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Breaking in 4.10's

This is a discussion on Breaking in 4.10's within the Drivetrain forums, part of the LSx Technical Help Section category; I'm getting some 4.10 gears installed this weekend. I've heard from several people that you don't have to go easy ...

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    Rice Hungry GottaHaveLS1's Avatar
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    Breaking in 4.10's

    I'm getting some 4.10 gears installed this weekend. I've heard from several people that you don't have to go easy on the car for so long. they say you just have to go through a couple heat cycles and then they will be fine. I think i read on here that I should go through a 500 mile breakin period and then change the fluid. what do you all recommend?

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    Rice Hungry GottaHaveLS1's Avatar
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    can anyone help me?

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    When I had my jeep i had a set of 4.56's put in. Gears are gears so its the same. It's 500miles like you said. After 500, change the diff fluid. During the 500, try not to get on it too hard, but you can accelerate quickly to help break in the gears. Don't drive like a granny. Try not to travel LONG distances. You want the gears to heat up and cool down, but not stay hot for long periods of time. Hope this helps.

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    Rice Hungry GottaHaveLS1's Avatar
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    thanks man

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    Senior Member INMY01TA's Avatar
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    I did mine 300 miles.

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    Veteran 0rion's Avatar
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    get 'em hot once and let the car completely cool down. Then just drive normal for the next 500 miles and stay out of it. Some people will say you don't need to break gears in....I err on the side of caution. I've never known anyone to tear stuff up by going easy on a car.

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    Rice Hungry GottaHaveLS1's Avatar
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    yea it sounds like a good idea to me. my friend has an 04 gt with gears and he said once he got them in he did some heat cycles and went straight to burnouts. but i also remember him blowing the trans in his 93 cobra by trying to do a breakstand in reverse!

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