WTB big parts

[crusier72]

After my breakage at the gathering I'm feeling like the rear cruiser axle isn't going to cut it with my driving style so I'm looking at narrowing an Eaton. For those that don't know they came in GM trucks pre 72ish and are the precursor to the 14Bolt. They are a full float 8 lug axle that were in the one ton and up mostly. I plan on re drilling the hubs to run my 6 lug wheels and with any luck find a Detroit for it.
I also would like to put a tcase that can do front burns like the dana 20 or 300.
I'm currently looking for an 4.11 ration Eaton HO72 in the northeast and a dana 20 with a 10 spline input so if anyone knows of or has these please let me know.
Mark

 

[AlxJ64]

Hey, if you haven't found any parts for the HO72, let me know. I've got a 4.57 open third member that I am trying to swap out for a 5.14 third member. If you know of any, or if I find one, would you be interested in buying my 4.57. I'm on the east coast though so shipping across the country for something thats a good 100lbs+ may be a bit pricey.

 

[JJS]

I'm not sure I'm following you here. Guys with 40's are having trouble breaking 40 rears with Poly shafts. Are you running a 454?

It just seems like it would be a lot of work for a minor upgrade in strength. I would check out the Poly Performance site, and price a set of rears.

 

[rblank]

I'm not sure why you're looking for a rare pre-72 axle. 14bolts are a dime a dozen and can be had for short money.

 

[Q-BALL]

On A Side Note Rblank Your Info Says 5.29's Locked/spooled Is That Locked Front Spooled Rear ???

 

[JJS]

I'm not sure why you're looking for a rare pre-72 axle. 14bolts are a dime a dozen and can be had for short money.

x2. The light duty GM 3/4 ton pickups in the late 80's to early 90's used a 9.5" ring gear 6-lug 14 bolt. You would have to narrow it, but it's not really a strength upgrade over a 40 rear unless it's an early 10-spline model.

 

[rblank]

On A Side Note Rblank Your Info Says 5.29's Locked/spooled Is That Locked Front Spooled Rear ???

correct. Detriot quick loc (or whatever the hell they call it ) up front. Full spool in the rear.

 

[rblank]

x2. The light duty GM 3/4 ton pickups in the late 80's to early 90's used a 9.5" ring gear 6-lug 14 bolt. You would have to narrow it, but it's not really a strength upgrade over a 40 rear unless it's an early 10-spline model.

That's only a semi-float 14 bolt. The full floaters only came in 8-lug. They're freaking boat anchors, but strong as hell.

 

[crusier72]

I don't want an 14bolt because they are anchors. The early eatons are lighter and I feel as strong. It's not the shafts I have a problem with it's the gears and diff in the cruiser axles. I won't buy an arb for the rear of my cruiser I feel it's a waist of money for my application and the detroits explode if you break a shaft. A detroit with cromo shafts and a set of fine splines adds up to a bad choice for you're ring and pinions, you will break them. For that kind of money I want to get a stronger axle.
I don't have a big motor but I'm the kind of guy to break a steel ball in a rubber room.

 

[JJS]

That's only a semi-float 14 bolt. The full floaters only came in 8-lug. They're freaking boat anchors, but strong as hell.

That's true. I just know they were 6-lug.

 

[rblank]

You can either shave down a 14 bolt, or go another avenue. Ford hi pinion 9" maybe. I just think you're going to spend as much money trying to find pre-72 parts in the northeast as you are replacing R&P set or shafts.

 

[crusier72]

It's not only about replacing parts I don't like breaking stuff.
I am having a hard time finding one but i haven't had much time to look for one. But i'm sure I can build one for less than a high dollar 9".
But am open to other ideas on a rear axle that will take my abusive drive by braille so called driving style.
Mark

 

[rblank]

I know a guy with a 79 Bronco on 38's, V8, spooled in the rear, and kicks the snot out of it every time he goes out. never broken anything in the rear axle yet. And that's not even a high pinion. Course now I've probably jinxed him and he'll probably break tomorrow.

Also, unless you're plannin on running a full width, full size axle, you're going to have to consider the price of cutting down the Eaton and getting custon axle shafts made.

I think you have better options. You've already said you're having a difficult time finding one, that's becasue they stopped using them 35 years ago.

 

[crusier72]

The cost to cut down the eaton is almost free. But I'm not telling how using stock parts until I can do it to prove it can be done.
What does you're bronco friend run for shafts, spline count.

 

[rblank]

What does you're bronco friend run for shafts, spline count.

stock.... Probably even the original shafts....

 

[JJS]

'79 Bronco would have a 31-spline 9" rear.

 

[Mbrantley]

The 14 bolts are strong, mine laughed at everything I threw at it in my previous buggy but as Mark said they are rock anchors, the one I had one shaved on 40s and it made rock dust every where I went. The mildly shaved Eaton in my new buggy has ~ 12" of clearance under the ring gear on 42s, this is with a 10.25"ring gear. If you think that they are weak because they are old do some more searching....

The C&C HO72 is going to be found under GM rack trucks dump trucks tow trucks and the like from the late 1940s to 1972 the one I have is from 56' and the critical components are still good. Trucks with 19.5" wheels are most likely going to have a 5.14 ratio (what I need as a spare)

As for the 9" the one thing they are known for besides after market support and upgrades is how low the pinion is, yes of course they can be rotated up but then you are looking at a CV shaft to drive on the street, another weak point. A true HI9 however is $weeeeeeet.