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Shake & Rattle/knocking in reverse

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Old 03-11-2016, 12:36 PM
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NeoCowboy
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Cool Shake & Rattle/knocking in reverse

I have a 08 F-150 4x4 King ranch with 5.4L Duel fuel motor. Last year we were backing a trailer and the whole truck started shaking. Stopped, but it in forward and no problems, tried backing again and same thing. It did back up but shook worse with more gas.

We took it to a mechanic who said without even looking at it "Sounds like a reverse clutch, common problem" So we had them rebuild the trans, a few months later it did it again once but we were 300 miles from home. Since we could still back we did what we needed to do and drove home with no problems. Dropped it back at the mechanic who said he couldn't find anything and eventually had a yelling fight with my wife. We couldn't get it to happen again either until last week it did it again and she grabbed the camara to record it.

Took the truck back with the video, he had a mechanic look at it and said the transfer case mount bolts were loose, tightened them up which did get rid of a knock that we had since the trans rebuild and said that was the problem, it was binding and causing the shaking. This weekend did the same thing again.

Now the truck is back at the shop and only 100 miles or so left on the warrenty (12m/12k). So after that long story my question is if the problem really was/is the reverse clutch or if there is something else wrong that he never fixed and was just intermitent enough that we let him get away with it this long?
 
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Old 03-11-2016, 09:43 PM
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Sounds like a bunch of crap. that truck has the 4R70W.....its an excellent transmission. I don't believe they ever fixed the problem to start with......
 
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Old 03-13-2021, 06:36 PM
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Have you found the problem. I’m having the same issue, more when towing a trailer.

Originally Posted by NeoCowboy
I have a 08 F-150 4x4 King ranch with 5.4L Duel fuel motor. Last year we were backing a trailer and the whole truck started shaking. Stopped, but it in forward and no problems, tried backing again and same thing. It did back up but shook worse with more gas.

We took it to a mechanic who said without even looking at it "Sounds like a reverse clutch, common problem" So we had them rebuild the trans, a few months later it did it again once but we were 300 miles from home. Since we could still back we did what we needed to do and drove home with no problems. Dropped it back at the mechanic who said he couldn't find anything and eventually had a yelling fight with my wife. We couldn't get it to happen again either until last week it did it again and she grabbed the camara to record it.

Took the truck back with the video, he had a mechanic look at it and said the transfer case mount bolts were loose, tightened them up which did get rid of a knock that we had since the trans rebuild and said that was the problem, it was binding and causing the shaking. This weekend did the same thing again.

Now the truck is back at the shop and only 100 miles or so left on the warrenty (12m/12k). So after that long story my question is if the problem really was/is the reverse clutch or if there is something else wrong that he never fixed and was just intermitent enough that we let him get away with it this long?


Have you found the issue with your truck? I’m having this same issue on a 2008 f150. It only does it when I’m backing up a trailer. It gets violent. It’s sounds like it loading up and begins to miss and shake like it’s going to throw a rod. Any help would be appreciated. Thank you.
 
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