3/4 Ton rear on K/10 Suburban?
 

I have a '67 K/10 Suburban. It's been sitting for some years. Six years ago I cannibalized the 12-Bolt Corp 3.73 Rear w/Auburn Posi and Moser axles off it to put on my '71 GMC Jimmy K/1500. The '67 rear fit on the '71, but I couldn't get the blown out [12-Bolt Corp 3.73 Eaton [factory] Posi Rear to fit on the Sub.
I'm wondering if I can fit a 14-Bolt 3.73 [non-posi] onto the Sub's springs?
Can I get 6 Lug axles made to fit a 14 Bolt? I saw a '74 14 Bolt in the PHX craigslist for not a lot of money.

Re: 3/4 Ton rear on K/10 Suburban?
 

a 14bolt out of a 73 up one ton has the correct spring pad width to bolt right up (40 inch) while a 3/4 ton will have wider pads at 42.5 inches. No six lug conversions that I am aware of though

You can use a semi floater 14 bolt with six lugs which is stronger than a 12 or 10 bolt but not a full floating axle. Not sure what the spring pad widths are on the semi floater are.

Re: 3/4 Ton rear on K/10 Suburban?
 

As far as I'm aware, anything half or three quarter ton is 42.5" spring perch width after 1973.

If I may so as ask, what are you planning on doing with the suburban? A 10 or 12 bolt is strong enough for a regular driver.

Re: 3/4 Ton rear on K/10 Suburban?
 

The original idea for the rebuild was as a tow rig for 20' Argosy [by Airstream] trailer. Sold the trailer. It has a 454/TH350/NP205/[-12-Bolt 3.73 Auburn Posi]. BBC had an engine fire. Needed rebuild. (Carb burn really.)
It was totalled by Farmers Insurance. Now I have the salvage title.
Looking at a new engine [diesel, 383, or turbo 292 ?], new tranny [700R4?] rebuild xfer case. Needs new rear axle since I stole the only good part that was on it for my GMC -- which I use for work.
A machinist I use, has a 7.4LS/ 4L8E for about $2700, but I'm afraid of the new school computerized stuff.
Maybe I'll get it running with a 292, as a light bomber. Hate to see it deteriorate.
Can Moser custom cut 6 lug axles for a 14 bolt free floater?

Re: 3/4 Ton rear on K/10 Suburban?
 

Like RedRoad mentioned, Gm did make a 6 lug version of the 14b semi float for the light duty three quarter tons, though the spring perch width is still going to be 42.5" and I do not know if the parts are the same as the 8 lug variant. http://www.fourwheeler.com/how-to/tr...rs-and-locker/

I though I read somewhere that you couldn't convert a full float to a 6 lug, I think the hubs are too big.

Re: 3/4 Ton rear on K/10 Suburban?
 

I guess that's what I needed to know, thanks.
It's all a lot simpler if I get the GMC's original 12 Bolt w/Eaton Posi rebuilt, and put it back on the Jimmy. Then the Sub get's it's own rearend back.

Re: 3/4 Ton rear on K/10 Suburban?
 

Just take the axles to a good machine shop and they can redrill them to a 6 lug pattern.

Re: 3/4 Ton rear on K/10 Suburban?
 

Some shops won't do it because one of the holes overlaps an existing hole and the existing hole has to be welded up. You wouldn't think it would be a big problem but I guess some of the shops are gun-shy because of the lawsuit mind set in this country these days....

LockDoc

Re: 3/4 Ton rear on K/10 Suburban?
 

Moser will cut axles to any configuration you order. But if my 6-Lug wheels won't fit the 3/4 T drum or rear hubs, then it's pointless.