Going to do a differential axel change. Manual says Gear Oil 80W90 for front but the rear diff has different types. I have a 2000 wrangler TJ manual 2.5L no AC. It’s an SE believe. What should I put in it. Also the capacity is 5 quarts , correct?
One more question, when should I open the diff cover, clean and RTV seal it back up VS. just do a fluid change?
the Jeep is 23 years old and has 112K.
Do yourself a favor and buy lubelocker gaskets instead of using RTV. Makes subsequent fluid changes simpler and less time consuming.
Is there a vent valve on top of the differentials? I had a tacoma with vent valve that had to be checked to make sure its loose so its venting.
Waste of $$$ for Lucas, it's nothing special. Personally I'd run nothing but a conventional gear lube in my axles, it's proven to help the gears run cooler than they would with a synthetic gear lube. Castrol, Mobil, Valvoline, Torco, NAPA, etc. are all fine choices.Thank you guys. Thinking about getting Lucas Gear and Axle 80w90 for both front and rear.
Waste of $$$ for Lucas, it's nothing special. Personally I'd run nothing but a conventional gear lube in my axles, it's proven to help the gears run cooler than they would with a synthetic gear lube. Castrol, Mobil, Valvoline, Torco, NAPA, etc. are all fine choices.
And the exact viscosity is absolutely not critical. A 75W-90 or 80W-90 is fine for most uses. I'd only go to a higher viscosity like 85W-120 etc. if I was doing a lot of trailer towing or wheeling on extreme trails.
One more question, when should I open the diff cover, clean and RTV seal it back up VS. just do a fluid change?
the Jeep is 23 years old and has 112K.
Thanks. Is there a vent valve on top of the differentials? I had a tacoma with vent valve that had to be checked to make sure its loose so its venting.
Your axle won't care in the least. Keep in mind your gears will run hotter when lubed with a synthetic. Really.Probably the dumbest question ever, and I ought to know the answer…I went and picked up a couple quarts of Royal Purple 75W-140 for my Dana44 w/LSD.
Or so I thought. One of the quarts was 75W-90. Makes no difference? I don’t do any serious towing.
Thanks in advance.
Rich
If you don't believe ask respected manufacturers like Dynatrac, Currie, Yukon, Revolution Gear, etc. why they either require or recommend conventional gear lubes.I'm still not buying that one. They are claiming that synthetic, which in most cases is now just hydrocracked conventional, is somehow less conductive to heat than straight conventional. And the synthetic creates marginally less heat to start with.