Changed differential oil. Now have a slight vibration
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Senior User
Joined: Oct 2008
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From: Goose Creek, SC
Changed differential oil. Now have a slight vibration
I changed the front and rear diff fluids yesterday and now I have a slight vibration. It shows up when going straight but it's smooth when turning at full lock. Any ideas? I used Valvoline High Performance Gear Oil (80w90 front/85w140 rear) for Limited Slips. I test drove it and since I didn't notice any chatter when going full lock I didn't add any friction modifier since the oil had some friction modifier in it according to the Valvoline info I could find. Any thoughts?
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
I changed the front and rear diff fluids yesterday and now I have a slight vibration. It shows up when going straight but it's smooth when turning at full lock. Any ideas? I used Valvoline High Performance Gear Oil (80w90 front/85w140 rear) for Limited Slips. I test drove it and since I didn't notice any chatter when going full lock I didn't add any friction modifier since the oil had some friction modifier in it according to the Valvoline info I could find. Any thoughts?
When I used the Valvoline mine was fine.. hmm..
Thread Starter
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Senior User
Joined: Oct 2008
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From: Goose Creek, SC
Saw another thread that mentioned doing figure 8's to work the oil into the clutches (don't understand why it wouldn't get in there with normal driving) so I spent about 20 minutes doing circles and figure 8's in a gravel road area that's close to my house and it seems to have gotten rid of the vibration. I'll have to keep an eye on it since we're taking a 500 mile trip at the end of the week and I don't want to wear out the clutch pack on the drive. Guess I'll keep a tube of modifier and a 3/8 ratchet in the truck for a while.
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Saw another thread that mentioned doing figure 8's to work the oil into the clutches (don't understand why it wouldn't get in there with normal driving) so I spent about 20 minutes doing circles and figure 8's in an gravel road area that's close to my house and it seems to have gotten rid of the vibration. I'll have to keep an eye on it since we're taking a 250 mile trip at the end of the week and I don't want to wear out the clutch pack on the drive. Guess I'll keep a tube of modifier and a 3/8 ratchet in the truck for a while.
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