U joints 1/2 ton vs 3/4 ton - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*Fast68Chevy* · 04-25-2002, 06:23 PM

anyone know for sure if 1/2 ton use same or smaller U joints than 3/4 ton, i know there are different yokes for tranies and rear ends cuz of this, trying to find the info out and i forgot the numbers that describe the U joint sizes, the coloradok5 guys know this stuff, i think 1310 is 1/2 ton and 3/4 ton i dunno, and 1 ton i dunno, 1350 is largest though

------------------
Randy- Lincoln, IL

r68c30@hotmail.com 2177353230
-71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not)
-84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,,
-84 Firebird SE 2.8L T-5, rod knocking, dammit,,
-82 Firebird 350 4bolt (TBL)/TH350, not running, dammit...
buy/sell/hoard/trade most any GM vehicle parts of any kind
-parting out: '81 Cutlass Supreme Brougham
*Paint is overrated
© RSS Enterprises 2000

[This message has been edited by Fast68Chevy (edited April 25, 2002).]

**Desert Rat** · 04-25-2002, 06:28 PM

all 3/4 tons ive had had a bigger ujoint,but you can buy a adapter/conversion joint to hook it to a 1/2 drivehaft.if this is what your using.i was working with a Dana 60 and a 12bolt.

**COBALT** · 04-25-2002, 06:31 PM

Yeah, me too. That larger U-joint in the back is the only one that's special for 3/4 ton as far as I know. I remember, because the parts store that I bought my U-joints through accidentally pulled ones for 1/2 ton, and they all fit except for the back one. Turns out the front 2 are the same for 1/2 and 3/4 ton trucks. I had to go back and have them special order me a big one. The U bolts were another story all together...

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

[This message has been edited by new69owner (edited April 25, 2002).]

*Fast68Chevy* · 04-25-2002, 07:22 PM

thats interesting., i would think GM owuld have made all three joints in the shaft the same series, IE 1310, 1330, or 1350

sound slike you have a 1/2 ton shaft and tranny(4 speed only)and 3/4 ton axle yoke, that owuld require hybrid rear most joint, mix of 1310 and 1330 probably

i wonder what size 3/4 ton really used in 67-72, probably 1330, anyone know for sure ?

i need to find out what output yoke(has
1-3/8" diameter caps which is larger than the 12 botl yoke by far) that is on the Ch465(supposed to be from a 68 3/4 ton) and find out what joints are in the driveshaft im gonna use, may have to use hybrid at the tranny and/or rear axle(12 bolt)

measuring gauge time, now,,

hmmm....

------------------
Randy- Lincoln, IL

r68c30@hotmail.com 2177353230
-71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not)
-84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,,
-84 Firebird SE 2.8L T-5, rod knocking, dammit,,
-82 Firebird 350 4bolt (TBL)/TH350, not running, dammit...
buy/sell/hoard/trade most any GM vehicle parts of any kind
-parting out: '81 Cutlass Supreme Brougham
*Paint is overrated
© RSS Enterprises 2000

[This message has been edited by Fast68Chevy (edited April 25, 2002).]

Longhorn Man · 04-25-2002, 08:43 PM

I can say for 100% sure the old longhorn had larger U-joints (all 3) than theyu GMC. Plus, the parts store originally gave me 3 joints that were too small, and a c-bearing that was nothing like what I needed.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

Big69C20 Toy · 04-26-2002, 11:57 AM

I just did my u-joints. i've got the eaton rear and a th400 tranny. i had 3 big ones. 1350 or whatever the largest cap size is.

------------------
69 Custom 20, 396BB,Longbed fleetside.
New Oak Bed With SS strips... damn nice.

Edelbrock performer RPM-O, Edelbrock 750Carb, Headers, HEI, 2 40" glasspacks.
Stereo: Classic-style tape deck/radio, 2 6x9 Cerwin Vega's in doors, 2 10" Neo subs under seats, 1 900 Watt amp.

SN= Ares220

CE20934 · 04-26-2002, 11:58 AM

According to the parts books & computer at the local parts store, my '67 C20 takes one 1285 and two 1350s. My Chevy-printed '67 shop manual says the same thing.

Bull. I have 3 1350s.

Come to think of it, I have 1350s on my RV. Weird.

------------------
67 C20 '78 400sb 0.030" over, 9:1 cr, CC Xtreme 4x4 254H, port-matched '69 882 heads & stock cast iron intake, rebuilt Q-jet, Summit headers (1 5/8" primaries), true dual 2 1/2" glasspacked exhaust, NP435CR trans, 4.57 Eaton rear end.
It's a decent-looking work truck. No top-end, but it's great off the line.

