72 ujoints

[Rick M.]

Are the ujoints in the driveshaft and the halfshafts the same? Thanks

[Patrick H.]

Re: 72 ujoints

No, they are not.

Driveshaft ones may have grease zerks, halfshaft ones don't.

Patrick

[Gene M.]

Re: 72 ujoints

Half shaft joints are a whole lot bigger than drive shaft's........

[Rick M.]

Re: 72 ujoints

Should there be grease zerks in the drive shaft?

[Joe L.]

Re: 72 ujoints

Should there be grease zerks in the drive shaft?

Rick-----


Usually, there are no grease fittings on original driveshaft u-joints.

[Rick M.]

Re: 72 ujoints

Thank you that is what I thought.

[Ron G.]

Re: 72 ujoints

The half shaft u-joints are not only slightly larger, but are usually seen with a raised boss on one side and sometimes have the name Spicer on them in raised letters. GM replacements are usually seen with a zerk grease fitting. The u-joints for the drive shaft are marginally smaller and have a depression in the center. I have never seen any originals with a zerk grease fitting, maybe an aftermarket, but not an original.

[Ray K.]

Re: 72 ujoints

Rick

The u-joints for the driveshaft have a bearing cup diameter of 1 1/16 " while the halfshafts use a bearing cup at 1 3/16" diameter.

Ray