drive shaft u/j
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Cruising
Joined: Jan 2024
Posts: 14
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drive shaft u/j
Having trouble getting the right u/j for my rear drive/half shaft. Every time I order a pair the supplier says they will fit all corvettes from 63-82. They are all too small on the bearing cap but ok on the axis. Mine measure 3and 5/8" on the axis and 1 and 3/16" on the bearing cap. I believe this is a type 1350 and they are attached to diff by u clamps. Does anybody know part number for the Hardy Spicer joint? Supply over here in UK is limited.. Car is a 1978 auto.. Thanks
Le Mans Master
Joined: Jun 2019
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From: Indiana
Old Pro Solo Guy
Joined: Dec 2017
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From: Marlton NJ
Your rear axle half-shafts on a 78 should be 1350.
But strange things happen when people swap parts on old cars, and a couple of years of C3s did use 1330s at that location.
Both the 1350 & the 1330 measure the same width.
But the cap diameters vary. See above chart.
I would measure the cap diameters on both the axle hub side and the half-shaft side.
There are always combo joints that pair a 1350 half-shaft to a 1330 axle yoke, etc.
Now if you meant engine to diff driveshaft, it could be either 1310 or 1330 or one of each.
But strange things happen when people swap parts on old cars, and a couple of years of C3s did use 1330s at that location.
Both the 1350 & the 1330 measure the same width.
But the cap diameters vary. See above chart.
I would measure the cap diameters on both the axle hub side and the half-shaft side.
There are always combo joints that pair a 1350 half-shaft to a 1330 axle yoke, etc.
Now if you meant engine to diff driveshaft, it could be either 1310 or 1330 or one of each.
Last edited by leigh1322; Jan 27, 2026 at 11:30 PM.
