Limited slip issue? - Ford Powerstroke Diesel Forum
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Old 02-26-2011, 06:14 AM
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Limited slip issue?

I have been on the forum reading and getting advice since last June. I purchased an 05 Lariat CC FX4 with 38K on it in almost new condition. The guy that I bought it from was in a rest home - so I dealt with his son. He had no maintanence records and did not know anything about the truck. I drove it and everything seemed OK so I bought it. I brought it home had all the fliuds changed - oil, fuel filters, brake fliud and rear end fluid.
My issues are -
When the truck is fully warmed up - I have a chatter when turning at speeds below 15MPH - could this be something wrong with the limited slip staying partial locked?
When I sit is heavy traffic with a lot of idling I get a vibration when I accelearate and then let off the thottle?
I have a little white residue on the degass bottle around the filler cap.
Thank you for any advice - I know I need gauges - just need the money for them!
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Old 02-26-2011, 06:35 AM
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The chatter is probably the LS clutches. The LS doesn't "lock" so it's not "partially locked". There is a "friction modifier" for the rear diff that stops/help with the chatter. I don't use it because I don't want to lessen the grip the LS has. It's pretty limited already.
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Old 02-26-2011, 06:38 AM
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Your white residue could just be spillage, or , check the level. It is to be filled to the minimum line and no higher. Minimum is the maximum level.
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Old 02-26-2011, 10:18 AM
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clean off the coolant cap and bottle really well when the engine is at its coldest. let it sit overnight and clean it in the morning. Then that day, once the eng is warmed up, floor it a few times and see if you get more coolant pushing out of the cap.
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Old 02-26-2011, 11:08 AM
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how do you fix the chatter. mine did it the other day i think. and its only when u take off and turn
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