tt383lt1

iTrader: (3)

i have a set of new gears and i havent put them in due to i have to get the car finished programmed and dynoed. so my question is how many miles do i have to put on the diff befor its done breaking in? or can i just go up on the dyno with new third member no break in?
im doing a mini tub and the 9" has to come out to do it and i figured i might as well just switch the third member out why the rear ends out of the car.

heymoej

iTrader: (67)

looks just like the one we put in a few months back........

after install,i ran it on jack stands for 5-10 minutes & then drove it around the block for a few miles & parked it.

a few weeks later on the next drive...... was about 10 easy miles & parked it again for a few weeks because of weather.

3rd trip a few more weeks went by because of weather again.........
i put about 15-20 easy miles & parked it.

4th trip i finally gave it a little gas.....5th alot more gas & so on.

yukon 4.56 gears on a 35 spline spool with the yukon bolt thru case & MT ET streets....
i am very happy with how quiet it is!!!!

i think they call for 3 easy heat cycles before going ***** to the walls.
good luck!

guppymech

iTrader: (7)

I took it easy for 500mi and have had no problems in over 3k miles. Here's a link for proper gear break-in:
http://www.ringpinion.com/TechnicalH...r_Break-In.inc

need4fun2469

I did 3 heat cycles and 500 easy miles before I hammered it.

Ethan[ws6]

iTrader: (13)

Put it in the car and drive it. If it's quite, you are good to go. There really is no reason to "break in" a gear set. However, if you put a new limited slip differential in it I would be easy on it for a bit until the clutches have time to soak up the limited slip additive and set into the steels.

Big Al

iTrader: (1)

Just as long as you break the rear end in when you buy a new car. It's always a good idea to drive a few hundred miles easy just to see if anything is wrong. But not really a necessity. Drag racers make full power passes with no break in at all.

Al 95 Z28

need4fun2469

how many of them are driving their cars on the streets on a regular basis?

Ethan[ws6]

iTrader: (13)

also a lot of them don't use an actual differential but still, what needs broken in? If you could, explain to us what driving lightly does as opposed to driving hard.