Eaton H052 - Drop Out Pumpkin Swap?

[64c20crewcab]

Hey folks,

Hunting down the real deal on the H052 is what brought me to this board a few yrs back.

Here is what a local guy running the truck wrecking yard in arcadia (peck & live oak) told me. I can take my truck with this Eaton to a diff shop in alhambra and have them install a different drop out with 3.46 gears! and possibly swap out shafts for a 6 or 5-lug as well. Anybody ever hear of this pumpkin swap on an Eaton?

I've not contacted the shop that was mentioned - yet. Will try to do it this coming week.

Anybody ever hear of this swap??

[ChiefRocka]

Never heard of it but sounds cool.....I thought their wasn't much available for that axle...like lockers and such.

[64c20crewcab]

thats just it. there is almost nothing over the counter available. just wrekin yard finds at best. i'll see what i can find out here but if any one of ya mo-truckers know other wise - please chime in.

now for that cup of coffee!

[ChiefRocka]

Man that cup of coffee must be a bi#ch to get to...you've been speaking of it for a while now.

[justcuz]

Well the Eaton does have a drop out pumpkin like a 9" Ford and so it is swappable. As far as the axles are concerned you would have to machine the full floating hubs to a 5 or 6 lug pattern. Honestly I don't think it's worth it to machine down those hubs as the rearends are hard to get parts for and getting rarer. Plus I do not think it will machine down small enough for a 5 on 5 bolt pattern. I would look for a semi-floater 14 bolt with 3.42 gears if it was me...and Tony's may even have one. Also talk to Ron at Walker 400 in San Gabriel and ask about one. He can find it for you on the call out. Tell him Cuz from the fire department told you to call.

[64c20crewcab]

coffee - hmmmmm - kitchen is on the other side of the house. so ya it a b :-)

rearend - i thougt the same thing but want all at once. need direct bolt in or i would have gone with a 14 bolt in the first place. its my only ride for now besides the bike. a 14 bolt would reqire minimal work. that i can not do at this time and dont know of any shops locally as i did when i was up north. starting over here in so cal so to speak. need to make contacts here - soon.

thanks guys! now where did i leave my cup of coffee

[64c20crewcab]

He said the state wanted him gone 6/1. He also said that any frontends in the 70's and earlier he had scrapped the week b4 i got there! I seen a few a PaP that same day. If not I will contact the one u mentioned earlier.

yes that was including the tranny.

[justcuz]

Norm,

My son lost his trans cooler in the radiator. Polluted his cooling system and drained his trans pan, causing terminal meltdown on his 4l60e. Shopping around the best deal he could find is Precision Allison Transmission in Upland.
Around $1600.00 with a bunch of upgrades, (similar to a 4l65e). So the 2200 for the place in Hesperia installed and complete is not too bad. By the way, this guy in Upland, his shop is so clean you could probably eat of the work benches. Find a new place of employment yet?

[64c20crewcab]

Cuz,

Sorry to hear of the mishap on your boy's truck! Upland aint too far and much closer than Hesperia. Here is the link for the Tranny place I've spoken to:
http://www.bowtieoverdrives.com/index.shtml

As for finding new job - Thanks but no not yet. There are a few possibilities in and outside of the telecom industry. Will see what the coming week has in store. Looks like I'm gonna have to bite the bullet and take what I can for now...

Currently getting my truck ready for the Brothers Chevy & GMC show next weekend in Anaheim. You going?

Also I just listed a ton of stuff on Craigslist - Los Angeles under 60 - 66 CHEVY C10 TRUCK PARTS. MUST clear the garage out now

[justcuz]

I don't know, I've been at work a lot. We have people out on these fires and I am backfilling here at work. I am scheduled to be off Sunday the 13th.
I also need to locate a 14 bolt semi float for my 93 Suburban. My rear wheel bearings have been replaced once and one is now leaking. For the cost of axles, new bearings and seals, I can buy a 14 bolt and replace it. I will then get bigger brakes, bearings ring gear and carrier in the process. It should last another 200 thousand!

[64c20crewcab]

Well if you or any of ya do go to the show next week and see my ride - come on up and say Aloha, Howdy or Hey...

[justcuz]

I sure will. Maybe the boy and I will come down. Have not had a day together in a while.

[Fred T]

Somehow I missed this thread. Looks like you're going to a 14 bolt. The best gears you will find easily for a HO52 will be 4.10. There were a few 3.90, but I have only heard of them, never saw one. The 4.56 is the most common.

With the 14 bolt you can get 3.73 easily, I have seen a couple of 3.42s.

[factorystock]

I think the 3.90 eaton is a myth personally. Someone is probably confusing the the eaton 3/4 ton pumkin with the pre 1963 1/2 rear end which was a pumpkin which came with a 3.90 ratio. The aftermarket produced a 3.55 ratio for pre 63 1/2 tons, hopefully the aftermarket will produce the same gears for the 3/4 tons if enough people ask for it.

[64c20crewcab]

Thanks Guys!

I recently bought a 4.10 pumpkin from a fellow board member in AZ for $20 + $60 shipping. Should have it here in the next few days. Will be installing this and a 700r4 soon.

Also I found the local shop that I was referred to in my original post regarding a 3.42 pumpkin swap into a H052. Its Differntial Exchange in Norwalk, CA not Alhambra as mentioned before. I should have this fact or fiction resolved sometime next week. Will post my findings.

Thanks Again!!

