12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

Just lost 5th gear!!

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Old 08-25-2011 | 07:19 AM
  #16  
Purplezr2's Avatar
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From: MN
Originally Posted by dodgeguy71
The more I read about this truck the more I wonder why it is they put the "HD" behind it? Don't tow heavy in overdrive? Vibration causes nut to work loose when towing in overdrive. Use 4th gear when towing heavy? Really, 60mph on the interstate? According to Quad 4x4 it's a problem in anything that has an NV4500. Seen some things on an search talking about Chevy's having the problem. Thought it was fixed on my truck due to the year model but found out not fixed when I did not have 5th gear. Going to pick up new nut today, don't have time to let truck sit around waiting on parts from mail order. Band aid it back together and seriously start looking around. Would not mind an F550 that I could ram the Cummins off into!
Its the vibration that is created by lugging in 5th, if you shift early from 4th it will put a large load on the engine which I'm guessing causes a vibration. That said overall my truck has been real good to me, 4 years and only the injection has failed and 5th gear. I have towed in 5th since I fixed it and have had no issues.
Old 09-25-2011 | 07:30 PM
  #17  
JIM BROOKSHIRE's Avatar
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well , dodgeguy71 you just ram that cummins to my yard...ill take it and fix it.......bigjimcummins
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