How often do you change your Front/Rear Differential Fluid?

I change it every two years because it sees about 15K in towing in that amount of time. Amsoil is what I use and it is cheap insurance. I have had them go out only once when I found out I should have been servicing them. Never again, and it will increase your MPG as well.

352 wrote:
Every time I change my engine oil. Every 2,000 miles to be safe and you should too.

Okay, now there's a guy with a sense of humor. :)

I have major maintenance performed every 50,000 miles, which includes synthetic differential fluid change.

I do my trans and rear diff every 25k miles. Fluid is cheap compared to a repair due to lack of maintenance.

Fluid may be "cheap insurance" but you're slightly increasing the risk of failure. What if you make a mistake when changing it? E.g. Wrong level of fluid, contamination or create a leak. Some things are better left alone for longer periods.

wnjj wrote:
Fluid may be "cheap insurance" but you're slightly increasing the risk of failure. What if you make a mistake when changing it? E.g. Wrong level of fluid, contamination or create a leak. Some things are better left alone for longer periods.

What? I'll change mine when I replace my transmission filter and adjust the bands at 30,000 mile intervals. I already have a cast aluminum differential cover with drain plug and full synthetic. Fear of doing simple maintenance just isn't in my wheel house.

wnjj wrote:
Fluid may be "cheap insurance" but you're slightly increasing the risk of failure. What if you make a mistake when changing it? E.g. Wrong level of fluid, contamination or create a leak. Some things are better left alone for longer periods.

While I don't think changing diff juice as a matter of course every 3-4 oil changes is even remotely necessary, the slight risk of failure is really non existent. Like saying brushing your teeth twice a day doubles your risk of getting toothpaste in your eye!

ParkCountry wrote:
What is your regimen?

I have found that reading, understanding, and following the owner's manual always works best!

DownTheAvenue wrote:

ParkCountry wrote:
What is your regimen?

I have found that reading, understanding, and following the owner's manual always works best!

That is good advice unless you know that you did something well outside of normal operating range. One tidbit that I have found in two of my manuals that does not seem to be widely followed is to put the transmission in neutral if you are going to be stopped for several minutes to reduce heat buildup.

Here I thought it were check fuel level while filling engine with oil?!?!?

Marty