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soleeagle · 10-16-2004, 10:15 PM

The other day I ran into an old freind. We got to talking about our vehicles and I had told him I was looking to fine a set of 3/4 ton axles. He told me that he had a truck with a busted tranny and trasfer case sitting in his yard. I ask him what he wanted for it and his reply was, "If I could find some one to pull the motor out of it they could just have the rest of the truck". I told him I was his guy and today we pulled it to the shop and went to work. In about 45 minutes I had the motor out. I Got the axles out tonight ad found that they have 4:10 gears in them. I do have a question, how do I tell the difference from a 3/4 ton and a 1 ton rear? The brake drums just look a little big to be 3/4 to me. I am guessing that it is a GM 14 bolt but not sure how to tell the difference. It does have 14 bolts around the cover and the penion bolts in from the front too. If any one could help I would appreciate it. I took pics with my phone but it wont let me send them for some reason.

1969 GMC · 10-17-2004, 12:40 AM

Chuck,
both the 3/4 and 1 tons had the 14 bolt rearend. The 1 tons had narrower perch spacing, but I am unsure of the measurement. What front axle did you get? If it is a dana 60, then it was a 1 ton.

smokkey1 · 10-17-2004, 09:13 PM

1 ton 40.5" center spring to center spring
3/4 ton 42.5" center spring to center spring

I bought an 1 ton 14 FF yesterday with 4.10's and open carrier for $85
but I need to move the spring perches and shock mounts since it's going in my 3/4 ton sub.

toddol1971 · 10-18-2004, 04:16 PM

Quote:

Originally Posted by soleeagle

The other day I ran into an old freind. We got to talking about our vehicles and I had told him I was looking to fine a set of 3/4 ton axles. He told me that he had a truck with a busted tranny and trasfer case sitting in his yard. I ask him what he wanted for it and his reply was, "If I could find some one to pull the motor out of it they could just have the rest of the truck". I told him I was his guy and today we pulled it to the shop and went to work. In about 45 minutes I had the motor out. I Got the axles out tonight ad found that they have 4:10 gears in them. I do have a question, how do I tell the difference from a 3/4 ton and a 1 ton rear? The brake drums just look a little big to be 3/4 to me. I am guessing that it is a GM 14 bolt but not sure how to tell the difference. If any one could help I would appreciate it. I took pics with my phone but it wont let me send them for some reason.

this is your quote "and the penion bolts in from the front too.It does have 14 bolts around the cover " This tells me that you have an eaton ho52, or ho72. I want to say this is the origonal 14 bolt. someone will correct me if im wrong on the origonal 14 bolt part. Hopefully it has a no spin.

smokkey1 · 10-18-2004, 04:51 PM

does your axle look like this?

soleeagle · 10-18-2004, 11:58 PM

Quote:

Originally Posted by smokkey1

does your axle look like this?

Your pic dosnt show up, so I cant answer that.

1969 GMC · 10-19-2004, 01:17 AM

if it has 14 bolts holding the diff cover on, then its a 14 bolt for sure.
Eaton H052/72 only had 10 bolts in an uneven pattern, plus the Eaton's diff is round and has a dropout third.
However they both have 14 bolts holding the ring gear to the carrier.

Mudder · 10-19-2004, 01:42 AM

Heres his pic.....

toddol1971 · 10-19-2004, 07:19 AM

Yeah mudder thats probably the one he has. when he said the pinion bolts in from the front, I just thought he meant the 3rd member. Sorry if i caused any confusion. Can anyone answer whether the eatons were considered the origonal 14 bolts or not? thanks Todd

**JIMs70GMC** · 10-19-2004, 06:42 PM

Todd, the eatons-H072/H052 were the predessecors(sp?) to the 14 bolt which appeared in 1973, the eatons were used from I believe 1947-1972.

soleeagle · 10-19-2004, 11:31 PM

Quote:

Originally Posted by Mudder67

Heres his pic.....

Yep thats what it looks like. Thanks for all the info everyone. I am still learning about some of these things.

smokkey1 · 10-20-2004, 12:15 AM

Quote:

Originally Posted by soleeagle

Yep thats what it looks like. Thanks for all the info everyone. I am still learning about some of these things.

cool. now if it's an open carrier you can drop in an detriot.

http://www.off-road.com/chevy/tech/detroit/

**JIMs70GMC** · 10-20-2004, 11:03 AM

good article!

10-16-2004, 10:15 PM	#1
soleeagle Registered User Join Date: Sep 2003 Location: Shelbyville, Indiana Posts: 614	The Big Score The other day I ran into an old freind. We got to talking about our vehicles and I had told him I was looking to fine a set of 3/4 ton axles. He told me that he had a truck with a busted tranny and trasfer case sitting in his yard. I ask him what he wanted for it and his reply was, "If I could find some one to pull the motor out of it they could just have the rest of the truck". I told him I was his guy and today we pulled it to the shop and went to work. In about 45 minutes I had the motor out. I Got the axles out tonight ad found that they have 4:10 gears in them. I do have a question, how do I tell the difference from a 3/4 ton and a 1 ton rear? The brake drums just look a little big to be 3/4 to me. I am guessing that it is a GM 14 bolt but not sure how to tell the difference. It does have 14 bolts around the cover and the penion bolts in from the front too. If any one could help I would appreciate it. I took pics with my phone but it wont let me send them for some reason. __________________ Chuck '85 Chevy Silverado 4X4 '91 Chevy 4X4 Suburban http://www.cardomain.com/memberpage/545941

10-17-2004, 12:40 AM	#2
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	Chuck, both the 3/4 and 1 tons had the 14 bolt rearend. The 1 tons had narrower perch spacing, but I am unsure of the measurement. What front axle did you get? If it is a dana 60, then it was a 1 ton. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

10-17-2004, 09:13 PM	#3
smokkey1 Land Beast Join Date: Nov 2003 Location: Los Angeles Posts: 134	1 ton 40.5" center spring to center spring 3/4 ton 42.5" center spring to center spring I bought an 1 ton 14 FF yesterday with 4.10's and open carrier for $85 but I need to move the spring perches and shock mounts since it's going in my 3/4 ton sub. __________________ 90' GMC 1 Ton Suburban

10-18-2004, 04:51 PM	#5
smokkey1 Land Beast Join Date: Nov 2003 Location: Los Angeles Posts: 134	does your axle look like this? __________________ 90' GMC 1 Ton Suburban

10-19-2004, 01:17 AM	#7
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	if it has 14 bolts holding the diff cover on, then its a 14 bolt for sure. Eaton H052/72 only had 10 bolts in an uneven pattern, plus the Eaton's diff is round and has a dropout third. However they both have 14 bolts holding the ring gear to the carrier. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

10-19-2004, 01:42 AM	#8
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,336	Heres his pic..... Attached Images

10-19-2004, 07:19 AM	#9
toddol1971 Registered User Join Date: Nov 2003 Location: plainfield il Posts: 163	Yeah mudder thats probably the one he has. when he said the pinion bolts in from the front, I just thought he meant the 3rd member. Sorry if i caused any confusion. Can anyone answer whether the eatons were considered the origonal 14 bolts or not? thanks Todd __________________ All my trucks are gone now. I'll gladly take a free one

10-19-2004, 06:42 PM	#10
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Todd, the eatons-H072/H052 were the predessecors(sp?) to the 14 bolt which appeared in 1973, the eatons were used from I believe 1947-1972. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

10-20-2004, 11:03 AM	#13
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	good article! __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm



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