Flipping around Rear Drive Line

I was talking to someone the other day about the lift he put in his pickup. He was telling me that whenever he puts a lift in his pickup. He flips his rear driveline. He was telling me why he did that is because. When he starts to flex his pickup the splined part of his drive shaft doesn't pullout as far.? Wondering if that is actually true or not. I haven't heard of anyone doing that before?

 

Uhh.... No.

Not unless he only uses reverse.

 

i dont see any gain on flipping the drive shaft either way the yoke will move the same amount out of the shaft.

 

why would he only be able to use reverse? I have heard of people doing this for rear driveline vibration issues.

 

Yeah that is what i was thinking. It's not like it would change how much it moves. Thought i would ask a dumb question.

 

Flip the rear end over and the rear wheels will move in reverse.

Think about it... Driveshaft spins and pushes down on the front of the ring gear which is on the side of the pinion, which rotates the ring gear forward and drives the rear wheels.

Flip the carrier over, you have moved the ring gear to the other side of the pinion... the driveshaft is still spinning the same direction, so it is now pushing UP on the front of the ring gear, which spins the rear wheels backwards.

OP's friend was bullshitting him due to a basic geometry fail.

The only reason to do it... and I'm not sure that the shaft lengths would match up, would be for a 5-lug... remove the center section and spin the axle housing around it, then reinstall the center section, which will gain ground clearance by moving the spring mounts to the top of the housing.

It will also put the drain on top, the vent on the bottom, flip the shock mounts, brake lines, etc....

There are better ways to move the springs to the top of the axle on a 5-lug.