14 bolt rear question

[1991chevy1500extcab]

I have a 1991 chevy k1500 extra cab manual transmission I was under it the other day and found some play in rear driveshaft after taking it apart I realized something was wrong I'm working on the rear u joint at rear end the driveshaft has 1 1/16 cap size and rear end yoke is 1 3/16 they don't make a u joint like that so I'm guessing ether the rear end or driveshaft were replaced the rear end has a 14 bolt diff cover and 6 lug rims I just don't know which one was replaced

 

[thz71]

I have a 1991 chevy k1500 extra cab manual transmission I was under it the other day and found some play in rear driveshaft after taking it apart I realized something was wrong I'm working on the rear u joint at rear end the driveshaft has 1 1/16 cap size and rear end yoke is 1 3/16 they don't make a u joint like that so I'm guessing ether the rear end or driveshaft were replaced the rear end has a 14 bolt diff cover and 6 lug rims I just don't know which one was replaced

It's a 14 bolt sf. If it was swapped in your half ton you'll need a conversion u joint. If it was stock someone either swapped the driveshaft or put the wrong u joint in.

 

[1991chevy1500extcab]

I went to advance auto and they don't even have a u joint listed to fit it I think the rear end was changed cause the leafs prong u bolts look newer is the 14 bolt semi float any good ?

 

[thz71]

I went to advance auto and they don't even have a u joint listed to fit it I think the rear end was changed cause the leafs prong u bolts look newer is the 14 bolt semi float any good ?

I'll try and find you a part #. Yes the 14bolt is a very good axle

 

[thz71]

http://m.summitracing.com/parts/mog-348

 

[Jorge6.5]

Pretty sure it could be a 447 u joint from Napa. Almost positive that's what I used on my half ton with 14 bolt rear swap

 

[MarkZ28]

Rear out of a SS454 truck?

 

[90halfton]

Rear out of a SS454 truck?

Not with 6 lugs

 

[thz71]

Rear out of a SS454 truck?

Nope like I said they came stock in alot of half tons