Strange sound from 2nd to 3rd shift..... - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 04-26-2013, 02:52 PM Thread Starter
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Strange sound from 2nd to 3rd shift.....

For a while now I've been noticing a bump or thud when my truck shifts from 2 to 3. Doesn't effect the performance of the truck and doesn't do it on any other shift. Also the sound seems to be more from the rear of the truck. Looking for some ideas on what might be causing this.


2005 F250 CCSB 4X4
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Last edited by Sesco4; 04-27-2013 at 02:19 AM.
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post #2 of 2 Old 01-10-2014, 05:20 PM
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Did you solve this issue? Has it gotten worse?

I first had this only when towing, now I'm noticing it during daily driving. I thought it could be driveshaft related and maybe not tranny. I put in a new rear driveshaft carrier bearing today, didn't help. The u-joints didn't have play, but I may replace those next so I could rule out the driveshaft.

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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