1350 best choice- do use the spicer joint and the one with the grease fitting in the cap works great
I WAS assleap right after the ball game
for those lurking later courtesy of Denny' driveshaft facs
What is the difference between 1310, 1330 and 1350 Series?
The "series" of a driveshaft or universal joint is determined by the actual dimensions of the u-joint.
While the front and rear u-joint can be of two different sizes the shaft is only as strong as the smaller one.
The 1310 series u-joint measures approximately 3 1/4 inches wide.
The 1330 and 1350 both measure approximately 3 5/8 wide.
The 1310 and 1330 series can have cap diameters of 1 1/16 and/or 1 1/8 inch or a combination of both sizes.
The 1350 series has a cap diameter of 1 3/16 inch and the body and journals are bigger than the 1310 or 1330.
Remember 1350 is almost never found in production car driveshafts.
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When is it necessary to upgrade to 1350 series?
It is always a good choice to upgrade to the 1350 series components whenever your application is used for racing or with high horsepower and street use. Stock driveshafts were designed to handle a modest amount of horsepower. If your application has more than 400 horsepower then its time to consider a new shaft.
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What is the difference between the Chrysler 7260 and 7290 series?
The 7260 and 7290 series are the two sizes that are commonly found on Chrysler products.
They represent the two stock sizes that have been used for many years.
The 7260 series is the “small” Chrysler u-joint size (2 1/8 inch between flats on yoke with 1.078 inch bearing cap diameter) and the 7290 series is the “big” Chrysler u-joint size (2 5/8 inch between flats on yoke with 1.125 inch bearing cap diameter).
The 7260 series is similar in size to the 1310 series and the 7290 is similar in size to the 1330 series.
They both utilize the inside “C” clip design to hold the u-joint within the yoke flats whereas the 1310 and 1330 use the outside snap ring design.
How tight should I tighten my u-bolts?
1310 series and 1330 series should be tightened to 17 ft/lbs and
1350 series to 20 ft/lbs.
You should never tighten the nuts on any u-bolt excessively.
This will cause the cap to distort and the u-joint will fail prematurely.