[Fred T]

Originally Posted by 64c20crewcab

Thanks Guys!

I recently bought a 4.10 pumpkin from a fellow board member in AZ for $20 + $60 shipping. Should have it here in the next few days. Will be installing this and a 700r4 soon.

Also I found the local shop that I was referred to in my original post regarding a 3.42 pumpkin swap into a H052. Its Differntial Exchange in Norwalk, CA not Alhambra as mentioned before. I should have this fact or fiction resolved sometime next week. Will post my findings.

Thanks Again!!

Iirc, mine was $100 and I had to go pick it up. But it came with the differential attached.

I am very interested in the 3.42 swap. I remember being told that a 14 bolt carrier would fit in a 10 bolt housing, but the spline count is different.

[64c20crewcab]

Originally Posted by Fred T

Iirc, mine was $100 and I had to go pick it up. But it came with the differential attached.

I am very interested in the 3.42 swap. I remember being told that a 14 bolt carrier would fit in a 10 bolt housing, but the spline count is different.

You are almost right here. A locker from a 14 bolt will fit not the complete carrier. If the carrier did then we'd be installing 3.42 gears without issue - I WISH. Yes the spider gears are a different spline count H052:17 and I believe the 14bolt is 30. You would have to use the axle shafts from the 14 bolt and have them shortened down a bit. From what I've read at pirate4x4 the cut is bout 3/4" or so. Its been awhile since I read that info.

I got the H052 pumpkin with the 4.10 gears from board memeber: tfkorinek today. Will have time to clean it up and plan an install within the next 2weeks. But will try to talk to the local diff shop here on 7/22 or 7/23. Will see what happens.

UPDATE: The 4.10 pumpkin turned out to be a 4.56 - i did get a refund from the seller. Good Guy!

Stay tuned!

[64c20crewcab]

OK here is an update on the 3.42 drop out swap for an Eaton rearend.
It aint possible. The local truck wrecking yard owner that told me this is mistaken.

I went to the shop that he used for diff work over the pas 15 yrs. This shop owner straightend me out on this. He took a look and said no I it can not be done. He called around for gear selection availability for these and came up with nothing - as expected. His only suggestion was to use a later model 3/4 ton rearend with disc brakes and 3.?? gears and call it a day. He'd do the swap for bout $1,200.

Thats one option and the other is to use a complete F&R 6-lug suspension from a doner 66 C10. I have all of this sitting in the garage now. Convert the rear to 3.73 then bolt in. Decision, decisions....

[Fred T]

I was starting to get my hopes up. At least now we know...

The problem I have with the 14 bolt is that it doesn't look right under these trucks. The 12 bolt is okay for looks, it's not as big. And it did have better gears.

I wish we could get someone to cut some 3.73s for the HO52. Art Houser was cutting 4.10 & 3.90, but he's no longer with us.

[64c20crewcab]

Ya know that maybe if we could get a commitment from a few of the H052 Guys that maybe we can get a minimum number of sets cut?

What do ya think?

I can ask the shop I spoke to yesterday to see if its a possibility.

[Fred T]

The last ones I saw were selling for $600. I doubt if you get too many takers at that price.

[64c20crewcab]

Yikes - well it was a thought! Planning on taking the 1/2 ton 66 rear I mentioned and have it geared to a 3.73 Will run 6 lug for now and 5 lug down the road. Will strip the 14 bolt disc brakes off the H052 and see what I can do with this set up.

[Captainfab]

If you want to stay with a 3/4 ton diff and 8 lug wheels you could go with a Dana 60. They're a little smaller than a FF 14 bolt and the aftermarket offers gears up to 3.54. You might get lucky and find one that'll bolt in. I have a '71 C20 rolling chassis with a 3.54 geared Dana 60 that'll be going into my '66 C20. So they did put them in from the factory....just a matter of finding one. Or just find a 60 and weld on the proper mounts.

[justcuz]

Norm, my vote is to stay with the 8 lug and do one of two things.

1. Find a Ford Dana 60 or Sterling 3.54 rear end.
Ford put a lot of 354's in truck from the 80's on for emmissions and mileage.
2.For the $1200.00 swapout, I would save a little more, keep the 4.10 HO52 and go with the 700R4.

The early 3 series gears do exist for the HO52 rear end, but probably rare as hens teeth.

The best of all worlds is keep it 3/4 ton (unbreakable drivetrain and biggest brakes), keep the HO52 with 4.10 gears and Detroit Locker, and step up to the 700R4. You have the long tailshaft 350 so a 700R4 is pretty much a bolt in.

Everybody does the 1/2 ton boogie, be different and stay 3/4 ton!
Hell, after seeing the stuff at the Brothers show, I'm thinking of getting rid of my 1/2 ton and buying a 1 ton! More unique...and bomb proof. Cuz.

[justcuz]

Norm, did not see that the rear end was a 4.56 not 4.11.

Now I will alter my recommendation.

Keep the HO52 with 4.56 gears and disc brakes.
Put front discs on the truck.
Save up for that 700R4.

This gives you the best of everything IMO.
3.00 low gear in 700R4 x 4.56 = 13.68 first gear to get the load rollin.
.70 high gear in the 700R4 X 4.56 = 3.192 final drive for highway cruising.
Plus the low gear calculation does not even calculate the torque multiplication from the converter.

This truck would be the best all around with this combo and all you would have to change is the transmission!

Now I've gotta look that guy up in Hemet for that 1961 3/4 ton!