10 to 14 bolt SF swap - Quick Questions

[DerekTheGreat]

Durr yeah why didn't that occur to me?

 

[DeucesAllin]

Durr yeah why didn't that occur to me?

Honestly... before you turn a wrench look at a newer unit.

same work. more options.

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[DerekTheGreat]

Newer unit? As in from a GMT 800? Completely new to me but I'm listening...

 

[DeucesAllin]

Newer unit? As in from a GMT 800? Completely new to me but I'm listening...

I cant do it FOR you.

idk whar your payong...but if your doing one, why not get something newer, with bigger brakes?

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[DerekTheGreat]

I'm not expecting you to pull the axle, just share your knowledge on what to look for. If I knew, I wouldn't post a thread..

This yard wants $99.99 for a rear axle with drummies and $119.99 for one with discs. So pretty cheap really. I already saw the bigger drums as an upgrade in the brake department, but if you know something that'll be a drop in replacement with discs or better drums, please let me know and maybe I'll reconsider or pull this axle for the experience and then wait until I find what you mention.

 

[DeucesAllin]

I'm not expecting you to pull the axle, just share your knowledge on what to look for. If I knew, I wouldn't post a thread..

This yard wants $99.99 for a rear axle with drummies and $119.99 for one with discs. So pretty cheap really. I already saw the bigger drums as an upgrade in the brake department, but if you know something that'll be a drop in replacement with discs or better drums, please let me know and maybe I'll reconsider or pull this axle for the experience and then wait until I find what you mention.

thats a screaming deal...

I finished a 2wd GMT 400 earlier this year...went with a 97(?) 6 lug SF and 456 gears from a 2wd (4wd is narrow).

Then used 5 to 6 lug adapters in front to bring the wheels flush.

16" ralleys cleared the disks, parking break was easy.

You dont need a thread to search.





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[DerekTheGreat]

Right, I figure even if I don't end up using the axle the experience is nice and I could sell it for at least double what I paid for it.

I did search, like my first post mentioned I gathered what to look for, how to spot one, the RPO codes that matter and noted I needed a 4wd axle since they're shorter like you mentioned but also need to pull one from a half ton truck because of potential yoke differences. But I didn't see any answers to the questions I had so that's why I created my own thread. I could try searching again, as I don't remember seeing anything about what years got disc brakes. I assumed those didn't happen until the GMT800 came on the scene. Disc brakes are dandy but I don't mind drummies. Because the way I see that swap means I might as well get the right master cylinder, make sure to take the proportioning valve and such. About all I know about the 1995+ trucks is that they got true 4 wheel ABS, updated interior and Vortec '96+..

 

[DeucesAllin]

Right, I figure even if I don't end up using the axle the experience is nice and I could sell it for at least double what I paid for it.

I did search, like my first post mentioned I gathered what to look for, how to spot one, the RPO codes that matter and noted I needed a 4wd axle since they're shorter like you mentioned but also need to pull one from a half ton truck because of potential yoke differences. But I didn't see any answers to the questions I had so that's why I created my own thread. I could try searching again, as I don't remember seeing anything about what years got disc brakes. I assumed those didn't happen until the GMT800 came on the scene. Disc brakes are dandy but I don't mind drummies. Because the way I see that swap means I might as well get the right master cylinder, make sure to take the proportioning valve and such. About all I know about the 1995+ trucks is that they got true 4 wheel ABS, updated interior and Vortec '96+..

Carefull on "might as well" builds... they end up never finished for many.

The yoke is the least of your concerns, once you have the unit, post a pic of the ends your trying to mate and the forums will help.

If I were you, I would find an axle with your dream gear, swap it, and never look back.

If I do a gmt400 again I would do a SF rear and parts store front brakes from newer model PPV tahoe.

If your okay with a cutoff wheel or torch...I would probably use a gmt900 Suburban or Tahoe axle as they have huge rear brakes compared to your current fronts.

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[DeucesAllin]

Also... the newer AAM sf 14 bolts from GM and Dodge are internally interchangable, and have tons of tone ring options.


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[DerekTheGreat]

Exactly, I never intended on swapping the 10 bolt but mostly because I never expected to find the donor truck but here it is... That and upgrading to larger drums and a G80 sounds appealing.

I feel I'm happy with the 3.73's actually. I rarely take the tach past 2500 rpm.. The truck sees a lot of freeway action and sports stock wheels & tires. Since it's a 4x4 I'd have to regear the front too and I was looking to nab the rear, send it to the shop down the street, get it back, do the brakes myself and then throw it on.

I suck pretty bad with a cutoff wheel and haven't used a torch in probably 15 years. Pretty much a novice who knows just enough to be.. umm I'll leave that for anyone's interpretation haha. That's one of the reasons I typically don't get involved in "big" jobs as past experience shows they snowball and the last thing you want to do is get into a project with what was supposed to be a DD.