Old U-joint question

[rotten03]

I know this has been beat to death but I cant find the answer. What Ujoint do I need to mate my 1/2 ton truck to a 14bff axle. The driveshaft that is. And do i need a special U-joint for the front D44 I just put on the front?

 

[BlazerGuy]

Napa PN 447 is a 1330-1350 - for a 10 bolt to 14 bolt

Napa PN 348 is a 1310-1350 - 12 to 14 bolts

I believe the 44 will bolt right up...not sure though...

 

[Muddytazz]

What he said, and yes, the D44 doesn't need a conversion joint, just bolts right up.

 

[rotten03]

Thanks alot fellas.

 

[84_Chevy_K10]

[ QUOTE ]
Napa (Precision) PN 447 is a Saginaw S44-1350 - for a 10 bolt to 14 bolt Neapco part number 3-3140

Napa (Precision) PN 348 is a 1310-1350 - 12 to 14 bolts Neapco part number 2-1153

I believe the 44 will bolt right up...not sure though...

[/ QUOTE ]

Fixed it for you.

A 10 bolt does not use a 1330 or a Spicer style u joint at all. It uses a saginaw joint and that is why it has internal locking clips for retention.

The 12 bolt rear axle uses 1310 u joints which have external locking clips in the driveshaft and locating tabs on the pinion yoke to keep the joint from walking side to side.

All Chevy front axles reguardless of year or model have Spicer 1310 series U joints at the pinion including the Dana 60. This will be neapco part number 1-0153 but whatever is in your driveshaft currently will fit.

 

[R72K5]

14 bolt SF use spicer i know, just so anyone who needs to know does know, i know the 83 K20 rear shaft are spicer anyways, would be same deal for at least '81-87 years

at napa to get one of these conversion joints you just need to tell them application of the axle and of the driveshaft and they will get the joint you need

also the car 8.5" 10 bolts used outside lcips through the 70s i know
just got done with a 74 8.5" nova axle and it was outside clips


trucks opposite way aorund with the 8.5:"

 

[84_Chevy_K10]

All 3/4 and 1 ton trucks use Spicer 1350 series u joints in the rear driveshaft.

I was not referring to 10 bolts from cars or from the '70s. GM did not put a 10 bolt in the rear of their trucks at that time, and when they did, they all used Saginaw u joints with a few minor exceptions (4 speed trucks supposedly).