[76k5blazerr]

I'm planning on replacing my upper and lower tranny mounts on Tuesday. Anybody who's done it before on a truck with the same drivetrain as my 76 (th350/203) mind giving me a little walk through on how to do it? I have access to a lift and a tranny jack.

 

[dremu]

Donno about upper-vs-lower. You get that from a parts book, or actually looking at your truck?

On my 350/203, there's a cast iron adapter with a foot that sticks down, and then a pair of two-piece mounts between that and the crossmember. (I happen to have poly mounts rather than rubber, but they come in both.)

The picture is a bit misleading as I'm running a Doubler, so the mounts you see (red/gold) are actually the rear ones for the doubler. The crossmember and mounts for the tranny foot (blue) are removed in this pic.

Anyway, in your case, assuming you have the same foot and crossmember, it should be simple. Undo the bolt through each tranny mount, jack to the '203 up a bit with a bottle jack, then R&R the mounts, rebolt, remove jack.

I don't think you'll even need to remove the crossmember, as was done for the pic above (you can see the driver's side leg for it on the right all covered in grease.)

If you have a different style mount or crossmember, your mileage may vary, as they say.

-- A

 

[TJ1978]

I ordered the rubber to replace the poly one I have. But which way does the under mount? And I can't seem find any info on the hardware needed to secure. I assume I can use my energy suspension metal for the top part but what about the underneath of the cross member?

Even lmc doesn't have the hardware they only have poly mounts. I suppose I can just swap out the top part that mount rest on to rubber and leave the poly underneath