The Stovebolt Site Forums The Shop Area Driveline U joint identification help

The front ujoint on my 56 3100 w/3 spd 235 is catching a bit so I went to replace it. I ordered the "stock" joint that appears on most sites for the truck and it doesn't fit. It was a Precision 369,also pn 1-0153. That is a straight ujoint with 4 outside clip 1.062" cups. It doesn't fit.

The joint on my truck has two outside clip cups that are 1.062" and two inside clip cups that are 1.125" diameter. There are some numbers stamped on the old joint. "054"; "N174"; "RW"; and "USA". Also, the inside distance between the holes on the slip yoke are 2.38" apart and the inside distance between the holes on the drive shaft is 2.45". I have a cheap caliper so my measurements may be off a bit, but are close.

I have spent the better part of the day trying to weave through various sites and tables to determine which ujoint I should purchase. Does anybody have any tips that could help me? Thanks.

According Spicer, you need a 1310 series Ujoint, part number 5-153X.

Thanks, that was the tip I needed. I needed a conversion joint, given the different cup sizes. I got a Neapco 3-3130/1310 conversion joint. Hope that fits!

I beleive I might have jumped the gun a bit, as I didn't realize you needed a conversion joint. The joint I listed is a stock replacement. I did go back in with the dimensions you listed, though, and came up with 2 choices from Spicer, both in the 1330 series U joint. One is a 5-7438X, the other is a 5-1204X.

Take the old one to a FLAPs and have it matched up they will measure the old one and give you a replacment and NO shipping or getting the wrong one.Many parts for our trucks are an over the counter item.

Pete

Thanks for the tips. After calling around I found out that the issue is the size of the old slip yoke. I need a 1210 to 3R conversion u joint and apparently they aren't made any more. I was told that I can get a Spicer 1331 slip yoke to replace my old yoke and then the conversion joint I have will fit. Does this make sense to you guys?

i had that issue on the front joint on the rear shaft of my 40. so i took it to a spicer rep. and he got two new joints, a spicer and another name brand and neither would fit. the cross wouldnt slip in to install the cups. he then got a new spicer youke and the yokes were configured slightly from the old days to current design. he said to just grind just enough off of both insides of the yoke until the joint slipped in. i did just that and no more issues.