Bill Ball

Dwayne: I'm happy to webhost any of your write-ups, as I have always done to date. Just send me the CD when it is ready.

blown 87

100% correct.

There are folks that have made a lot of money doing technical writing to a level that does not come close to what Dwayne does.

J.B. Woods comes to mind, as does my best friend Jack Mitchell.

Chilton aint got crap on our Dwayne.

Dwayne

EXCELLENT! I will prepare a DVD with the TT and TC bearing write up, the 1987 Bumper Cover write up, a new write up I'm working on right now for repairing the A/C compressor relay resident on the HVAC control head PC board, and an update to the HVAC trouble shooting and repair to address the vacuum diaphragm at the foot well.

THANKS for your help and support, Bill!

THANKS for the generous compliment, Greg! It has been a pleasure for me and I am glad these write ups are useful.

Rob Edwards

Perhaps there's a better thread for this, but I figured I'd put it here. I was out pressure washing a torque tube, just for the hell of it. It occurred to me I could spin it up a good bit with the water pressure. Check out the vibration when the whole thing starts rattling across the driveway... Definitely a bad front bearing, which is ok 'cause it's gonna get Constantined...

Turn up the sound:

Tony

Interesting. Get one of those little RC engine tachometers and see what it was turning at?
I think the fact that its not anchored at either end makes a difference also.

Do the same thing when you get the replacement.

Black Sea RD

Interesting way to get some RPMs into the assembly.

But please don't do this with the Super Bearings. Nothing related to spinning it, more related to the high pressure water getting forced into the new bearings, at least the front one, and shortening their (its) life.

Cheers,

blown 87

I use a couple of clamps and clamp them down to a solid steel workbench, then wind string around the shaft to spin them like a top.

Seems to work well, but it is academic by the time you get the torque tube out, at least for me, because at that point I AM going to change the bearings out.

I will say this much, I have yet to find a TT bearing that I would call good, a few did not make any noise yet, but they spun freely and were very low or out of grease.

There also seems to be no rhyme or reason behind when they will go bad, some have been kind of ok at over 100,000 miles, and others were fully bad at 50,000.

There also seems to be more of them fail at the rubber outer part than at the bearing it self in the lower mileage cars, usually due to oil leaks getting oil inside the tube which degrades the outer rubber and allows the bearing to migrate.

I know you know all that, just reporting for the folks that may not have been into a few of them.

Imo000

I think the main problem with the TT bearings is that htey are not sealed. The metal shield is only there to keep dust out. Why didn't they use normal sealed bearings in the factory is beyond me.

hr928

Wayne; thank you for your write up. I became an owner of a non-running left to disintegrate for 5 year in a Miami lot 1991 Porsche 928 S4....it was my dream car since I came to this country in 1984. Well, I just got it running for the first time THANKS TO YOUR WRITE UP! I swapped the transmission with a knownd running good one out of a 93 GTS, and it all worked out. I lot of work; with my phone or iPad on hand following your write up word by word, picture by picture I got it done...what a thrill! What a sense of accomplishment! Yes; Rennlist is a great resource....your write ups are even better! THANK YOU THANK YOU THANK YOU.

Dwayne

Hello Haroldo,
Happy to hear the write up was helpful. Congratulations on getting your transmission swapped out and your 928 running again! Sounds like good times ahead - ENJOY!

Paddcomp

Great write up, as usual from Dwayne. Did this ever get published in a single write up anywhere, checked Dwayne's usual norcal page and couldn't find it.

I'm about to get a mechanic to do my TC bearings and fit Super Bearing in the TT, having a print out would help with some of the 928 specifics.

Landseer

Dwayne, if you are out there --- thank you for this great writeup.

I need in particular the CH08 sub-routine, the step-by-step process for replacing TC Bearings on the 84 (and 5/6) automatic cars --- this thread delivers timelessly, and the embedded links still work, thank you!

JayPoorJay

Amaaaaazing instructional! Amazing!