What gear oil do I need to run with the new True-Trac- syntehtic or not?

Break-in period... How long and what type of driving?

Do I need to change the fluid after 500 miles?

I'm dropping the truck off tonight to have the new gears and true-trac installed and just needed to know what fluid to pick up on the way home...

 

Good luck with install..I should have mine in next month.

 

You want to run conventional gear oil with the tru trac, with no additive. I'd change the fluid after 500 miles if you're having new gears installed.

 

Thanks guys. Re-reading what I wrote, I asked the wrong question...

With the NEW GEARS, do I need to have a greak-in period. I would imagine changing the fluid after 500 miles would be good because of the break-in...

 

Hi there,

I just recently did the 4.10/trutrac swap.

For break in I did like 5 or so heat cycles....15 minutes on light driving, then complete cool down.

The guy who put everything in put in 80w90 and after 500 miles I replaced it with 75w90 . The latter is a couple dollars more per bottle. Why, I don't know. Anyways, I wouldn't recommend changing the fluid, but that's just me....especially since your rear end doesn't have the drain bolt (making it a much more involved procedure than what I had to do). The fluid came out pristine, and I see no reason to swap it considering my stock fluid was never changed and was just fine. The only reason I would change fluid is if non-OEM (i.e. non AAM) gears were used. I've read that AAM gears are heat treated to 1500 degrees from the factory and are already broken in. Anyways, that's just my opinion. Most will tell you to change the fluid, but I really don't see the need.

 

Thanks for the info. Yea, I think changing the fluid would be recommended because of gears meshing together creating high(er) temps in the pumpkin, possibly breaking down the fluid. And not too mention, the potential for shavings...(?)

Did you do all of your heat cycles in a row??

 

yes you right on, i'd definitely change the fluid after 500 miles and then you'd be good to go.

 

Oh and i see now!!....getting those gears in so you can put a whoop'n on me at the track here come another week

 

lol... Just gettin some things done, that's all! lol You got gears, I got gears, you got a tune, I got a tune...Should be a good race.

 

i just did 4.11's and trutrac this weekend i love it !