axles

[lancer]

I have decided that i would like to go with the 14 bolt semi-floating. my question is, what truck would have the 14 bolt rear with the 6 lug wheels and the 4.10 gears with the open diff so i could add a locker. I would really like to have front and rear 4.56 with the 6 lug. so what trucks should i be looking for. any help would be greatly appriciated. thanks
one more question will that axle work with 15" wheels?

 

[73redblaze]

the chevys with an inline 6cyl usually have 14b with 4.56's stock, but there gonna be 8 lug more than likely. thats all i know that have 4.56 gears stock, other than military trucks which have 4.56 gears and a detroit locker, but also 8 lug. i would recomend going to 8 lug, the studs are thicker so you wont break them like i did... many times. also you should get a 14b ff not a semi. you can still lock a ff. just my .2

 

[73redblaze]

oh and yea i run 15"s with my 14b ff. and it has a stock gov lock. with 4.10s

 

[Hogback Fabrication]

6 lug semi-floating 14 bolts are found under "light duty" 3/4 ton trucks, there aren't all that many of them out there (the 8 lug SF and FF 14 bolts are MUCH more common).

You will almost certainly need to buy and setup aftermarket gears if you want 4.56 or lower, 4.10's are generally the lowest gears you will find.

As for open vs. gov-lok, it will depend on the options the specific truck had. You won't really know what the diff has until you pull the diff cover.

 

[lancer]

bolt-on?

will the axles be a bolt on affair? and what years and model of trucks do i look for? i guess i should switch to the 14ff with 4.10 gears. thanks my blazer is an 86

 

[h0wl0ngcanitbe]

the chevys with an inline 6cyl usually have 14b with 4.56's stock, but there gonna be 8 lug more than likely. thats all i know that have 4.56 gears stock, other than military trucks which have 4.56 gears and a detroit locker, but also 8 lug. i would recomend going to 8 lug, the studs are thicker so you wont break them like i did... many times. also you should get a 14b ff not a semi. you can still lock a ff. just my .2

x2 sounds like you just described any one of the military trucks that come with all that like an M1009 IIRC and that has all that you want except its an 8lug, did ya wanna keep the 6 lug for a specific reason?

 

[lancer]

i just didn't want buy new wheels, but that isn't that much of an issue. i can find someone to buy my 15x10 aluminium wheels.
so i need to find a military truck to make it a bolt in affair?

 

[cuervo]

i just didn't want buy new wheels, but that isn't that much of an issue. i can find someone to buy my 15x10 aluminium wheels.
so i need to find a military truck to make it a bolt in affair?

The spring perch on a 1009 or 1010 are not the same spacing as your 86 blazer. You will to weld on some new ones at the correct witdh.

 

[h0wl0ngcanitbe]

The spring perch on a 1009 or 1010 are not the same spacing as your 86 blazer. You will to weld on some new ones at the correct witdh.

Im sure many would agree it would be worth it, i wrestled with the idea alot. i came to the conclusion that if i was gonna do all that work anyways the bit of necessary work would be nothin compared to the benefit. but i must admit that i wont be doin it for a while cause i just rebuilt my 10bolts, but thats just what id do.

 

[dyeager535]

will the axles be a bolt on affair? and what years and model of trucks do i look for? i guess i should switch to the 14ff with 4.10 gears. thanks my blazer is an 86

You can find the 14SF with 6 lugs in the '88+ trucks.

The cover/center section is distinctive, you can easily tell a 14SF from the rear.

Will need to move the spring perches, but that's about it. Your truck, if it has the e-brake cables running down the drivers side then splitting near the axle, will accept the e-brake on the 14SF's.

 

[AJMBLAZER]

So much bad information here:

The M1009 CUCV Blazer has standard 6 lug 10 bolts with 3.08 gears and a Gov-Bomb in the rear. Nothing special there. Only the trucks got the 4.56 geared one ton axles.



