driveshaft length rear diff swap

BigBlockMopar said

Since you're a welder... If you know how to properly seperate/grind the end-piece/yoke from a driveshaft and be able to shorten the remaining shaft nicely with say a pipecutter, you could do all the work yourself. Save for balancing usually.
Make sure to keep the yokes on both ends of the tubing aligned, as they are now.

If you weld cleanly you probably could drive the car as-is without balancing, but having it balanced is advisable.

I've shortened the same driveshaft in my '73 Dart twice myself and still can get the car upto 80mph without serious vibrations.
I first went from a 7-1/4" axle to a 8-3/4" and later on from a 904-transmission to a A518.

Click to expand...

You can not do it yourself with out truing the shaft.

You don't just cut the weld yoke off and join it to a tube, thats WRONG, and can be deadly at the worst case scenario, but very well could put you in a hospital when that shaft comes thru the floor at 60 mph because of the vibrations it has going on you don't feel, which is weakening it, and you're in a hospital with bills costing more than your car.


But that $70 you saved doing it yourself is gonna be awesome......

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Please, use these forums right and not for not well thought out ideas.

When you don't know why and how something is done or it's workings YOU don't give bad advice that can kill someone.

Driveshafts can and do cut thru what people believe are impenetrable items, safety loops can and do get cut thru and floors and cages and seats and people.


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