C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

U joint replacment

Old May 19, 2013 | 09:21 AM
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Default U joint replacment

is that a real chore like on earlier Vettes. what is the book rate to do it
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Old May 19, 2013 | 09:48 AM
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Originally Posted by Nowhere Man
is that a real chore like on earlier Vettes. what is the book rate to do it
For a Corvette C4 that's a minimum of 17+ years old to an earlier that could be as old as 28+ years old "book rate" doesn't I would think apply. If you're looking for the time it might take "you" to accomplish the task it depends on of course your tools at hand, your patience and knowledge of the task. If your looking to "shop the job" I'd say if you've a relationship with someone you trust it's worth likely his asking price and maybe a "tip"!!

Add maybe a balance of the drive-shaft along with the install, some shops insist.

You could consider removing all three taking them to a drive-line shop and have them serviced. That leaves you maybe the pinion seal, short-axle seals and the transmission rear seal to accomplish or if your interested in "shopping the job" those need to be taken into consideration also!

Last edited by WVZR-1; May 19, 2013 at 09:53 AM.
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Old May 19, 2013 | 09:54 AM
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well the last time I removed U joints from a half shaft I had to use a torch a heat every thing all up. so you think that that it will be the same. nothing else special about doing it.

its either my U joints going bad or the barrings in the T/A at the spindle
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Old May 20, 2013 | 04:49 PM
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I did the u-joints on the half shafts about 3 years ago, it took about 2 hours to get one side all apart and about 1/2 for its reinstall, on my back. I had a frozen joint that was not cooperating so I wound up disconnecting the u-joint at the differential and then removing the knuckle so I had room to push the half shaft out. I can of PB Blaster and an electric impact gun helped to the job. It's not a bad job IMO.
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Old May 20, 2013 | 05:23 PM
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You don't want to use a torch on these since they're aluminum

I did one side a couple of months ago in the time frame described above. Found that the simple way to get the shaft out as to remove the strap bolts at both ends, and then remove the 3 bolts that retain the bracket to the frame where to two forward pointing control arms bolt up, along with the bottom strut rod. Once that was done you could pull the knuckle out enough to get the shaft out. No need to remove the big nut and pull out the splined end from the hub.

I dropped it off to have the joints pressed out as my vise was too small and I didn't want to pound on an aluminum shaft.

Hope that helps.
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Old May 20, 2013 | 06:46 PM
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I used a large bench vice to press them out and the new ones in. Worked and didn't damage a thing but wears you out with the amount of force it takes to turn the vice down. In retrospect I would have invested in a cheap hydraulic A frame press.

Don't hammer or heat -- aluminum shafts.
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Old May 20, 2013 | 07:15 PM
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About 10yrs ago I took the '88 to a Chevy dealer in CT who had a "Vette mechanic"; it cost me ~$150 and he was done in about an hour.
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Old May 20, 2013 | 07:32 PM
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Here is a pretty good How To write-up if you decide to tackle the job yourself.

P.
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Old May 24, 2013 | 01:21 PM
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Originally Posted by Nowhere Man
is that a real chore like on earlier Vettes. what is the book rate to do it
Believe it or not, the book rate is around four hours/side. I saw that online here and verified it at my local Chevy dealer.

However, I did it myself in less than 3 hours per side, and that was the first work I'd ever done on a Corvette! (I had just aquired mine the month before.)

In addition, I found that you don't have to disassemble the suspension as described in the pdf instructions that are usually cited. If you're interested, my writeup of how I did it is here with some additional info here.

I did not find it to be difficult, and I know there is no way an experienced dealership mechanic with a lift would take more than an hour or two per side to do this job. It's really a fairly easy job.
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