Rear end break in..
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Rear end break in..
I pretty much finished up putthing the rear end of my car back together. Still need to secure the mufflers tail piece that bubba installed. I was told that since the rear end is new it needs to be broken in.. Drive a couple miles then let it cool off, drive a couple more then cool off.. to avoid burning up the clutch pack and seals.. Can this be done on the lift? Right now I still have the car up on stands. It's raining out and I'd just as soon break her in on the lift if I'm not going to cause any damage because of the pull / angle of the half shafts.. Any thoughts?
Burning Brakes
Joined: Mar 2001
Posts: 1,211
Likes: 5
From: Nashville TN
Re: Rear end break in.. (Koz)
I would wait and drive the car to do break in. The half shaft angle on the hoist is not good. You also will not really do loading the gears or the clutch packs as there is no resistance to the tires.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Re: Rear end break in.. (Koz)
Our rear ends do not like to be run with the wheels hanging down. Every time the wheels turn over they jump.
It is not a good idea to run it on the hoist. Just break it in with short trips at first.
Alot of people just go out and drive normal and seem to have good luck. To me just avoid extended freeway trips or trail towing, as if we tow with our vets for the first couple of hundred miles.
Just looked up what came with my richmond gears and they said
Bring the rearend up to normal operating temperatures by driving 15-20 miles with no shock loading, let cool complete, then drive easy for the next 200 miles. If towing break in for 300 miles.
You will be fine breaking it in with normal driving at first.
It is not a good idea to run it on the hoist. Just break it in with short trips at first.
Alot of people just go out and drive normal and seem to have good luck. To me just avoid extended freeway trips or trail towing, as if we tow with our vets for the first couple of hundred miles.
Just looked up what came with my richmond gears and they said
Bring the rearend up to normal operating temperatures by driving 15-20 miles with no shock loading, let cool complete, then drive easy for the next 200 miles. If towing break in for 300 miles.
You will be fine breaking it in with normal driving at first.
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Re: Rear end break in.. (Koz)
I have never heard of breaking in a rear end (Or for that matter, a transmission either)
When you have it done and on the ground, U-Turns or Figure-8s will lube up the clutch packs in the Posi. Make sure that the diff has POSI lube in it and you are good to go.
When you have it done and on the ground, U-Turns or Figure-8s will lube up the clutch packs in the Posi. Make sure that the diff has POSI lube in it and you are good to go.
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Re: Rear end break in
What Norval writes is true. The ring and pinion have to mate with each other. It has nothing at all to do with the limited slip clutch packs. If you don't follow a break-in, you can easily end up with noisy gears and shortened gear life.
