mikemodano9c

I bought a chromoly driveshaft used and im having a hard time getting it installed...the shaft was installed on a 12 bolt so it had a 1350 to 1350 Spicer installed...

3" x .083" Chrome Moly Tubing
1350 Series Spicer HD U-Joints
Electronically Balanced
Heavy Duty Trans Yoke Installed (specify trans)
Custom Built for Your Combination (specify length)

I had a 1350/1310 Spicer U-Joint installed on the shaft (#153) as seen here
Conversion U-Joint

so the 1350 (larger) caps are installed in the driveshaft and the 1310 (smaller caps) are going into the rearend yoke. The problem is that the 1310 caps don't come close to filling the the yoke on the rearend...there is lots of room on each side when centered on the rearend yoke. The caps do not have washers like the one is the picture, im not sure if that is changing anything, since the stock caps that go on the rearend yoke have washers also...

If someone has some input i would greatly appreciate it...i have the stock caps off the stock u joint on the spicer joint going into the rearend right now, but they are not the right size...and it vibrates...

anyone have any ideas? what am i missing? do i just have the wrong caps?

kp

iTrader: (34)

you need those 'C' clips on the 1310 side, thats what holds the cap in place.

1BADAIR

iTrader: (1)

Everyone says the stock u-joint is a 1310 but it is not. The 1310 is too small as you found out. The size is a 845g I believe. I had the problem because everyone said it was a 1310 so thats what I asked for, well I got 2 different wrong u-joints. Get a 447 napa or precision and look at the dimesions and you will see that the small side of the 447 matches the dimesion of a stock replacement joint.

mikemodano9c

The NAPA 447 joint worked fine...thanks

kp

iTrader: (34)

Just to clarify Y2KAIR is correct, these cars use a saginaw 3R joint and NOT a 1310 stock (even I call them 1310, dont know why). The 13xx joint dimentions are:

1310, End of Cap to End of Cap 3.219", cap dia 1.063"
1330, End of Cap to End of Cap 3.622", cap dia 1.063"
1350, End of Cap to End of Cap 3.622", cap dia 1.188"

The 3R joint in these cars use 1.125 dia caps and the span is larger then a true 1310.

The precision 447 is a 3R to 1350 joint.
Precision 534 is the stock u-joint.
A 'real' 1310 to 1350 joint is a precision 348 which is not correct..
And if you are like me and get an aftermarket driveshaft with a 1330 (mostly ford) joint a 1330 to 1350 is a precision 448

More info then anyone needs to know but thought I would put it in here for future searches before I forget

koolrayz

iTrader: (26)

Once again LS1TECH to the rescue. I had this same thing going on at the parts store this morning. So i come online and bingo everything i could need to know is right here in front of my ugly face. Thanks for the informative post

stupercharged

iTrader: (1)

Thank you for that information bought the 348 and might as well banged my head on the wall wondering why everyone says its the 348 when its supposed to have inner clips not outer

shepss217

iTrader: (5)

yup the actual stock u joint size is a 1344 which is almost a 1350 except it takes the c clips on the inside of the caps instead of using the retaining clips on the outside of the caps