Rearend identification
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| + | ==U-joints== | ||
| + | *1310 series, aka "small Chevy", has 1.063" diameter caps, 3.219" measured across to lock ring points, uses outside clips. Was OEM for many 1967-74 GM cars. | ||
| + | *1330 series pinion yokes use locating tabs to center the U-joint, has 1.063" diameter caps, 3.622" measured across to lock ring points, uses outside clips. Used on heavy-duty/high performance/big engine applications. | ||
| + | *GM 3R series is the "inside C-clip", or "inside lock" style. Used ~1975-up. It does not use locating tabs. It has 1.250" diameter caps, 2.556" measured across caps, aftermarket/replacement U-joints uses inside clips, originals use plastic injection. | ||
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| + | On the 12-bolt, the hardware used to hold the U-joint into the pinion yoke was either two 5/16" U-bolts, or 4 bolts and 2 metal straps. Both styles were used on original equipment applications. The U-bolts are the preferred method, if for no other reason than if either were to fail the U-bolt type can be easily replaced while the strap type might break off the bolt inside the yoke, making extraction difficult. | ||
| + | [[File:U-jnt girdle.jpg|right|200px]] | ||
| + | The yokes may be different for straps or U-bolts. The strap yoke (if smaller) can be drilled out to use U-bolts, but in some cases this leaves too little metal around the holes. A better approach is to use a yoke made for U-bolts in the first place. | ||
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| + | U-joint girdles (right) can be used to replace the original hardware. Be sure to match the diameter of the fasteners to the hole size of the yoke. | ||
| + | *[http://www.actionmachineinc.com/ujointmeasuringguide.aspx U-joint measuring guide] | ||
==MOPAR== | ==MOPAR== | ||
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