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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2007 Posts: 29 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2007 Posts: 29 | 1953 chevy 3800 1 ton with an eaton axel. But what one is it?WHat came in these trucks from factory?? It is a dual wheel by the way. | | | | | Joined: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | It's an Eaton HO72 probably 5.14 ratio.
What do ya have in mind???
Denny Graham
Sandwich, IL
Denny G
Sandwich, IL
| | | | | Joined: Aug 2007 Posts: 29 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2007 Posts: 29 | I want to update gear ratio. I have been reading that you can use Chevy 14 bolt rear end parts and that Detroit locker in this rear end if you use 14 bolt axles also. Anyone done so? | | | | | Joined: Feb 2004 Posts: 29,842 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,842 | Nope, can't be done! The internal parts are totally diferent. The 14 bolt axle might swap as a complete unit, but they're way too wide. The 3/4 ton trucks with that rear end ran a 4.56 ratio, and there were a VERY few 4.10's out there behind automatic-transmission 3/4 tons. They're scarce as hens' teeth, and much more expensive! There was a Detroit Locker option in thre early 70's, but that carrier is almost nonexistent now. Most of them went into dirt track race cars in the late 70's/early 80's.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Aug 2007 Posts: 29 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2007 Posts: 29 | Ok I opened it up, I find numbers as follows. gm 3682. 7/32 and 7/54 but it is only a 1 speed rear end. Am I right this is 4.56 rear end?? | | | | | Joined: Feb 2004 Posts: 29,842 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,842 | The 7/32 probably indicates number of gear teeth, 7 on the pinion, 32 on the ring gear. That divides out to be a 4.57:1 ratio. Since you're inside already, count the teeth and be sure.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | That be right Jerry, the ring gear stamps mean p.n. 3682104 7-32 (4.57 ratio), 7-54 (Jul, 1954).
And Jerry's also correct as fur as finding a 4.10, that would be the only option. Find a 1968-72 V8 auto C20-30 and it may have one.
Denny Graham
Sandwich, IL
Denny G
Sandwich, IL
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