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  #1  
Old June 28th, 2020, 09:19 AM
teking teking is offline
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Default Rear Axle question ....

Ive read the axle thread a 100 times ..... lots of options .. so now Im confused.
Can someone tell me if this rear can be made to work in the M715 with a disk conversion?


1990-1991-Chevy-GMC-3500-Pickup-Rear-Axle-Assembly-4-10-Ratio-4x4-OEM

IT WORKS ON THE FOLLOWING VEHICLES

CHEVROLET 3500 PICKUP 90-91 4x4; model VIN V, DRW, 14 bolt cover, 4.10 ratio (opt GT5)
GMC 3500 PICKUP 90-91 4x4; model VIN V, DRW, 14 bolt cover, 4.10 ratio (opt GT5)


also ....

1988 89 Chevy 3500/GMC 3500 Pickup Rear Axle Assembly 4.10 Ratio

IT WORKS ON THE FOLLOWING VEHICLES

GMC 3500 PICKUP 88-89 4x2; model VIN C (5th digit), DRW, 4.10 ratio (opt GT5)
CHEVROLET 3500 PICKUP 89 4x2; model VIN C (5th digit), DRW, 4.10 ratio (opt GT5)
GMC 3500 PICKUP 88-89 4x4; model VIN K (5th digit), DRW, 4.10 ratio (opt GT5)
CHEVROLET 3500 PICKUP 88 4x2; DRW, 4.10 ratio (opt GT5)
CHEVROLET 3500 PICKUP 88 4x4; DRW, 4.10 ratio (opt GT5)
CHEVROLET 3500 PICKUP 89 4x4; model VIN K (5th digit), DRW, 4.10 ratio (opt GT5)

Last edited by teking; June 28th, 2020 at 01:00 PM.
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Old June 29th, 2020, 03:05 AM
ray steadward ray steadward is offline
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You really need to measure the width between the brakes and see if it will clear the leaf springs...The wide g-van rears are good for that.
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Old June 30th, 2020, 09:16 AM
teking teking is offline
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Thanks Ray ... I'll think I'll just go with Hillbilly Wizard. They have the M715 measurements and will build me anything I want shipped to my door. I'm going to go with a D60 up front and D70 in the rear, four wheel disk, with the detroit locker in the rear. We are discussing gearing. 4.10 r 4.56. I have 4.56 now and I'm happy with those. So probably 4.56 based on a 37/38 tire. I'd like to run H1 12 bolts.
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Old June 30th, 2020, 10:54 AM
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How much are those custom rear axles running?
Without a tape measurement, and all the variations from the factory “standard” axles it seems like a crap-shoot on getting the right width.
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Old June 30th, 2020, 11:20 AM
teking teking is offline
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You'd think but he's done a number of M715s and he working with my mechanic to validate measurements. And yes they are spendy but they will be dead on new with modern components and plug-and-play when they arrive. Sometimes you gotta pay to play. With the way it is now I spend more time fixing it than driving it. I'd rather be at the range than in the garage.

Last edited by teking; June 30th, 2020 at 11:47 AM.
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Old June 30th, 2020, 05:53 PM
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I agree! I meant the standard numbers from GMC/Chevy/Dodge seem to be different depending from year to year, make and model that it can be difficult to rely on axles actually fitting according to the “axles that fit.” I should have written my response better. I would love to buy a custom axle for sure!
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Old July 4th, 2020, 10:20 AM
teking teking is offline
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Default Custom axles with H1 Hummer wheels & tires

Please check my sanity:

The stock WMS is:

73.5" front
72.5" rear

I run a 10" 16.5 with 5" BS - 37x16.5 H1 tires so backside of rim to rim is:

63.5" front
62.5" rear

I'm assuming the following:

Dana 60 DRW front axle w/ hubs to 77.5"
Dana 70 DRW rear axle w/ hubs to 77.5"

Stock H1 Hummer rims are 9" 16.5" with 7" BS so so backside of rim to rim is:

63.5 front
63.5" rear

Almost exactly the same tire placement as I have now .... Am I right?
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Old July 14th, 2020, 04:53 PM
Kacz7895 Kacz7895 is offline
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Just curious how much was the rear axle thinking on doing the same for the front and rear
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Old July 17th, 2020, 09:04 AM
teking teking is offline
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The rear was roughly 3K with disk brakes, D70 4.56 gears. It also has a Detroit locker but i expec tg that may cost me extra. Havent gotten the official final number.

UPDATE: so $2825K for the axle with disk brakes 77.5 WMS to WMS plus $700 for the locker, then tax , mounting hardware, etc.

Last edited by teking; July 19th, 2020 at 12:09 PM. Reason: add locker info
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Old August 4th, 2020, 04:04 PM
Kacz7895 Kacz7895 is offline
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So I have a 725 I'm assuming these axles will work for me. If so can I call the guy and ask him to build me some
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