7.5 rear end

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May 9, 2017 | 12:15 PM

dozierboi101

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7.5 rear end

need info on the rear end that will be a good fit for a 5.3 with 200,000 miles all stock

May 9, 2017 | 12:56 PM

Jimbo1367

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What car?

May 9, 2017 | 12:56 PM

1964SS

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From: Mesa, Arizona

I'm sure someone here can help, but we need to know what it's going into.

May 9, 2017 | 07:59 PM

rpturbo

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From: A-Town, Ill side

If its a GM, use a 8.5, if Ford use a 8.8. They made tons in each variety, different widths, and gears/brakes. Ford made the 8.8 in IRS as well as solid.

May 10, 2017 | 09:29 AM

gsjimmy

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Joined: May 2010

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From: So. WIS

7.5 / 7.625

The 7.5 will hold up for a while. All depends on your driving. 1 massive burnout on sticky tires, rearend will be done. Is this a G Body, H Body or S series truck? 7.5 or 7.625 was offered in all of these.

G body - look for a 8.5, came in wagons, 442 and Grand National. Not real common, but will just bolt in.

H Body - 7.5 replaced the 6.5 in late '75 on Vega, Monza and clones

S Series - 7.5 until late '88, then 7.65 and more important, 28 spline axles. The 4x4 and Blazers got 8.5, but different width. S Series and H body are 58" wide

You can upgrade the axles and internals (Moser and Strange) but will have diminishing return with the more power you put thru it.

Having said all this, I'm running a 7.625, Gov-Lok 3.42 gear in my S10 with out issues. Already sourced the 8.8 for it when the time comes.

Jim