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2007 F150 4lo light blinks and speedometer drops

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Old 11-12-2016, 09:25 PM
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Default 2007 F150 4lo light blinks and speedometer drops

While driving in 2 wheel drive when you take your foot off of the accelerator, the 4LO light will blink, the speedometer will lose power and drop to 0 and there is a grinding. The truck drives fine and does not lose power. I have spent $900 trying to get this fixed. We replaced the Hub Solenoid and replaced the Computer.
At this point I have unplugged the vacuum hose?? so the grinding has stopped, but the engine light immediately came on. As you can tell, I am not a mechanic and just need some recommendations I can take back to the mechanic.
I appreciate any help I can get.
Old 11-13-2016, 07:51 AM
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Sounds like a cluster issue to me, need to perform a vacuum test at the IWE's also ...

Last edited by techrep; 11-13-2016 at 07:54 AM.




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