Pilot bearing replacement
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BTW, is it your daily driver?

Last edited by grinder11; Nov 4, 2023 at 04:11 PM.





I just had my Clutch done with a newer Overhauled Torque Tube installed and the labor was $1600 here in the Chicago-land area. That was to replace or overhaul everything from the pilot bearing back to the differentiial. Its a big job to even get after that bearing. Cost of the GM bearing is around $22. I'd say he's doing you right by that $800 figure. Baffling why he wouldn't have quoted the bearing and anything else "While he was in there"...
Big job!
Lots of stuff to remove to get at the pilot bearing!
There she blows! Right in the center of the crankshaft.
Shiny and new





If I were doing the job myself I'd take the input shaft to work and do that mod. Looks like a much better solution. I was warned when the job was started that if the input shaft was bad that would be another $600 for a new one from GM. Your solution is a no brainier if you have access to a lathe (I do). If it ever comes apart again I will certainly do this. Thanks for posting. The shaft and bearing on mine were fine it was the older 1998 TT that cracked upon dis-assembly to go along with my smoked clutch from power upgrades I did this spring. I got an RPM overhauled TT from a newer car (2001-2004). With any luck I'll never have to have it down to that level again, but you never know...
Modifying the shaft would be easy, is there anything done to the ID of the crank? Got the PN/ application handy?
Thanks!
GM "Bigger" Pilot Bearing for LSx Applications
12557583 1 $21.99 USD $21.99 USD
This machine shop in Lakeland Florida did the grinding for me for $80: Terry Lesnett, machining Lakeland:
https://maps.app.goo.gl/fomrq23KczLcvTKX9
These are the guys in Texas that do it as well for the same price Texas drivetrain performance : https://maps.app.goo.gl/N26aggKDoKQctNLFA
Cheaper than putting the crappy pilot bearing with no inner race back in with a new shaft.
No alteration to the crankshaft needed. The crankshaft was designed to accept this bearing in Cadillac applications
When installing this upgraded bearing take note of the line since the bearing is directional. If you put it in backwards it won't slide in the crankshaft
Last edited by douglasjre; Nov 7, 2023 at 10:33 AM.
mine just dropped off yesterday after maybe 2 years of having a dss fiber shaft in with solid couplers. Same deal, have to drop the whole *** , as we all know. If I had a lift I'd tackle.it. but last drive of the year. I picked up a rotating noise/ vibration when I let out the clutch. Im pretty confident something will be obviously broken. But I am bracing to be seriously pissed if something came apart on that fiber shaft. Supposed to be good to 1000 hp, I dynoed at 400 at the tires. We will see.....oh, and quote is 1600 to drop and put back, before parts
Oh and actually getting the old TO bearing out was a fairly major pita as well. Just added to the overall difficulty of the entire project.













