tmtraylor

I'm guessing this crowd has done this job more than the normal C5-Tech community.

I have my torque tube disassembled and ready to install the bearing and guibo kit from RPM. Is there any need to service the Transmission input shaft bushing that sits inside the prop-shaft yoke? (pic #1) The rubber looks ok to me. There is an organge-ish color grease in there...that ok? The input shaft on the actual transmission looks good with no scaring or gouging.

How does the bearing surface look in pic #2? The discoloration at the bearing position is "smooth". You can't feel any ridges or valleys in those area. The rear-most bearing had a crunchy sound when you rotate it. The front-most "rear" bearing rolled smooth.

The front of the shaft (clutch side) bearing was very "stiff" compared to the rear one. No crunchy sound but did not spin freely.

Car is stock as far as the drivetrain goes.

Advice?

Socko

Mine looked simmilar, just used a 3m scouring pad and it cleaned right up. It was a fancy pad of some type, my buddy had at his machine shop, was like tan or grey, but felt more or less like one of those green pads to me. Took 10 seconds and the bores were clean.

Bearing still had to be pushed on, it didnt change the clearance or diameter i don't think, and all is fine.

tmtraylor

That's reassuring, thanks! Did you bother with the bushing that lives inside the yoke? I haven't found any mention of that in the other "torque tube" posts. GM is very very proud of that piece and the manual says it will be damaged if you remove/press it out. Since my transmission input shaft looks good, I'm thinking all is well with that bushing and he gets to keep his job. Thanks again!

Socko

Yeah i just left it in there as mine looked ok. I did cover up everything while mine sat for a few days to not get dust or doghair in the grease in there. Thats all I did with it though.

JerryTX

If you are in the torque tube because of Guibo failure, replace all the guibo bolts, reuse none.

tmtraylor

Thanks, I have to take dog hair precautions as well !

Thanks JerryTx...I'm in there because the shaft did not spin freely when I examined while the drive-train is out (having to replace a weeping slave cylinder hydraulic line). I took the Torque Tube apart and two of the bearings had issues. The guibos look brand new, no cracks and the rubber is "supple". Replacing them and the bolts since I'm there and don't want to return anytime soon!