U-Joints?
Thread Starter
Racer
Joined: May 2005
Posts: 277
Likes: 39
From: Billings, Montana but forever from Nebraska
U-Joints?
I believe it maybe time to plan the replacement of my 89’s U-Joints. What I’m not sure of is which are the best to use? I autocross & need something to hold up long term.
Thread Starter
Racer
Joined: May 2005
Posts: 277
Likes: 39
From: Billings, Montana but forever from Nebraska
I found what I believe is the cold forged non zerk unit. It only shows its for the driveshaft at rear axle. Are the half shafts different? Any chance you have an item number? Thanks!
Drifting
Joined: Jan 2021
Posts: 1,311
Likes: 383
From: Northern California
I want to say the halfshafts U joints are Spicer 5-447X, x 4 needed. I don't have a source.
I think Zip Corvette sells the solid U joints for the driveshaft itself. Don't have the part number for those.
I think Zip Corvette sells the solid U joints for the driveshaft itself. Don't have the part number for those.
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Heel & Toe
Joined: Jul 2023
Posts: 24
Likes: 4
I bought those 3615X for my halfshafts, but looking at the old strap bolts it's pretty clear they're not good for re-use... so I'm looking to get new bolts and straps, but which is the correct bolt for an early 85? Is it 5/16"?
Safety Car
Joined: Mar 2017
Posts: 4,157
Likes: 1,293
From: LeClaire Iowa
These are the ones I bought. In retrospect, I almost wish I had bought a u-joint with a grease zerk. I have a 1 mile drive on gravel before I get to a paved road. The u-joints are covered with gravel dust held on by oil. The dust seems to suck out the grease. I really wish I could grease them since they have been in 5 years. Has anyone ever taken out the zerkless u-joints and cleaned and regreased them? Dan
Melting Slicks
Joined: Mar 2002
Posts: 2,873
Likes: 764
From: Sligo PA
Like others have said the Spicer grease less are the only way to go. Remember to get the coated version any time it's going on an aluminum shaft. The half shafts are 1350 sized and the factory driveshaft is 1310.
I would use the Denny's website to find the part numbers you need but I wouldn't order from them. They have a bad reputation. I would order the same set from Summit or Rock Auto.
I would use the Denny's website to find the part numbers you need but I wouldn't order from them. They have a bad reputation. I would order the same set from Summit or Rock Auto.
Pro
Joined: Jan 2005
Posts: 686
Likes: 62
From: San Jose Ca
Like others have said the Spicer grease less are the only way to go. Remember to get the coated version any time it's going on an aluminum shaft. The half shafts are 1350 sized and the factory driveshaft is 1310.
I would use the Denny's website to find the part numbers you need but I wouldn't order from them. They have a bad reputation. I would order the same set from Summit or Rock Auto.
I would use the Denny's website to find the part numbers you need but I wouldn't order from them. They have a bad reputation. I would order the same set from Summit or Rock Auto.
Melting Slicks
Joined: Mar 2002
Posts: 2,873
Likes: 764
From: Sligo PA
I've placed a few orders with Denny's Driveshafts recently and couldn't have had a better experience. Had what I needed, better prices than summit, quick shipping, and even personally called to verify there wasn't fraud as the shipping address was different than the billing. I like them.