Which late model truck axle will fit a '69. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**desert-rat** · 10-17-2019, 05:44 PM

For my '69 GMC 3/4 ton leafs with 8 lugs.

Thanks

**AMERICAN PICK-UP** · 10-21-2019, 02:43 PM

I used a 2002-2010 2500 HD 14 bolt full float rear axle under my 1970 gmc 3/4 ton.. they are 14 bolt 8lug 10.5 ring rear, disc brakes are pretty cheap.. you will have to move the spring pads and at least one shock mount..

ElKotze · 10-21-2019, 07:31 PM

On my 69 I used a 14 bolt semi-floating rear with a 9.5 ring gear from a 80's square body 3/4 or 1-ton, I had to move the spring perches and the shock mounts, but that is fairly easy. U-joints are the same, overall a very easy swap, parts are readily available and many gear sets to choose from, I'm running 3.56 in mine.

ElKotze · 10-21-2019, 07:37 PM

You wrote it's for your GMC 3/4 ton, most of them came with Dana 60's and those are excellent rear ends, just fyi.

Mike C · 10-21-2019, 07:44 PM

One challenge with swapping in a later axle is do you want all your lug nuts to match? In '71 they went to 9/16" lug studs and in '88 they went to 14mm.

If you are planning a disc swap, those are 9/16" and get you a donor up to '87. I too am a fan of the semi-float 14 as an excellent value that is as strong as the Dana 60 in terms of ring and pinion.

10-17-2019, 05:44 PM	#1
desert-rat Senior Member Join Date: Jan 2013 Location: 3,018 feet above the SoCal/Mojave Desert region. Posts: 349	Which late model truck axle will fit a '69. For my '69 GMC 3/4 ton leafs with 8 lugs. Thanks

10-21-2019, 02:43 PM	#2
AMERICAN PICK-UP Senior Member Join Date: Jul 2012 Location: paragould,arkansas Posts: 855	Re: Which late model truck axle will fit a '69. I used a 2002-2010 2500 HD 14 bolt full float rear axle under my 1970 gmc 3/4 ton.. they are 14 bolt 8lug 10.5 ring rear, disc brakes are pretty cheap.. you will have to move the spring pads and at least one shock mount..

10-21-2019, 07:31 PM	#3
ElKotze Registered User Join Date: Nov 2014 Location: Southwest Kansas Posts: 306	Re: Which late model truck axle will fit a '69. On my 69 I used a 14 bolt semi-floating rear with a 9.5 ring gear from a 80's square body 3/4 or 1-ton, I had to move the spring perches and the shock mounts, but that is fairly easy. U-joints are the same, overall a very easy swap, parts are readily available and many gear sets to choose from, I'm running 3.56 in mine. __________________ '64 C10 LWB, 283, 5speed '68 C20 LWB, 327, 4speed '69 C20 Custom Camper Longhorn, 350, 4speed '72 C20 Cheyenne Super, 396, TH400 '66 C60, 292, 4speed

10-21-2019, 07:37 PM	#4
ElKotze Registered User Join Date: Nov 2014 Location: Southwest Kansas Posts: 306	Re: Which late model truck axle will fit a '69. You wrote it's for your GMC 3/4 ton, most of them came with Dana 60's and those are excellent rear ends, just fyi. __________________ '64 C10 LWB, 283, 5speed '68 C20 LWB, 327, 4speed '69 C20 Custom Camper Longhorn, 350, 4speed '72 C20 Cheyenne Super, 396, TH400 '66 C60, 292, 4speed

10-21-2019, 07:44 PM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,709	Re: Which late model truck axle will fit a '69. One challenge with swapping in a later axle is do you want all your lug nuts to match? In '71 they went to 9/16" lug studs and in '88 they went to 14mm. If you are planning a disc swap, those are 9/16" and get you a donor up to '87. I too am a fan of the semi-float 14 as an excellent value that is as strong as the Dana 60 in terms of ring and pinion. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax



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