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Old Jun 10, 2008 | 04:23 PM
  #1  
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Shift Rattle

Help !!

Almost everytime my 2001 Exc shifts into overdrive, there is a rumble/shutter. If I back off the gas, it will instantly go away. I checked my U joints but they were tight. I did notice a little slop where the yoke went into the tranny ( I dont know if there should be any). The tank (as I call it) has 98000 miles and has been wonderful since I've owned it. A rear sway bar and bilstein shocks have been the only upgrades.

Thanks
 
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Old Jun 10, 2008 | 04:27 PM
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this sounds like the old ford tranny shutter!!!
but i doubt it, the 4r100 trannys are bulletproof!!! i believe your 01 has the 4r100 correct??
 
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Old Jun 10, 2008 | 08:05 PM
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Is it a 2wd or 4x4?
 
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Old Jun 10, 2008 | 11:25 PM
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More importantly, is it gasser or PSD? (Slightly different transmission for 01)
 
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Old Jun 10, 2008 | 11:36 PM
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A loose pinion nut will have the same symptoms. Just a thought if it helps.
 
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Old Jun 11, 2008 | 12:23 AM
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Sorry to leave out the details....2WD, V8 Gas. Not sure what tranny it has.

It's at my stepsons home tonight, ready to head to Florida @ 5:00 AM, 2 adults, 4 kids (and a full tank of gas}. Looks like I'll be driving a non-Ford for a week.
 
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Old Jun 11, 2008 | 02:10 AM
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Torque converter shudder is fairly common...I suppose. There is even pour-in fixes.

Try search for shudder in the Super Duty forum to see what you can try.

When was the last time you changed the fluid?
 
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Old Jun 11, 2008 | 08:04 AM
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I,ve had the truck just under a year, and havent changed the transmisson fluid. I'll take care of it when it comes back home next week. Do you recomend one fluid over another?

Thanks
 
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Old Jun 11, 2008 | 05:10 PM
  #9  
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I prefer Mobil 1 synthetic but it's not a huge deal. The stuff is only in there for 30K anyway.

MERCON is the old spec. When you flush and refill you can use MERCON (if you can find it) or the new reformulated MERCON V. If you do MERCON V make sure that you do a COMPLETE drain & refill + filter change. Just don't drop the pan and top off and mix MERCON with MERCON V.



Your user name cracks me up from some reason.
 
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