How to flush out a diff
Thread Starter
Burning Brakes
Joined: Oct 2003
Posts: 959
Likes: 12
From: California CA
How to flush out a diff
I bought a new 3.90 diff off a forum member but it had been sitting around for a while in his garage and has some dirt and contamination inside. How should I flush it out? My current options are:
1. Use Kerosene and pour it through the diff
2. Use a mixture of 50/50 kerosene and oil and pour it through the diff
3. Clean it up as best as possible and install it. Then change the diff fluid after 10 and 50miles.
Note that this diff has new gears in it.
1. Use Kerosene and pour it through the diff
2. Use a mixture of 50/50 kerosene and oil and pour it through the diff
3. Clean it up as best as possible and install it. Then change the diff fluid after 10 and 50miles.
Note that this diff has new gears in it.
Pro
Joined: Aug 2003
Posts: 670
Likes: 0
From: mechanicsville maryland
I would go to pep boys they have a cleaner for electrical parts cleaner. I have used this cleaner on heads before and the oil just comes right off. Also dries by air within seconds and leaves no residue.
Melting Slicks
Joined: Mar 2003
Posts: 2,744
Likes: 9
From: FL
Cruise-In VI Veteran
Well.. You could just flush it with fresh oil... til its clean.. then change the oil after like 100 miles or so.
The Kerosene 50/50 mix might be overkill.. and I dont know if it will have any effect on the posi-internals..
The Kerosene 50/50 mix might be overkill.. and I dont know if it will have any effect on the posi-internals..
Melting Slicks
Joined: Mar 2003
Posts: 2,744
Likes: 9
From: FL
Cruise-In VI Veteran
Originally Posted by c3andc5
I use brake parts cleaner on my Jeep gear boxes and it works great. Comes in spray cans and is available at any auto parts store.
