Do I need friction modifier?
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Freshman User
Joined: Sep 2009
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From: Albuquerque, NM
Do I need friction modifier?
Hello,
I am going to be changing my front and rear diff fluids this weekend. Not sure if I have a limited slip diff or not.
I asked the dude at autozone whether I needed this, and he said I don't. It's just a 'treatment" that I can add.
Is this true?? Or should I go back and get some??
Thanks,
John
I am going to be changing my front and rear diff fluids this weekend. Not sure if I have a limited slip diff or not.
I asked the dude at autozone whether I needed this, and he said I don't. It's just a 'treatment" that I can add.
Is this true?? Or should I go back and get some??
Thanks,
John
Postmaster
Joined: Mar 2001
Posts: 4,968
Likes: 3
From: So Cal
Don't know your model year, but the mid 90s F250s had different fluid front versus back.
The rear if it is limited slip will have a tag on it that I believe says blah blah L or LS somewhere in there.
Even if you don't put in the additive you can check easily. Just do some tight slow speed turns. I seem to get most obvious results while backing out and turning tight.
If the truck chatters then you need additive. Usually 1 toothpaste tube will do.
Chattering feels like the tires are grabbing or rubbing against the wheel well.
I forget what fluid is in the front diff. I think it is ATF but I forget.
Jim Henderson
The rear if it is limited slip will have a tag on it that I believe says blah blah L or LS somewhere in there.
Even if you don't put in the additive you can check easily. Just do some tight slow speed turns. I seem to get most obvious results while backing out and turning tight.
If the truck chatters then you need additive. Usually 1 toothpaste tube will do.
Chattering feels like the tires are grabbing or rubbing against the wheel well.
I forget what fluid is in the front diff. I think it is ATF but I forget.
Jim Henderson
Thread Starter
|
Freshman User
Joined: Sep 2009
Posts: 49
Likes: 0
From: Albuquerque, NM
Don't know your model year, but the mid 90s F250s had different fluid front versus back.
The rear if it is limited slip will have a tag on it that I believe says blah blah L or LS somewhere in there.
Even if you don't put in the additive you can check easily. Just do some tight slow speed turns. I seem to get most obvious results while backing out and turning tight.
If the truck chatters then you need additive. Usually 1 toothpaste tube will do.
Chattering feels like the tires are grabbing or rubbing against the wheel well.
I forget what fluid is in the front diff. I think it is ATF but I forget.
Jim Henderson
The rear if it is limited slip will have a tag on it that I believe says blah blah L or LS somewhere in there.
Even if you don't put in the additive you can check easily. Just do some tight slow speed turns. I seem to get most obvious results while backing out and turning tight.
If the truck chatters then you need additive. Usually 1 toothpaste tube will do.
Chattering feels like the tires are grabbing or rubbing against the wheel well.
I forget what fluid is in the front diff. I think it is ATF but I forget.
Jim Henderson
I believe the front is a dana50, and will require 70W-90 gear oil. The rear requiring 75w-140.
Here's my VIN: 1FTNW21L0XEEJ6930 can anyone out there answer this one way or another??
Thanks,
John
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Freshman User
Joined: Sep 2009
Posts: 49
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From: Albuquerque, NM
Sorry if this has been asked/answered a million times already. I just want to make sure I do things right. I am still very much a shade tree mechanic, so I learn as I go.
Your help is greatly appreciated.
Your help is greatly appreciated.
Thread Starter
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Freshman User
Joined: Sep 2009
Posts: 49
Likes: 0
From: Albuquerque, NM
Roger that, will do. thank you.
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