Eaton HO52 Dually Rearend Question

[LaterMater]

Hello Folks,

I am new to this site and new to old trucks. I have a 1956 GMC 250 that was converted into a tow truck back in the day. It has what I believe to be an Eaton HO52 rearend based on looking at what I could find last night on the internet. What is the most highway friendly gear set available for this unit? It has what I believe to be a 5:14 in it currently.

Thanks for the help,

LaterMater

[Fred T]

The 4.10 gearing is the best gearing you will find available. I have been that there were a few made with 3.73 and 3.90 gears, but have never seen them. The most available gears are 4.56.

I put 4.10 gears and 31" tires on my 52. 60 mph is about 2700 rpm.

[54blackhornet]

Can you post a picture of your 250, I have a 50 GMC 250 I am just getting started on. Thanks

[LaterMater]

Thanks Fred and 54blackhornet. That confirms what I heard, that 4:10 was the best I would be able to readily find.

I would love to post a picture. Can you tell me the best way to do it. I looked at attachments, and that did not look favorable as the max size was pretty small for the file. The other is to post via http. Do I need a photo hosting site like photobucket? Thanks,

Steve

[Fred T]

For posting photos
http://67-72chevytrucks.com/vboard/s...d.php?t=209103

[54blackhornet]

Thanks Fred for the info on posting photos, I have tryed in the past a failed!
To big file size i guess.:gmc2

[LaterMater]

Let's see if my picture shows up. It is 141k, and I cannot seem to reduce it below 100k without losing the picture.

[LaterMater]

It worked !!! This truck came out of Colorado Springs EXACTLY as seen in this picture with the exception of the front rims and tires. 1956 GMC 250 with later fleetside bed and wrecker unit. I asked the guy if he had seen the CARS movie and he had never heard of it. So this is Mater. My son loves riding in this truck. I made a custom aircleaner high rise to look like Mater's aircleaner, and am moving the battery tray off of the firewall to make it look like the animated truck. Next will be some overspray paint and hand lettering on the doors to make it look like Mater.

[Bigblue29]

That truck is awesome!

[entourageguy]

This the guy your talkin' about ??

[mike in mo]

the 3.90 gears are out there i have seen 2 sets now they only come as a option in the 396/400 turbo 3/4 ton with a/c in 69. thats a sweet lookin rig you got there. are the wheels 16 or 18 inch?

[LaterMater]

Thanks guys !! That is great information to know about the 3:90. If anyone sees one of those for sale, let me know. I also have a Hone-O-Drive which is an after market stand-alone Over Drive unit from the 60's that I could put in there to get better highway gearing, but I would prefer to do it just with a ring and pinion change. The Hone-O-Drive has a 30% reduction. The rims on the truck are 19.5's.