How long of a break in period for new rear end gears
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Joined: Aug 2003
Posts: 420
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From: Miami, Florida
Car: 1990 IROC-Z
Engine: 350 L98
Transmission: 700R4
How long of a break in period for new rear end gears
just as the subject says... how many miles do i need to put on the car to break in the new 3.73's properly? thanks guys
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Joined: Jul 1999
Posts: 18,457
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Should have come in the instructions...
Most of the mfrs say something like drive 10 miles at 40-55 mph; let them cool down for an hour or so; drive 10 more miles 50-65; let them cool down overnight; drive normally for a couple hundred miles; then they're ready to roll. The details vary, but the basic idea is the same, of heat-cycling them a couple of times right away, then gently bedding them in to each other.
Most of the mfrs say something like drive 10 miles at 40-55 mph; let them cool down for an hour or so; drive 10 more miles 50-65; let them cool down overnight; drive normally for a couple hundred miles; then they're ready to roll. The details vary, but the basic idea is the same, of heat-cycling them a couple of times right away, then gently bedding them in to each other.
Thread Starter
Member
Joined: Aug 2003
Posts: 420
Likes: 0
From: Miami, Florida
Car: 1990 IROC-Z
Engine: 350 L98
Transmission: 700R4
i had a performance shop put them in for me, so i didnt get any instructions. when you say a couple hundred miles... you think 200 is ok? just curious... i'll do w/e i need to do to set them in the right way
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