JRad405

so is there really a point to changing gear oil?

im sure my car has never had it done for the 14 yrs its been alive. i have 101k on the car too.

and honestly if a dealership tells me to change stuff on my car, its usually more like how can we make a few extra dollars off this fool (no offense to those who work at them). I just had some bad experiences so it makes me skeptical.

stangalator

I did mine right when i bought the car in 08 after 11 years of use and only 32k on the clock the fluid looks nasty, like dirty water. id say do it... but thats just me.

69MustangCoupe393cid

Here's my take on it, changing it can't hurt, and fresh fluid always prolongs the life of parts. I do mine every 50-60k or so and it's changed with Amsoil synthetic. When I did mine at 58k miles it was black, and the magnet had a fair amount of metal on it. So if you're not going to change it ever, I say do it once to get the initial break in metals out, and then every so often just pull the fill plug and clean it off and just run it. However regular change intervals are best.

If someone asked me, I would say every 50k miles with synthetic fluid, and clean it out with brake clean or something to get the crud out. It's really not hard to do, get a pump and it's a snap to fill.

For me it's peace of mind knowing my car has the best of the best fluids in every part of the car. I drive a lot and I need my car to be reliable.

Now what I wanna know is, how many guys who never change their rear fluid no longer have a limited slip rear and have burned up their clutch packs prematurely because the fluid deteriorated. Open rears suck. I bet there are people out there who have no idea their clutch packs are toasted, or not working as well as they used to. Most times you can leave fluid in for the life of the vehicle, but depending on how hard you beat on a car/truck, and what kind of environment it’s in, can really affect the fluid change intervals.

uberstang1

I'm suprised that alot of Amsoil fans actually change their gear fluid more than once. It seems alot of the amsoil people say they change the gear fluid because it "looks dirty" but yet there so avid on the amsoil engine oil they have change invervals of 8-10k miles and thats perfectly fine even though after the first 1k miles that fluid is "dirty looking" just like the gear fluid and it stays in the vehicle for another 8-9k miles.

medrick

ford manual says it doesnt need to be changed and haynes manual says it needs to be changed at 60K. ford also says our cars only require 5 quarts of oil and we all know that is incorrect so who knows. Personally I think 50-60k is a great time to change it for peace of mind.

uberstang1

Ford specifies 6 quarts. Haynes manuals refer to 60k intervals for conventional gear oil purposes. Ford specifies lubricated for life for factory fill synthetic.

tbirdscwd

diff fluid change costs like $20....$30 if you use full synthetic. Gear oil, just like any other type of oil breaks down over time and mileage. Having fresh fluid in there can only extend the life of your parts.

uberstang1

I don't think anyone is trying to argue that, I'm argueing idiot comments from bladerunner such as if you don't change you're diff oil you're factory ford warranty is void and changing on a 20k interval. The main assanine comment is when he said people are "neglecting their rear diffs", the average person has no idea on the mechanics or libricants of an automobile vehicle and when they rear in their manual from the dealership that it doesnt need to be changed they are obviously not going to change it, thats not "neglect" its following the maitenance instructions.