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What would be a good 2R rear axle swap?

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  • Alan
    replied
    I have a 73 F100 9" in my T-Cab. It is 5 on 5.

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  • Jerry Forrester
    replied
    Originally posted by Alan View Post
    What is wrong with a Ford Truck 9". Furd trucks from the late 50's through the 60's had 5 on 5 and drop right in on your spring pads.
    No, I think Ford trucks of that era were 5 on 5 1/2".

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  • 52-fan
    replied
    I guess I didn't remember them being 5 on 5. I knew some Chevy wheels fit the Stude trucks. The 9" rears do tend to cost more, but that would be an option.

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  • Alan
    replied
    What is wrong with a Ford Truck 9". Furd trucks from the late 50's through the 60's had 5 on 5 and drop right in on your spring pads.

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  • 52-fan
    replied
    Originally posted by Jerry Forrester View Post
    I've never heard of such. Starting in '71, Chevy and GMC 1/2 ton 2WD PU's had a 5 on 5 bolt pattern.
    You are correct. I typed it in wrong. I guess the 1/2 carried over because the cars have a 4 1/2 pattern. I changed it, but the confusion has already started.

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  • 52-fan
    replied
    Originally posted by RadioRoy View Post
    Hard to imagine one of them having an axle ratio in the high four numbers. Based on my experience with a 51 car, a Champion six will have a hard time hauling a truck with any ratio taller than that.

    Will a 47-50 Commander CAR rear axle fit?
    My truck has a 64 model 259. I'll get it working some way. I was hoping someone had already done this and could save me some searching.

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  • RadioRoy
    replied
    Originally posted by sweetolbob View Post
    Look at variants of Dodge and Durango 1/2 tons from the 80's to mid 2000's. Bob
    Hard to imagine one of them having an axle ratio in the high four numbers. Based on my experience with a 51 car, a Champion six will have a hard time hauling a truck with any ratio taller than that.

    Will a 47-50 Commander CAR rear axle fit?

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  • Jerry Forrester
    replied
    Originally posted by 52-fan View Post
    Chevy pickup rear end with the 5 on 5 1/2 bolt pattern
    I've never heard of such. Starting in '71, Chevy and GMC 1/2 ton 2WD PU's had a 5 on 5 bolt pattern.

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  • 52-fan
    replied
    Originally posted by jclary View Post
    That sounds like a potentially good option! A few questions come to mind. Since your current rear end is a 3/4 ton, I wonder about the springs? If they are the same as the 1/2 ton, and both rear ends line up and bolt up...is it possible that you can use the current drive shaft? How about the emergency brake cables? It would be great if everything does line up and all you end up having to do is bolt it up and you are good to go!
    The springs appear to be the heavy duty springs that would have been available on my truck. I hope the later spring pads match. The parking brake cable on the truck now is stock up to where the different rear end's cable meets it. It would be great if the drive shaft would swap, but I am not counting on it.
    The actual refurbishment of the rear end would be similar to what I did when I changed out the axles on the Scout I sold to buy my Commander. At least I won't have the front unit to wrestle with this time. In any case, the 3/4 ton rear will work for a while. It has new wheel cylinders and shoes.

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  • jclary
    replied
    Originally posted by 52-fan View Post
    Yeah, you are a bit far.
    I know of a rear end from an E series truck about 50 miles north of me. I may go back and check on it. I have no idea what ratio it is.
    That sounds like a potentially good option! A few questions come to mind. Since your current rear end is a 3/4 ton, I wonder about the springs? If they are the same as the 1/2 ton, and both rear ends line up and bolt up...is it possible that you can use the current drive shaft? How about the emergency brake cables? It would be great if everything does line up and all you end up having to do is bolt it up and you are good to go!

    If that's the case, then you can play with the truck and drive it while you go through the replacement rear end to make sure all is well with it. Like checking out the axle bearings, propeller seal, and don't forget to remove the plugs at each axle bearing, insert a grease fitting, and give them a shot of grease until it oozes out the weep hole. I would be tempted to give the rear gears a kerosene bath for a few days, and then drain it, use a very bright flashlight to inspect the gear teeth. If everything checks out, then replace the cover gasket, button it up, lube it up. While you are working on it, you can replace or rebuild your brake cylinders, and even make new brake lines to the distribution "tee" block on the rear axle housing. All of this is assuming that the "E" series rear end is complete with backing plates, hubs/drums, etc. in place.

    Good luck and keep us informed. Sounds like you have a fun project that should keep you outta trouble for a while!

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  • 52-fan
    replied
    Originally posted by Skip Lackie View Post
    I suspect the easiest solution would be to find a model 44 from a pre-56 Stude pickup. They are not that hard to find, would not be expensive, and everything will fit and interchange that should. Not sure about the width of the GM truck axles, but you still would have the issue that the brake parts will be different, and the wheels, etc will not completely interchange front-to-rear and vice-versa. Any of the available ratios will work well with OD, and those as low numerically as 4.09 were available. I think I may still have one from a 3R5 in storage, but I'm a long way from Arkansas. You might try posting your wants on the Stude truck talk site, as more truckers hang out there.
    Yeah, you are a bit far.
    I know of a rear end from an E series truck about 50 miles north of me. I may go back and check on it. I have no idea what ratio it is.

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  • 52-fan
    replied
    Originally posted by sweetolbob View Post
    Look at variants of Dodge and Durango 1/2 tons from the 80's to mid 2000's. Bob
    I did not realize they had the same bolt pattern. Lots of those around.
    EDIT Yes, I now know they aren't what I need. I had the original pattern entered wrong.
    Last edited by 52-fan; 06-10-2019, 06:27 AM.

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  • Skip Lackie
    replied
    I suspect the easiest solution would be to find a model 44 from a pre-56 Stude pickup. They are not that hard to find, would not be expensive, and everything will fit and interchange that should. Not sure about the width of the GM truck axles, but you still would have the issue that the brake parts will be different, and the wheels, etc will not completely interchange front-to-rear and vice-versa. Any of the available ratios will work well with OD, and those as low numerically as 4.09 were available. I think I may still have one from a 3R5 in storage, but I'm a long way from Arkansas. You might try posting your wants on the Stude truck talk site, as more truckers hang out there.

    Leave a comment:


  • jackb
    replied
    Find a Champ 44 with 3.73's and just drop it in. It will be a bit wider, but if you keep the narrow tires, it looks good IMHO...

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  • sweetolbob
    replied
    Look at variants of Dodge and Durango 1/2 tons from the 80's to mid 2000's. Bob

    Leave a comment:

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