Rear-end lube change

Golden_HVAC wrote:

westend wrote:
I know some guys that have used the Royal Purple with good results. Since all oils are rated for use, I don't think you can go wrong with similar rated products. You must be preparing for many differential oil changes if purchasing 5 gallons!

That 10.3L diesel engine is not feeding it's power into a 14" rear end made for a pickup. The rear axle is huge, and 5 gallons is probably close to what will get drained out of there.

Fred.

I know this is an old thread but I did want to say I had about a 1/2 gallon left out of the 5 gallon bucket when finished.

Dave H M wrote:
Different strokes, but if I were changing the diffy oil and the diff had a removable pan, I would take it off.

All the bad stuff, if any, will be on the bottom.

I like that idea but if Im not mistaken....its a sealed unit, of course I could be wrong cause when I crawl under there's so much to look at and look for but Ill do exactly what you suggest if at all possible.

Different strokes, but if I were changing the diffy oil and the diff had a removable pan, I would take it off.

All the bad stuff, if any, will be on the bottom.

Thanks all.....I used that 5 gallon estimate from another forum talking about the fluid change. Ill dig out my paperwork before the actual purchase and/or drain it first to see the approx amount that comes out.

Hey Fred, good idea on the drill pump....I had read someplace else about using that exact method for draining the Hydraulic resevoir(think it was an old video from Brett Wolff)....thats another project.

5 Gallon diff!!! You must wear a 10 Gallon hat:B

westend wrote:
I know some guys that have used the Royal Purple with good results. Since all oils are rated for use, I don't think you can go wrong with similar rated products. You must be preparing for many differential oil changes if purchasing 5 gallons!

That 10.3L diesel engine is not feeding it's power into a 14" rear end made for a pickup. The rear axle is huge, and 5 gallons is probably close to what will get drained out of there.

Fred.

What I did when pumping out my rear axle fluid was buy a drill powered pump from Harbor Frieght or other places. Then took a washing machine hose and cut it in half, so I would have a inlet and outlet hose that attached to the pump.

Removed the plug, it smells! Pumped out what I could pump out, then put back the recommended fluid for the truck I had at the time. I think it was about 1.5 gallons on my 1975 F-350 with Dana rear axle. Some of the fluid will be inside each axle tube, so if one side is up higher than the other while in your work area, you might consider letting it drain for a 1/2 hour or so, then lift the other side of the axle to about 2" above the center of the axle, to let that side drain, let it sit for 1/2 hour, and you might be able to pump out another quart or two of the older fluid that sits in the axle tubes.

If you are using synthetic, you should not need to change it again for a really long time.

Good luck!

Fred.

I know some guys that have used the Royal Purple with good results. Since all oils are rated for use, I don't think you can go wrong with similar rated products. You must be preparing for many differential oil changes if purchasing 5 gallons!