The 6 lug 14SF was available under the 2500LD trucks from 88-to sometime in the late 90's. Not sure if that package survived all the way to the end of that body style in 2000. I personally have never seen one newer than 1994.
SOME half tons of the same era got them as well. Some random combination of options and weight ratings would get it. We discussed this several years ago over on the Off-Road.com/Chevy forum and never did come up with an identifiable trend about how they ended up under the half tons. At any rate we did note that every half ton with the 6 lug 14SF had the "F44" option code.

Now finding one without a G80 Grenade Lock and with 4.10 gears...good luck.


www.Car-Part.com your search should start there.

 

[dyeager535]

Most of the 14SF 6 lugs I've seen are 3.73's. The next "step up" in GM light truck gearing is 4.10. Doubt that it's REAL uncommon to have that ratio, but it should be out there. I'll go check.

Go figure, it's not clear in the online literature I can find from GM.

As an example, a 1996 3/4 ton 4WD Suburban had a semi float axle (I ASSuME it's a 14SF as I'm not sure GM ever put 4.10's in a truck 8.5" diff), while a 2wd 3/4 ton got the full float. The 4WD axle was 4.10, and the 2WD was 3.73.

As I recall the 4WD 3/4 tons early on at least ('88-later) got 6 lug axles. So I'd think some of the 3/4 ton Suburbans around that time frame, to be 4.10 14SF's.

 

[cuervo]

So much bad information here:

The M1009 CUCV Blazer has standard 6 lug 10 bolts with 3.08 gears and a Gov-Bomb in the rear. Nothing special there. Only the trucks got the 4.56 geared one ton axles.

You are correct. I did mean the truck, M1008s and the M1010 ambulance. The M1009 is just standard 10 bolts.

Thanks for fixing that. I'd hate for him to buy the 1009 thinking he would get the 1 1/4 axles.


edit

here's a site that has some basic info on CUCVs http://www.steelsoldiers.com/CUCV%20Stats.htm

/edit

 

[AJMBLAZER]

Most of the 14SF 6 lugs I've seen are 3.73's. The next "step up" in GM light truck gearing is 4.10. Doubt that it's REAL uncommon to have that ratio, but it should be out there. I'll go check.

When we did our research and "polling" a few years ago we found it was more common to end up with a 3.73 or higher ratio in the half tons and 2500LD's.

Go figure, it's not clear in the online literature I can find from GM.

As an example, a 1996 3/4 ton 4WD Suburban had a semi float axle (I ASSuME it's a 14SF as I'm not sure GM ever put 4.10's in a truck 8.5" diff), while a 2wd 3/4 ton got the full float. The 4WD axle was 4.10, and the 2WD was 3.73.

Yep, it'd be a 8 lug 14SF or 14FF under a 3/4 ton Suburban. GM never put anything else under the rear 3/4 ton Suburbans from 73 to present. However that's outside the scope of this discussion as there never was anything other than truck 2500LD's. We also never turned up any evidence of a 6 lug 14SF under anything other than a 1/2 ton or 2500LD. No Blazers/Tahoes/Yukons or Suburbans.

As I recall the 4WD 3/4 tons early on at least ('88-later) got 6 lug axles. So I'd think some of the 3/4 ton Suburbans around that time frame, to be 4.10 14SF's.

2500LD trucks = 6 lug 14SF
2500 trucks and Burbs could be either 8 lug 14SF or 14FF depending on the GVWR.

 

[Big Blzn]

*small hijack* It has been discussed before, but I couldn't find it, but with a 14bff that has a gov-lock is there really a good possibility that with moderate wheeling it is easy to grenade? I thought that it was mostly the 10bolts with the gov-locks were the real weak ones. Unless I absolutely abuse my 14bff with it's gov-lock I should be fine right?
Hoby

 

[AJMBLAZER]

The 14FF Gov Lock has the reputation of being a better unit as it's much larger, in a better carrier, and a different design than the common and problematic 10/12 bolt ones.