What kind of Diff fluid do you guys run in your jeeps? Like what seems to run the best? I have a D35 if that helps

 

Used to have a '96 and now a '00. D30 front and open 8.25 rear on both. Do not tow. Used to use this in both.

https://www.napaonline.com/napa/en/p/NOC75210/NOC75210

Switched the '00 to this awhile back.

https://www.napaonline.com/napa/en/p/VAC975/VAC975

 

Thanks! I appreciate the help!

 

for what purpose? i'd choose fluid based on use.

off-road use - cheapest 80/90 i could find bc it'll be getting changed a lot

dd pavement princess - 75/90 full syn. i run it in mine and at 80k miles it still looked great. i am going to bump the interval to 100k next time.

 

I am mostly dallying the jeep. What do you use to seal the Diff up? Also I have an 8.25 if this changes anything?

 

Rtv sealant

 

When I swapped the '00 from conventional to synthetic I used this:

https://www.napaonline.com/napa/en/p...944/BK_7651944

 

i used permatex to seal the cover.

 

Got so tired of RTV, I just buy the $2 gasket and give it a light coat of RTV on each side. Has kept my 8.8 on my van dry for a year now. I use whatever is cheapest, as I pump it out every few years and replace it. Fresh cheap oil > old expensive oil.

 

I buy my lube by the 5 gal bucket as it gets changed often and being very cheap compared to what it protects gears/lockers. I change it every 3-4 mo. when I'm wheeling as mud/snow/water all lets water into the differentials even with both of my vents raised up quite high it still gets in.


I use differential covers with drains built into them for easier service and only pull the cover a few times a year to check gears/lockers for problems. I buy mine from an online wholesaler through our business so prices are a bit cheaper.

 

Context: I don't tow or do any hard wheeling, though I do haul lots of cargo multiple times per year.

I use synthetic 75w90 with Lube Locker gaskets, no RTV.

 

I use Mobil 1 75w-90 for mostly on-road use with no towing.

 

Front diff is different from rear diff. .. depends on if you are towing also.

All about keeping gears clean and cool.

Front diff is thinner stuff.
Rear diff is thicker, if you tow AL the time, might want even thicker than recommended...

If you are a daily driver, and towing light loads, occasionally. .. go with Mopar recommended numbers. Not cheap quality stuff. Seal a gasket works just fine in these. Not so much in trucks.

 

Thanks for all the help guys I got it figured out. I accidentally bought a high temp RTV so I had to wait 24 hours before I could put fluid back in it but she seems pretty great now.