Transmission wont shift into 3rd gear,Need help

DEP · 02-08-2007, 10:58 AM

Hi Folks,I have a 99 2500 diesel with a automatic transmission,it has 125,000 on it,very little towing.It has the tow package however.Tranny cooler and other goodies.The past 4 months it has had trouble shifting into 3rd gear,you have to let off the pedal then somtimes it would go in gear,most often not.I took it to the dealer they said it might need a re-build....Has anybody had this happen to them or do they know of any such thing....I can see if I towed every day,but this is rediculis. Need help on this one.

bradrhale · 02-10-2007, 08:16 PM

does it show any codes?? could be defaulty tps. it will cause the tranny to go into a lower hole when needed but will not let it upshift back once you make it over a hill unless you pull your foot completely out of it.

Faxcion · 11-11-2009, 01:46 PM

My trucks an auto too, and it will have a hard time shifting out of 3rd if i revmatch out of drive and down to third, rod on it and stick it back in drive. I duno man, its just a GM thing, plus i've got almost 200k miles on the original tranny so im thinkin' its just a matter of time.

bradrhale · 11-11-2009, 04:17 PM

02-08-2007, 11:58 AM

old thread.

02-08-2007, 10:58 AM	#1
DEP Junior Member Join Date: Feb 2007 Posts: 3	Transmission wont shift into 3rd gear,Need help Hi Folks,I have a 99 2500 diesel with a automatic transmission,it has 125,000 on it,very little towing.It has the tow package however.Tranny cooler and other goodies.The past 4 months it has had trouble shifting into 3rd gear,you have to let off the pedal then somtimes it would go in gear,most often not.I took it to the dealer they said it might need a re-build....Has anybody had this happen to them or do they know of any such thing....I can see if I towed every day,but this is rediculis. Need help on this one.

11-11-2009, 01:46 PM	#3
Faxcion Full Member Join Date: Jun 2009 Location: Calico Rock Ar. Posts: 32	My trucks an auto too, and it will have a hard time shifting out of 3rd if i revmatch out of drive and down to third, rod on it and stick it back in drive. I duno man, its just a GM thing, plus i've got almost 200k miles on the original tranny so im thinkin' its just a matter of time. __________________ ИO COP ИO SŦOP!

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02-10-2007, 08:16 PM	#2
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,025	does it show any codes?? could be defaulty tps. it will cause the tranny to go into a lower hole when needed but will not let it upshift back once you make it over a hill unless you pull your foot completely out of it.

11-11-2009, 04:17 PM	#4
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,025	02-08-2007, 11:58 AM old thread.