M1009 axles under a M1008

helm1008, firstly welcome to Steel Soldiers. At the menu bar near the top you click on "Forum" and scroll down to the forum you want to post in. Click that and at the top of the forum will be an area saying something like "Start New Thread" CLick that and have at it. Some forum ettiquette for you. Make the title of the thread very relevant to the subject of the thread. It helps for later searches. Example, if you are restoring an M1008 don't title it as "Look What I did" or something not really related. Also we ask that you make an honest effort to use capitalization and punctuation. It really helps keep the site neat and orderly and easy to read and search.

Again, welcome aboard.

More specifics on axles. The 12 bolt rear was only used in half tons and was used from 69 thru 80. In 81 the half tons started getting the 10 bolt. The same 10 bolt that the M1009s got. For emission reasons (and probably a few others) the M1009 was rated as a 3/4 ton despite the fact that then entire driveline was 1/2 ton. The Dana 44 front was use from 1960 (first year GM had factory 4 wheel drive) through 1976. In 1977 the transition got under way. They designated a 77 first design and 77 second design. As you might expect, the 2nd design was the intro of the 10 bolt front. Most parts outside the carrier were interchangeable with the exception of the inner axle shafts. There is much more with spindles and backing plates and such and we can cover that later. Hope this helps.

Thanks

http://www.steelsoldiers.com/showthread.php?120597-My-85-M1008-restoration-project

Wait, nobody has said it?














WHAT A JUNKER!

Yes, What a Junker...

FMJ said:

The K10/1500 pickups and Blazers of that series all have the same spring perch locations. The 3/4 ton and up trucks have the wider locations so unless you relocate the perches. . .

Also, not sure how common a 3.08 gear in a 3/4-1 ton were. . .

Click to expand...

They are k10's & k20's.

The 1/2 ton & 3/4 ton spring perches are the SAME, only the 1 tons are different.

The 1tons have a NARROWER width & shock mounts are opposite.

Go with the 1/2 ton axles.

You aren't gonna hurt them with a 6.2

86m1028 said:

They are k10's & k20's.

The 1/2 ton & 3/4 ton spring perches are the SAME, only the 1 tons are different.

The 1tons have a NARROWER width & shock mounts are opposite.

Click to expand...

Reading is fundamental. . . .

Someone removed the stock axles and installed a 44 in the front and a 12 bolt in the rear and it may not be GM. It's a weld job hack.
Are the 1 ton frames different? Just trying to figure out why the springs are different widths.

What are the ratios?

No clue.

pics?

Frames do have some differences. Springs are inboard and shock placement revised because the 1 tons could be ordered with dual wheels. The cab chassis axle is very narrow and the tires barely clear the springs.

Westech said:

Someone removed the stock axles and installed a 44 in the front and a 12 bolt in the rear and it may not be GM. It's a weld job hack.
Are the 1 ton frames different? Just trying to figure out why the springs are different widths.

Click to expand...

NOTE: This is comparing 1/2-3/4 ton truck frames to 1ton truck frames (rear springs).
Frame rails are same width apart BUT 1 ton frames have narrower rear spring mounts (springs sit closer to frame rails).

ALSO note 1/2-3/4 tons, shocks are outside frame rails
1 tons are inside frame rails & are opposite.

Fronts are direct swaps.

As you can see the rear is a 8 lug 14 bolt cover. Also not centered (though it was a 12 in the dark) correctly at all!!
Front looks like a Dana 44 from what I see. 3 bolt steering arm like the stock m1009 axles. But it also has 8 lugs.
I have not one clue on ratios.

Westech said:

View attachment 480130View attachment 480131View attachment 480132View attachment 480133View attachment 480134
As you can see the rear is a 8 lug 14 bolt cover. Also not centered (though it was a 12 in the dark) correctly at all!!
Front looks like a Dana 44 from what I see. 3 bolt steering arm like the stock m1009 axles. But it also has 8 lugs.
I have not one clue on ratios.

Click to expand...

The front looks like a 10 bolt.

Rear looks to be a semi floating 14 bolt.

Haha, that's funny. Both are correct, 10 bolt 3/4 ton front and semi floating 14 bolt rear. What makes me chuckle is that they only relocated one perch to get it to fit, that's why it's off to one side so much. I think Doghead and Stretch were right!

So a Set of 1987 Chevy Silverado V10 6 lug axles will fit back under an m1008, Hmmm.

SouthernSteel said:

So a Set of 1987 Chevy Silverado V10 6 lug axles will fit back under an m1008, Hmmm.

Click to expand...

Frt is direct swap
rear = moving spring perches, shock mount & cross over u-joint.