'69 International Loadstar 1700 school bus converted to an RV. Working p/s (only took three years and three owners to replace the belt & a pressure line), low-compression 345 (176 certified net hp @ 3800rpm), single 3" exhaust w/custom cherry bomb muffler, NP435 trans, two-speed Eaton rear end, very warm & rodent-free heaters.

[This message has been edited by CE20934 (edited April 26, 2002).]

**COBALT** · 04-26-2002, 01:58 PM

Wow. This is strange. My truck's got the original TH400 in it, and original HO52(72?) axle. The rear U-joint is huge, but the other two are smaller. The center support bearing AND the U-joints all looked original when I pulled them. Maybe I'm wrong?

I don't know the numbers but I can easily find out. I still have the old ones sitting on my work bench...

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

*Fast68Chevy* · 04-26-2002, 06:40 PM

3500, ok, thats largest common ones, then there 1410, etc, but thats under the 1 1/2 ton trucks and bigger

new69, sounds likw you have 3/4 ton axle and 1/2 ton driveshaft, my shaft and Ch465 is all from a 68 3/4 ton and it has the 1 3/8" caps u joints and yoke, and the rear end is the original 1/2 ton 12 bolt axle and has the tiny little U joints..

all seems right on this end regarding all this, i now have new carrier bearing installed as of tonight(thanks GMC PAUL) and new tranny yoke U joint to install soon and then the driveshaft(thanks CPNE), install radiator support, front clip and put one of my stock aluminum 4 bbl intakes on the 350 and connect engine up and do brakes work all around the truck and see what it will do, oh and install steering column, roof lights, remove mirrors, and install exhaust of some kind(open head pipes will work for now) and remove bed temporarily or bolt it down with some metal in the laid on the floor since floor is rotted away

got some truck building work cut out for me now..

thanks guys!

------------------
Randy- Lincoln, IL

r68c30@hotmail.com 2177353230
-71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not)
-84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,,
-84 Firebird SE 2.8L T-5, rod knocking, dammit,,
-82 Firebird 350 4bolt (TBL)/TH350, not running, dammit...
buy/sell/hoard/trade most any GM vehicle parts of any kind
-parting out: '81 Cutlass Supreme Brougham
*Paint is overrated
© RSS Enterprises 2000

04-25-2002, 06:23 PM	#1
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	U joints 1/2 ton vs 3/4 ton anyone know for sure if 1/2 ton use same or smaller U joints than 3/4 ton, i know there are different yokes for tranies and rear ends cuz of this, trying to find the info out and i forgot the numbers that describe the U joint sizes, the coloradok5 guys know this stuff, i think 1310 is 1/2 ton and 3/4 ton i dunno, and 1 ton i dunno, 1350 is largest though ------------------ Randy- Lincoln, IL r68c30@hotmail.com 2177353230 -71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not) -84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,, -84 Firebird SE 2.8L T-5, rod knocking, dammit,, -82 Firebird 350 4bolt (TBL)/TH350, not running, dammit... buy/sell/hoard/trade most any GM vehicle parts of any kind -parting out: '81 Cutlass Supreme Brougham *Paint is overrated © RSS Enterprises 2000 [This message has been edited by Fast68Chevy (edited April 25, 2002).]

04-25-2002, 06:31 PM	#3
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Yeah, me too. That larger U-joint in the back is the only one that's special for 3/4 ton as far as I know. I remember, because the parts store that I bought my U-joints through accidentally pulled ones for 1/2 ton, and they all fit except for the back one. Turns out the front 2 are the same for 1/2 and 3/4 ton trucks. I had to go back and have them special order me a big one. The U bolts were another story all together... ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! [This message has been edited by new69owner (edited April 25, 2002).] __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

04-26-2002, 11:57 AM	#6
Big69C20 Toy Livin' it up. Join Date: Nov 2001 Location: Richland, MI Posts: 2,212	I just did my u-joints. i've got the eaton rear and a th400 tranny. i had 3 big ones. 1350 or whatever the largest cap size is. ------------------ 69 Custom 20, 396BB,Longbed fleetside. New Oak Bed With SS strips... damn nice. Edelbrock performer RPM-O, Edelbrock 750Carb, Headers, HEI, 2 40" glasspacks. Stereo: Classic-style tape deck/radio, 2 6x9 Cerwin Vega's in doors, 2 10" Neo subs under seats, 1 900 Watt amp. SN= Ares220 __________________ -Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.

