is this a good replace for my read axle ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

masaki · 04-09-2010, 12:44 AM

Hi, I found a chevrolet truck, it's for sale, I want to know if I can use the rear axle because my GMC Jimmy 73 rear axle is not the original, but, since the GMC is 4WD I want to know if the chevy truck is compatible...

hrere is the photos of the truck... (all I know is this si a 69 truck, 2WD, L6 250 engine, suspension front coils rear leaf)

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OARNGESI · 04-09-2010, 02:26 AM

Is the gear ratio the same whats with the bed is it on the stock frame

**nlped** · 04-10-2010, 10:35 AM

Grab you a tapemeasure and climb under it and take some measurements. i.e. spring perch center to spring perch center, shock mount center to shock mount center, and backing plate to backing plate. That will let you know if it will actually bolt in without modification.

Then you need to confirm the gear ratio in the Chevy rearend and the gear ratio in your GMC, because the GMC is 4WD, you have to stay with the same ratio that is in it now so it will match up with the front gear ratio. If they don't match it would destroy the transfer case having mismatched gear ratios.

I would really be suprised if they will match up, but maybe you will get lucky

. What is wrong with the rearend under the GMC now, other than not being the original one?

04-09-2010, 12:44 AM	#1
masaki Registered User Join Date: Feb 2010 Location: Lima / Lima /Peru Posts: 46	is this a good replace for my read axle ? Hi, I found a chevrolet truck, it's for sale, I want to know if I can use the rear axle because my GMC Jimmy 73 rear axle is not the original, but, since the GMC is 4WD I want to know if the chevy truck is compatible... hrere is the photos of the truck... (all I know is this si a 69 truck, 2WD, L6 250 engine, suspension front coils rear leaf) __________________ ------------------------------------ 1988 Ford taurus LX SW V6 3.0L vulcan - Axod 1973 GMC Jimmy Sierra 4x4 L6 diesel nissan LD28 (temporal engine) Last edited by masaki; 04-09-2010 at 12:54 AM.

04-09-2010, 02:26 AM	#2
OARNGESI Registered User Join Date: Sep 2008 Location: CASA GRANDE AZ Posts: 4,276	Re: is this a good replace for my read axle ? Is the gear ratio the same whats with the bed is it on the stock frame __________________ 70 SWB STEPSIDE 70 BLAZER 09 challenger

04-10-2010, 10:35 AM	#3
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: is this a good replace for my read axle ? Grab you a tapemeasure and climb under it and take some measurements. i.e. spring perch center to spring perch center, shock mount center to shock mount center, and backing plate to backing plate. That will let you know if it will actually bolt in without modification. Then you need to confirm the gear ratio in the Chevy rearend and the gear ratio in your GMC, because the GMC is 4WD, you have to stay with the same ratio that is in it now so it will match up with the front gear ratio. If they don't match it would destroy the transfer case having mismatched gear ratios. I would really be suprised if they will match up, but maybe you will get lucky . What is wrong with the rearend under the GMC now, other than not being the original one? __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha



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