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Rear end replacement on 1984 dodge d150

11173 Views 6 Replies 6 Participants Last post by  TWX
Currently own 1984 dodge d150 and would like to know what the exact steps are for me to take in replacing the rear end. Due to continuous jumping and slamming when changing from "in park" to "reverse" or "in park" to "drive", there is a hard jolt/slam shortly after. Consulted a few friends and co-workers and they all seem to think that the rear end is on the Frits. Due to my current financial circumstances, I'm not going to drive it until it just breaks, which everyone suggests. Unless I want to pull apart the differential and I'm positive that won't go back together if that was the alternative due to the massive rust and lets just say it may fall apart if I touch it. Drivetrain is moving fine, so "U Joints" are not the issue. Really hoping I can get some feedback as to the issues I'm having. Please and thanks
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Well, if it is the rear end, the cheapest and simplest solution, in my opinion, is to pull another axle out of another truck at a self-service junkyard. If I remember correctly, 84 is THE LAST year of 5 on 4.5" for the half-ton trucks. You can probably pull an axle from any 5-lug half-ton truck from '72 to '84, and possibly even as far back as 1960. The trick will be to find the same gear ratio, so that it doesn't change how your speedometer reads. It might also be good to verify that the yoke is the same size. On the cars they used two different yokes, depending on if the car had the more powerful drivetrain or the less powerful drivetrain.

If you pull a used axle, probably a good idea to find a wrecked truck, rather than a truck in bodily-good shape, as the source. A wrecked truck was operating when it died, while a truck in good shape could be in the yard because the axle died.
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