Dropped the truck off today to get the new 4.56's installed front and rear. Just trying to get an idea of the proper way to break the gears in when I get it back. I know the installer will go over this with me but I wanted to get every bodies ideas on it. From what I understand, approximately 500 miles is recommended for break in but I'm not sure if I just get in and drive or if there is a proper procedure to follow.

The truck is a 97 1500 4X4. I use it primarily for towing my boat which weighs in around 6500 #'s when fully loaded including the trailer. Jumping from the stock 3.55's to 4.56's should make a HUGE difference in the way the truck tows, especially on hills. Also have a Detroit/Eaton Tru-Trac being put in the rear for better traction.

Thanks for any suggestions!

 

congrats on the new gears saving up for 410s for my baby.. as for all the others questions i will be in the same boat.

 

I was told to drive it normal, say 20 minutes or so city and let them cool off. Do that a few times when you first pick it up to let the gears heat cycle a couple of times. Then just drive like you have some sense till around 500 or so then change the fluids and have fun. I've got a little over 400 on mine and I've gotten in mine a few times today. It's hard not too. I absolutely love my 4.88's with 35's. So far I'm getting about 15 mpg.

 

Here ya go.

https://dodgeforum.com/forum/3rd-gen...new-gears.html