What do you use for diff fluid and transfer case oil?

Just bought a truck and am looking for advise on what yall use not only the brand but also the weight (75w-90) or what ever.

 

Valvoline 75w-90

 

The only Amsoil product I use. Severe Gear 75W-90.

https://www.amsoil.com/p/amsoil-severe-gear-75w-90-100-synthetic-gear-lube-svg/?code=SVGPK-EA

 

Any good quality 75-90 in the diffs is just fine as far as I'm concerned.

 

I used Red Line 75W85 on the differentials and Motyl Gear 75W90 on the transfer case

 

Ranch Dressing, but only the organic stuff.

 

Tcase I’d probably put syn 75w90 gear oil

Diffs I have what ECGS recommends 75w140 figure they know what they’re talking about.

 

Welcome to TW…

 

w/e the cheapest full synthetic 75w-90 is easily available changed at regular intervals will be better than ANY fancy high end super expensive gear oil changed only here and there.

After inital breakin of front / rear / tcase change, realistically a 30-50k mile rear diff OCI and 60-100k mi tcase / front diff OCI depending on how heavily used 4wd is / loaded the truck is is plenty.

 

Good call… which part of that concoction is organic?

 

Doesn't matter just get the property viscosity

 

Greetings. I'm like most here I believe. The least expensive synthetic APL GL-5 75W-90 gear oil. In all the years I've owned a jeep or taco I can't say I've ever seen or noticed a difference. Like what was mentioned above, as long as you are using something the same as/similar to what is specified, probably the most important thing is to follow the service intervals.

 

THE ONLY CAEVAT is if you have an 08 or older truck with the mechanical LSD.... which you would need the LSD additive (which damn near most full syn gear oils have these days)