How often to differential oil?

[Dom249]

I dont really know much about the rear ends at all to be honest. And i dont think I've ever gotton my diff oil changed. Im about due for another oil change and I have around 43,600 miles. What type of oil and weight should I use?

[Just-in]

75W 140 Synthetic.

[Dom249]

Thanks for the info

[silverkorn]

i would also suggest a tranny flush (not drain) and replacing the front diff oil if you have 4X4

[SirKeats]

is the diff oil change and tranny flush something that would generally want to be done at 30k?

[silverkorn]

thats what i was going to do at or before the 30k mark. it all has to do with your use/abuse of the vehicle to determine your fluid change interval. obviously the more you do it the better, but it also costs more.

so you have to weight how often you use your vehicle and what kind of use its doing. i would lengthen the service intervals if you were doing a lot of highway driving and only start the truck under 5 times a day. if your doing a lot of hauling and towing or doing a lot of stop and go then your intervals would be shorter.

[sudden urge]

I checked the differential fluid level one week after I bought it on Dec.03,2005, and I have no intentions of checking it or changing it till the owners manual says it due. Once a week, I visually look for any leaks or wet areas, and that takes about 20 seconds to do.

[Dom249]

Well I dont have a 4x4, but I have around 43k miles. All ive gotton done was an oil changes. What all should I get done when I get the oil changed again? Ill be going in a few weeks or so to get my oil changed again. Thanks

[silverkorn]

i would definally flush the tranny, which doesnt mean drain and replace but replacing with 11 quarts of new fluid which can be on the expensive side

[Dom249]

Yeah thats probably a must being all ive gotton done was a simple oil change and have 43k miles. Anything else? Also what type of oil and what to use for what?.Thanks for all the help so far ppl