04-26-2002, 11:58 AM	#7
CE20934 Senior Member Join Date: Apr 2002 Location: Help! I'm in an office park with its own network of freeways! Posts: 470	According to the parts books & computer at the local parts store, my '67 C20 takes one 1285 and two 1350s. My Chevy-printed '67 shop manual says the same thing. Bull. I have 3 1350s. Come to think of it, I have 1350s on my RV. Weird. ------------------ 67 C20 '78 400sb 0.030" over, 9:1 cr, CC Xtreme 4x4 254H, port-matched '69 882 heads & stock cast iron intake, rebuilt Q-jet, Summit headers (1 5/8" primaries), true dual 2 1/2" glasspacked exhaust, NP435CR trans, 4.57 Eaton rear end. It's a decent-looking work truck. No top-end, but it's great off the line. '69 International Loadstar 1700 school bus converted to an RV. Working p/s (only took three years and three owners to replace the belt & a pressure line), low-compression 345 (176 certified net hp @ 3800rpm), single 3" exhaust w/custom cherry bomb muffler, NP435 trans, two-speed Eaton rear end, very warm & rodent-free heaters. [This message has been edited by CE20934 (edited April 26, 2002).] __________________ '67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. fingers crossed

04-26-2002, 01:58 PM	#8
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Wow. This is strange. My truck's got the original TH400 in it, and original HO52(72?) axle. The rear U-joint is huge, but the other two are smaller. The center support bearing AND the U-joints all looked original when I pulled them. Maybe I'm wrong? I don't know the numbers but I can easily find out. I still have the old ones sitting on my work bench... ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

04-25-2002, 06:28 PM	#2
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	all 3/4 tons ive had had a bigger ujoint,but you can buy a adapter/conversion joint to hook it to a 1/2 drivehaft.if this is what your using.i was working with a Dana 60 and a 12bolt.

04-25-2002, 07:22 PM	#4
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	thats interesting., i would think GM owuld have made all three joints in the shaft the same series, IE 1310, 1330, or 1350 sound slike you have a 1/2 ton shaft and tranny(4 speed only)and 3/4 ton axle yoke, that owuld require hybrid rear most joint, mix of 1310 and 1330 probably i wonder what size 3/4 ton really used in 67-72, probably 1330, anyone know for sure ? i need to find out what output yoke(has 1-3/8" diameter caps which is larger than the 12 botl yoke by far) that is on the Ch465(supposed to be from a 68 3/4 ton) and find out what joints are in the driveshaft im gonna use, may have to use hybrid at the tranny and/or rear axle(12 bolt) measuring gauge time, now,, hmmm.... ------------------ Randy- Lincoln, IL r68c30@hotmail.com 2177353230 -71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not) -84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,, -84 Firebird SE 2.8L T-5, rod knocking, dammit,, -82 Firebird 350 4bolt (TBL)/TH350, not running, dammit... buy/sell/hoard/trade most any GM vehicle parts of any kind -parting out: '81 Cutlass Supreme Brougham *Paint is overrated © RSS Enterprises 2000 [This message has been edited by Fast68Chevy (edited April 25, 2002).]

04-25-2002, 08:43 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	I can say for 100% sure the old longhorn had larger U-joints (all 3) than theyu GMC. Plus, the parts store originally gave me 3 joints that were too small, and a c-bearing that was nothing like what I needed. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

04-26-2002, 06:40 PM	#9
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	3500, ok, thats largest common ones, then there 1410, etc, but thats under the 1 1/2 ton trucks and bigger new69, sounds likw you have 3/4 ton axle and 1/2 ton driveshaft, my shaft and Ch465 is all from a 68 3/4 ton and it has the 1 3/8" caps u joints and yoke, and the rear end is the original 1/2 ton 12 bolt axle and has the tiny little U joints.. all seems right on this end regarding all this, i now have new carrier bearing installed as of tonight(thanks GMC PAUL) and new tranny yoke U joint to install soon and then the driveshaft(thanks CPNE), install radiator support, front clip and put one of my stock aluminum 4 bbl intakes on the 350 and connect engine up and do brakes work all around the truck and see what it will do, oh and install steering column, roof lights, remove mirrors, and install exhaust of some kind(open head pipes will work for now) and remove bed temporarily or bolt it down with some metal in the laid on the floor since floor is rotted away got some truck building work cut out for me now.. thanks guys! ------------------ Randy- Lincoln, IL r68c30@hotmail.com 2177353230 -71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not) -84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,, -84 Firebird SE 2.8L T-5, rod knocking, dammit,, -82 Firebird 350 4bolt (TBL)/TH350, not running, dammit... buy/sell/hoard/trade most any GM vehicle parts of any kind -parting out: '81 Cutlass Supreme Brougham *Paint is overrated © RSS Enterprises 2000



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