Amziol LS additive
Junior User
Joined: Oct 2004
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From: Georgia
if you use amsoil fully synthetic lubes you wont need the friction modifier.
although the friction modifier makes sub-standard lube better lube, gives it what it doesent have.
although the friction modifier makes sub-standard lube better lube, gives it what it doesent have.
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Junior User
Joined: Nov 2003
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Kevin:
Thanks for the info...According to MY Ford dealer (such as he is)....there is no additive in the fluid from the factory......Cant seem to get a straight answer.
Im trying to help a chatter that I have had since day 1. The service manager told me originally that the chatter was normal with LS diffs. Unfortunately..he no longer works for the dealership...and of course the truck is out of warranty...so I thought an additive might be a cheap try before I have to tear down the diff.
Thanks for the info...According to MY Ford dealer (such as he is)....there is no additive in the fluid from the factory......Cant seem to get a straight answer.
Im trying to help a chatter that I have had since day 1. The service manager told me originally that the chatter was normal with LS diffs. Unfortunately..he no longer works for the dealership...and of course the truck is out of warranty...so I thought an additive might be a cheap try before I have to tear down the diff.
Posting Guru
Joined: Jul 2004
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Check you owners manual, it should tell you to add a couple of ounces when changing the diff oil. I do know back some time ago if I recall that a TSB was published because the wrong diff oil was used at the factory! With that said, if Ford is stipulating adding the friction modifier, one can only assume that the factory has put it in there.
There is also a TSB on LS diff. Service tech if I am correct shim and change the clutch packs!
Here a shudder TSB caused by parking brake:
Make: FORD
Model: F-150
Year: 2005
Type: TRUCK
Service Bulletin Number: 18560
NHTSA Item Number: 10017880
Summary Description:
PARK BRAKE DRAG ISSUE THAT PRESENTS ITSELF AS A VEHICLE SHUDDER TO THE CUSTOMER. *TT
There were some for clutch pacs TSB's also!
There is also a TSB on LS diff. Service tech if I am correct shim and change the clutch packs!
Here a shudder TSB caused by parking brake:
Make: FORD
Model: F-150
Year: 2005
Type: TRUCK
Service Bulletin Number: 18560
NHTSA Item Number: 10017880
Summary Description:
PARK BRAKE DRAG ISSUE THAT PRESENTS ITSELF AS A VEHICLE SHUDDER TO THE CUSTOMER. *TT
There were some for clutch pacs TSB's also!
Last edited by KevinM; Jan 16, 2006 at 03:22 PM.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
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From: Brentwood,CA
if it has l/s it came from the factory with the friction modifier. but by now if you still have chatter your clutch pack is toast and needs a rebuild which should be covered under warranty all 3 of mine were.
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Junior User
Joined: Nov 2003
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Originally Posted by ford390gashog
if it has l/s it came from the factory with the friction modifier. but by now if you still have chatter your clutch pack is toast and needs a rebuild which should be covered under warranty all 3 of mine were.
Freshman User
Joined: Nov 2004
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I have full amsoil in my 'Excursion (amsoil does have an * noting the need for the l/s additive) with the exception of the motor oil - still have reserves of Shell to use up.
I also have amsoil in my '01 gt 'stang rear and tranny.
No issues with any of them.
Chris H
I also have amsoil in my '01 gt 'stang rear and tranny.
No issues with any of them.
Chris H
Senior User
Joined: Feb 2004
Posts: 143
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From: Sand Dune, CA
I changed the gear lube because of the chattering i was getting with the stock lube. i put amsoil gear oil in my diff with no friction modifier. drove it around the block and the rear end was chattering. Put 2 oz. of Ford friction modifier in - no chatter. I've got 51,000 miles now and no problems.
Last edited by FX4dude; Jan 17, 2006 at 09:28 PM.