#4f150

I have a 2009 FX4 S/C f-150. It unfortuneatley has the all so common shifting issues but it also has the loudest "Clank" when shifting from Park to drive or reverse. Its worse on any sort of an incline and the use of the park brake has very little effect. Any ideas or similar problems? Also just put in the K&N cold air intake.....AWESOME! noticable increase in power and sounds great.

Bert

Check the park brake shoes. If they were on when the truck was driven, the lining could have fallen off the shoes and they make noise going forward to reverse.

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Bert

#4f150

checked the brake shoes, they are fine. "Clunk" still there. Dealership helpless.

Bert

If you put the park brake on and the shift lever in neutral with the engine off, see how much the driveshaft rotates in the differential.

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Bert

#4f150

Did the latest test. Firstly thanks for the help. The drive shaft rotates 1/4 to 1/2 inch with the park brake on and the tranny in neutral. Any other info/ideas?

Bert

There's a Teflon grease that's supposed to help where the driveshaft goes into the transmission. The splines get sticky and don't slide as well as they should. That may or may not be the problem but is likely.

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Bert