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05-08-2019, 09:05 PM | #1 |
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Join Date: Mar 2019
Location: Los Angeles Ca
Posts: 14
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1970 GMC 3/4 ton Axle Stamp Info?
Anyone have info as to what my diff gears are with the axle
stamp? My truck is a 1970 GMC 3/4 ton. The stamp reads.... 58 OC1 603051 6 5 19 70 A7 |
05-08-2019, 10:34 PM | #2 |
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Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,727
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Re: 1970 GMC 3/4 ton Axle Stamp Info?
Most 3/4 ton GMC trucks had Dana 60 rears. If yours does, if no one has removed it, it will have a tag between two of the diff cover bolts that has the ratio on it.
Gotta' love Dana for doing that and you have to hate PO's for removing it...
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05-08-2019, 10:48 PM | #3 |
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Join Date: Mar 2003
Location: Colfax-California
Posts: 8,628
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Re: 1970 GMC 3/4 ton Axle Stamp Info?
BOM 603051-6 =1969-1970 coil sprung rear, 4.10 gearing, with a power-loc
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05-09-2019, 12:23 AM | #4 |
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Join Date: Mar 2019
Location: Los Angeles Ca
Posts: 14
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Re: 1970 GMC 3/4 ton Axle Stamp Info?
It does still have the tags. I’ll check tomorrow to see what the is stamped on them.
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05-09-2019, 01:10 AM | #5 |
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Join Date: Mar 2003
Location: Colfax-California
Posts: 8,628
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Re: 1970 GMC 3/4 ton Axle Stamp Info?
One tag will say limited slip and the other 4.10
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