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Jambx

B61 Conversion from Tandem to Single Axle

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Ok folks - newbie first post.

I am looking for a B61 to have a bit of fun with and to pull our vintage JD tractors to the local pulls. I have been looking at a number of trucks and think I may have found one that would suit my needs but....its a twin screw. I would rather have a single axel and have googled the conversions of a twin to single but nothing related to the B61.

I would like to ask the experts here the complexity of this type of mod. I would think most if not all (maybe a new driveshaft) of the pieces and parts are already there and my simplistic brain is telling me remove both axles and take the back and move it to the front - done! But I know there is brake and suspension considerations as well.

Can you let me know your thoughts on this if it is feasible and what I am missing.

Any and all comments, recommendations and concerns are very very appreciated.

Thank you all in advance!

Jim

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Welcome, Jim. I spent last winter doing a tandem to single axle conversion of my B61. The job itself is pretty straight forward . Assuming that the tandem you are talking about is a camelback suspension with top load rears, You probably won't be able to reuse them as a single axle. You will need  to find a single axle rear, springs and spring hangers. Then you just basically drill for the hangers, mount the rear, make a new driveshaft, and re plumb the brakes. There are some options to consider, like what gear ratio would suit you best, or do you want to install a modern rear and air ride. Also keep in mind that your DOT may complicate matters if you try to reduce the truck's GVW. You don't have to change the GVW, and maybe it doesn't matter if you tag the truck as an antique. Just another consideration. There are plenty of single axle trucks around.

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Welcome aboard!
Look in the for sale section. One of our members has a single axle with a period correct trailer for sale

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You could use the back rear off a mack tandem, but you have to come up with a suspension.    terry:D

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another thing to consider is most all camelback tandems are double frame and the frame is doubled on the inside. this may not be an issue but youd have to use the 1/2 narrower crossmembers from the tandem unless of course your going to air ride. myself I would keep it a tandem cause there are a ton more single axles out there than B61 tandems. tandem axle b61's are kinda scarce. would be unethical to shorten one up in my eyes unless the frame had issues

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Thank you for all your input - all great advice - I was hoping to go for the one for sale but it's sold - so I am not sure what direction I will go. Again much appreciated. 

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