changing all my fluids

gsrtroy · **Posted:** Wed Mar 25, 2009 12:06 am

soon ill be doing a trans flush, front and rear diff change, transfer case, and oil change at my shop. i use Mobil 1 for engine oil, and for the diffs im going to use Mobil 1 75w-140 gear oil. but i was wondering what people are using for the transfer case and transmission, i wanted to use Mobil 1 but it doesn't specify that its atf+4 so what are u guys using?

tjkoen01 · **Posted:** Wed Mar 25, 2009 12:51 am

atf+4...the last time i did it all i could find was valvoline. i think you can get the mopar stuff at wally world....probably cheaper than from the dealer

Boiler · **Posted:** Wed Mar 25, 2009 1:13 am

I was tired of looking for enough ATF+4 to do a flush and I broke down and got Autozone ATF+4....the guy told me it was made by valvoline but pfft, who knows. Guess I shoulda bought online.

JeepinJarhead03 · **Posted:** Wed Mar 25, 2009 2:05 am

someone will probably grill me for this one

i use castroil ATF4, its the only product they make that I'll use, i use mobil 1 oil/filter, mobil 75-140 with additive in the front and 75-90 purple sweetness in the rear

i used to use 75-90 purple in the front but it whined, so i switched to 140 and it quit whining

the rear probably whines a little but I don't hear it

JJsTJ · **Posted:** Wed Mar 25, 2009 8:13 am

Amsoil in everything.

:wink:

jeepkj02 · **Posted:** Wed Mar 25, 2009 8:49 am

You forgot your brake fluid (DOT3/4/5.1) , power steering fluid (regular PS fluid, for your 2002) and coolant (Zerex G-05).

Both tranny and t-case use ATF+4. I use Valvoline ATF+4.

I use 75W90 in both the front and rear diffs. If you tow a lot or do frequent offroading, I would use 75W140.

Engine oil. 5W30

Engine oil filter. I like to use either Napa Gold or Wix (same filter), or Purolator PUREONE filters.

Dave08 · **Joined:** Fri Nov 02, 2007 4:17 pm **Posts:** 250

Amsoil: Coolant
70-140 severe gear
0-30 W. engine
Universal Auto Trans Fluid (ATF 4 compatible)

hooperswish · **Posted:** Wed Mar 25, 2009 12:32 pm

The old spec of 75 w 90 has been changed to 75 w 110

http://www.lubrizol.com/products/automo ... l/J306.asp

I am putting in some amsoil 75 w 110 in a couple of weeks.

JJsTJ · **Posted:** Wed Mar 25, 2009 12:55 pm

hooperswish wrote:

The old spec of 75 w 90 has been changed to 75 w 110

http://www.lubrizol.com/products/automo ... l/J306.asp

I am putting in some amsoil 75 w 110 in a couple of weeks.

Good stuff. Use it in all 4 of my Jeeps in both diffs.

gsrtroy · **Posted:** Wed Mar 25, 2009 2:51 pm

well my power steering fluid was just changed, but what it the additive you guys add to the front diff, my jeep only has part time high and low, as well as 2hi

JeepinJarhead03 · **Posted:** Wed Mar 25, 2009 3:21 pm

if you have a LSD in the front you need 4oz of the additive for LSD's if you don't use the lube that already has it in there like the royal purple stuff does

i put a lil extra additive in the royal purple anyway, the additive will not harm or help open diff's, it's just complicated stuff for the clutches in limited slip diffs

jeepkj02 · **Posted:** Wed Mar 25, 2009 4:26 pm

DC never offered a LSD in the front diff, only the rear.

JeepinJarhead03 · **Posted:** Wed Mar 25, 2009 5:05 pm

he asked why people kept mentioning additives in the front

I should have elaborated with the statement:

If you have a LSD in the front -- Due to the fact that you put a truetrac in there as quite a few of us have -- then you need additive

thanks captain obvious :lol:

gsrtroy · **Posted:** Wed Mar 25, 2009 5:36 pm

does the rear diff need the additive?

JeepinJarhead03 · **Posted:** Wed Mar 25, 2009 6:07 pm

-if- it has a truetrac, which was an option

KJ Willy · **Posted:** Wed Mar 25, 2009 7:01 pm

Amsoil all around

Thanks JJ, recieved the package today.

gsrtroy · **Posted:** Wed Mar 25, 2009 7:43 pm

JeepinJarhead03 wrote:

-if- it has a truetrac, which was an option

how would i figure that out, would it be on the original window sticker if i can find it.

JJsTJ · **Posted:** Wed Mar 25, 2009 7:45 pm

gsrtroy wrote:

JeepinJarhead03 wrote:

-if- it has a truetrac, which was an option

how would i figure that out, would it be on the original window sticker if i can find it.

He means Trac-lock, not truetrac for the factroy rear limited slip.

Look for a green tag on the left side of the axle tube by the backing plate.

gsrtroy · **Posted:** Wed Mar 25, 2009 8:22 pm

alright thanks, if i have the limited-slip and use Mobil 1 75w-140, do i still need to add the friction modifier even though on Mobil 1's website it says it already contains the friction modifier for limited slip diffs?
http://www.mobiloil.com/USA-English/Mot ... 140LS.aspx

tjkj2002 · **Posted:** Wed Mar 25, 2009 8:26 pm

Dave08 wrote:

Amsoil: Coolant
70-140 severe gear
0-30 W. engine
Universal Auto Trans Fluid (ATF 4 compatible)

Amsoil coolant is a Propylene Glycol Antifreeze and is not compatible with HOAT coolant that is required in the KJ.Bye-bye water pump soon.

changing all my fluids

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