u joint conversion question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Frijolito1988 · 03-03-2014, 01:04 AM

Hey guys here is my question

I have a 72 c10 with a TH400 transmission. I also have a 5 lug rear end . The u joints are not the same when i try to connect the driveshaft to the rear end. The rear end is much smaller.

Do they sell a u joint with 2 small ends for the rear end , and 2 bigger ends for the th400 driveshaft ?

Molberg · 03-03-2014, 03:27 AM

Yes they do... I did the exact thing to my 72 gmc I had. I went to a one piece driveshaft at the time as well.... From the donor truck I took the tranny from.

Tx Firefighter · 03-03-2014, 07:39 AM

It's a common question so I took a picture of the last one I installed to show the part number you need.

Frijolito1988 · 03-03-2014, 01:56 PM

Quote:

Originally Posted by Tx Firefighter

It's a common question so I took a picture of the last one I installed to show the part number you need.

Awsome!

Looks like my local parts store has it, going to go check it out during my lunch break

brad_man_72 · 03-05-2014, 12:25 AM

Yikes, I wouldn't put a precision joint in my neighbors lawnmower.
What size joints are you using? 1350, 1330, 1310, 3r? Spicer and neapco both make decent ujoints built within some tolerances.

The precision 372 is for 3r-1310 so if the "big" caps have inside keepers (notice the flat areas on the inside of the trans yoke posted) and the "small" cap side is also significantly more narrow it might be the ujoint that you need.

03-03-2014, 01:04 AM	#1
Frijolito1988 Registered User Join Date: Jul 2010 Location: So Cal Posts: 421	u joint conversion question Hey guys here is my question I have a 72 c10 with a TH400 transmission. I also have a 5 lug rear end . The u joints are not the same when i try to connect the driveshaft to the rear end. The rear end is much smaller. Do they sell a u joint with 2 small ends for the rear end , and 2 bigger ends for the th400 driveshaft ?

03-03-2014, 03:27 AM	#2
Molberg Registered User Join Date: Dec 2012 Location: Manitoba Posts: 644	Re: u joint conversion question Yes they do... I did the exact thing to my 72 gmc I had. I went to a one piece driveshaft at the time as well.... From the donor truck I took the tranny from. __________________ -Project Nitemare- http://67-72chevytrucks.com/vboard/s...d.php?t=607359

03-03-2014, 07:39 AM	#3
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: u joint conversion question It's a common question so I took a picture of the last one I installed to show the part number you need. __________________ I'm on the Instagram- @Gearhead_Kevin

03-05-2014, 12:25 AM	#5
brad_man_72 the boat guy Join Date: Jul 2007 Location: springfield mo Posts: 2,339	Re: u joint conversion question Yikes, I wouldn't put a precision joint in my neighbors lawnmower. What size joints are you using? 1350, 1330, 1310, 3r? Spicer and neapco both make decent ujoints built within some tolerances. The precision 372 is for 3r-1310 so if the "big" caps have inside keepers (notice the flat areas on the inside of the trans yoke posted) and the "small" cap side is also significantly more narrow it might be the ujoint that you need. __________________ 67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project, Last edited by brad_man_72; 03-05-2014 at 12:32 AM.



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