Tranny Problem - Ford Powerstroke Diesel Forum

 
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post #1 of 2 Old 08-29-2010, 03:12 PM Thread Starter
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Tranny Problem

Hey guys. I just got my truck back in March and started noticing this little "thunk" when I was at a complete stop and let off the brake to accelerate, and the same "thunk" right before coming to a stop. I assumed it was the tranny mount so I took it to a shop this passed Friday. When I picked it up 2 hours later they told me my tranny was slipping. I got in with one of the guys and he put it in drive and let off the brake, the truck didnt move, he gave it a little bit of gas and it popped real ugly and started moving. Then shifted roughly into second and wouldnt go into third. after a bit of driving it shifted to third, then downshifted back into second reving up the engine. Theyre saying the tranny needs to be rebuilt. Does this sound familiar to anybody? It seemed like it was driving fine before that. Definitely wasnt slipping and it would start moving once i put it in drive. The tranny old tranny mount was intact and they said that was never causing the "thunk" i would hear. although now when i stop it doesnt do that anymore. I drove it home real slow, it entered a limp mode where the tow/haul light was flashing. What could have caused this? Thanks

2004 F250 Crew Cab Lariat SRW FX4
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post #2 of 2 Old 01-10-2014, 04:54 PM
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Did you end up with a rebuilt tranny? I've got the 'thunk' sound going into 3rd sometimes and as I come to a stop sometimes. First noticed it while towing a few months back. Now its noticeable during daily driving.

135k miles. Regularly maintained. Tranny temp always monitored.

I was searching hoping to find it might be a bad solenoid... or anything less than time for a rebuilt transmission.

2005 F250 6.0L 4X4 Lariat
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BulletProof EGR cooler, CAT EC-1 coolant, Coolant filter, Blue spring fuel regulator, Atlas 40 FICM

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