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Old 10-01-2014, 12:40 PM   #1
love trucks
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Question 62 1/2ton automatic trans what rearend ratios??

62 1/2 ton automatic trans what rearend ratios came stock? and they are front chunks are they the same as 55-57 chevy passanger cars?
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Old 10-02-2014, 12:32 AM   #2
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Re: 62 1/2ton automatic trans what rearend ratios??

You might be lucky and have 3.38 gears, but most of the '55-'62 trucks had 3.90 gears. No the Eaton HO32 is not the same as the '55-'64 car differential. The Eaton HO32 was used from '55 second series thru '62 in the 1/2 ton trucks.
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Old 10-02-2014, 02:17 AM   #3
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Re: 62 1/2ton automatic trans what rearend ratios??

62 Impalas had 3:08 with automatic and 3:36 with 3 on the tree.
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Old 10-02-2014, 10:59 AM   #4
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Re: 62 1/2ton automatic trans what rearend ratios??

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62 Impalas had 3:08 with automatic and 3:36 with 3 on the tree.
??? and just what does that have to do with the truck rear ends????
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Old 10-02-2014, 11:45 AM   #5
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Re: 62 1/2ton automatic trans what rearend ratios??

https://gmheritagecenter.com/docs/gm...olet-Truck.pdf

3.90 or 4.11. 3.38 was only available with a manual trans.
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Old 10-02-2014, 01:21 PM   #6
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Re: 62 1/2ton automatic trans what rearend ratios??

anybody ever seen a 3.38 from the factory?
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Old 10-02-2014, 06:11 PM   #7
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Re: 62 1/2ton automatic trans what rearend ratios??

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??? and just what does that have to do with the truck rear ends????
Just a reference. Some people just absorb info. Not you apparently.
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Old 10-03-2014, 08:37 PM   #8
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Re: 62 1/2ton automatic trans what rearend ratios??

Thank you. I was told I can check the ratio by somehow marking the tire and the trans mission yoke and turn tire. not sur of the process if you have any info that would help please send.
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Old 10-03-2014, 11:12 PM   #9
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Re: 62 1/2ton automatic trans what rearend ratios??

Why not just pull the cover and have a look. I almost guarantee that the oil needs changed. It'll just cost you a cover gasket, a couple quarts of gear oil and a little time. Then you'll know exactly what gears you have and the peace of mind knowing that your differential has fresh oil and what the condition is inside.
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Old 10-03-2014, 11:46 PM   #10
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Re: 62 1/2ton automatic trans what rearend ratios??

Quote:
Originally Posted by GVDobler View Post
Just a reference. Some people just absorb info. Not you apparently.
Actually, I think that statement only applies to cars with the 250HP 327...
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Old 10-07-2014, 01:14 PM   #11
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Re: 62 1/2ton automatic trans what rearend ratios??

Quote:
Originally Posted by Captainfab View Post
Why not just pull the cover and have a look. I almost guarantee that the oil needs changed. It'll just cost you a cover gasket, a couple quarts of gear oil and a little time. Then you'll know exactly what gears you have and the peace of mind knowing that your differential has fresh oil and what the condition is inside.
No cover it is a front chunk rear end.
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Old 10-07-2014, 10:46 PM   #12
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Re: 62 1/2ton automatic trans what rearend ratios??

The '55-'62 Eaton HO32 differentials have both a removable 3rd member and a rear cover.
If it doesn't have a removable rear cover it is not an original differential to your truck.

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No cover it is a front chunk rear end.
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