1970 U-joints

[Stephen B.]

Does anyone have pictures of original u-joints for a 1970?

[Mark D.]

Re: 1970 U-joints

Driveshaft:



Halfshaft:

[Stephen B.]

Re: 1970 U-joints

Thanks. Isn't the end cap suppose to say "Spicer" on it?

[Alan S.]

Re: 1970 U-joints

Hi Stephen,
For frame of reference only; my 71, #6589, January built, SB, has SPICER written on the end of the cap with the letters in an arc. They are the original u-joints.
Regards,
Alan

PS: I hit enter too soon.
The above is for the DRIVE-SHAFT u-joints. The HALF-SHAFT u-joint caps are plain/smooth on the end.

[Stephen B.]

Re: 1970 U-joints

Thanks Alan. I'd love to see the "Spicer" on the u-joints if you or someone has a picture.

[Joe L.]

Re: 1970 U-joints

Thanks Alan. I'd love to see the "Spicer" on the u-joints if you or someone has a picture.

Stephen-----


I don't think that all u-joints used on Corvettes of the period did have the "Spicer" brand name embossed on the caps. I believe that some were either manufactured by Spicer with NO reference to Spicer on the joint AND with "GM" embossed on the body of the joint OR they were manufactured by some internal GM division. Personally, I think it was the latter. This applied mainly to the half-shaft u-joints, but I believe it included driveshaft u-joints, as well.

[Greg L.]

Re: 1970 U-joints

Here are some joints out of my 69. The restored joint used to look like the old cruddy one on the left. It's amazing what one can do with a mild solution of muriatic acid, a stainless steel brush and some patients.

If you would like full size pics just send me your e-mail and I'll send you some.

[Patrick H.]

Re: 1970 U-joints

Here are some joints out of my 69. The restored joint used to look like the old cruddy one on the left. It's amazing what one can do with a mild solution of muriatic acid, a stainless steel brush and some patients.

If you would like full size pics just send me your e-mail and I'll send you some.

Were the bearings inside the U-joints still good?
"Most" old ones I've seen have turned to rust powder and are useless.

Patrick

[Greg L.]

Re: 1970 U-joints

Yes Patrick they were almost like new. You could see where the needles had started to polish little marks on the stubs but there was no measurable wear what so ever.

[Stephen B.]

Re: 1970 U-joints

Greg,

Please send me the pictures to BunkyByrd@aol.com. I appreciate it.



Joe,

The 70-72 judging manual states that the half shaft joints had Spicer on the caps, but it does not say with regard to the driveshaft. I was curious to see what a Spicer stamped cap looked like.

[Mark D.]

Re: 1970 U-joints

Here is a shot of some GM part numbers

[Stephen B.]

Re: 1970 U-joints

Thanks for the pic.

[Joe L.]

Re: 1970 U-joints

Here are some joints out of my 69. The restored joint used to look like the old cruddy one on the left. It's amazing what one can do with a mild solution of muriatic acid, a stainless steel brush and some patients.

If you would like full size pics just send me your e-mail and I'll send you some.

Greg------


These look like 68-70 THM-400 driveshaft u-joints. Is that what they are?

[Greg L.]

Re: 1970 U-joints

That's what they are Joe...

What is it about them that tells you that???

[Joe L.]

Re: 1970 U-joints

That's what they are Joe...

What is it about them that tells you that???

Greg-----


Several things. The apparent size of the bearing caps, the apparent width of the fingers, the "depressions" in the center of the body of the joint, and the fact that they have "Spicer" on the end caps.