I was wondering if there is a break-in time for a Powertrax? If I need to drain the rear diff after a certain amount of time after the locker is installed, I will just use non-synthetic oil upon install. If I do not need to do this and I do not tow anything should I use 75w90 like what is in there now or will 75w140 be better for it?

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'74 CJ5
304/T15

I thought there is a break in period but Im not 100% positive, I would use synthetic fluid I use and like Royal Purple and it has a slight additive for lockers or LSDs, but now I cant remember what I used something 140 I dont know if it was 70w or 90

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1980 Jeep CJ7 Buggy
SOA, D44/ FF14B, SBC 350, SM465, NP205, 108" WB, 37" MTs

http://www.dpgoffroad.com/
http://www.ucora.org/
http://www.christianoffroad.com/
http://jeepinbyal.com/

a good couple hundred miles...and yes use thicker oil too...don't push on or off road until at least 150 miles

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02 Jeep TJ Sahara, 33's locked up front
03 SAS KJ 0n 35ish boggers(Sold )
Petersens 4wheel: http://www.4wheeloffroad.com/featuredve ... index.html

After my install, it took a couple hundred miles until I hear my first "pop" that so many people hear. I assume, it was still breaking in during that time.

I didn't replace the fluid until the 12,000 mile mark, and have been using 75w110 synthetic, split the difference since I do tow, but don't really want the heavy stuff.

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'04 Renegade 4x4
L.O.S.T. #058466
Car Domain, Updated: 2/23/2009
===_oooo
(_l_|_,\____\,_
{----__---_(olllllllo)
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My break in period was the 130 mile drive down to Wellsville to go off-roading. I've faithfully used the cheap Wal-Mart dino 75W140 gear oil rather than the more expensive synthetic. Oh, and the Power Trax is still going strong, no noises.

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Slightly modified Lt. Khaki 3.7 2004 LTD 4X4. Purchased new 8/6/03.
What I don't have....A Mag light mounted to my seat.
Original Old L.O.S.T. #000354

Nick's Pics & Mods click here: http://www.cardomain.com/ride/531173
http://www.survivaltopics.com/forums/

the breaking period on my first one was ~150 city miles and 500' down the trail
the breaking period on the second one was about 500 miles 1 good trail ride and finished it off on an easy trail ride

on my Detroit I have around 1000 miles and 6 trail rides
I was told to change the oil "after a while but sooner than normal because you use it harder than most"
The plan is to change it when the weather gets cooler

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Joe
L.O.S.T. #000391
2000 Jeep Wrangler Sport with hooks, skids, trac-lok rear.

Well, it's in and working. Ended up using 75W140 synthetic. Road manners take a bit getting used to but nothing major or unexpected...except maybe the pulling to the right pulling away from a light...just need to modulate the go pedal. Yes, and after I did read the owners manual everything made sense. I did not have the locker as it was shipped to the installer since I did not have the time or inclination to put it in. We'll see how it does off road this weekend. Thanks for the feedback folks.

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'74 CJ5
304/T15