stranger75
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- Location
- Nashville, TN
I had an interesting experience the other day. I started up my M1009 and left the driveway. I drove about a quarter of a mile before coming to the first stoplight, giving me enough time and distance to get up to the 35mph posted speed limit. Normally, unless a school zone is in effect, this short little drive allows my truck to get into 3rd gear, which usually happens around 25 (I could be mistaken... I should take note of speed when shift occurs). This time, the truck easily shifted into 2nd at the normal time, but would not go into 3rd.
I found it odd, and decided to drive a little more to see what would happen. I stopped completely, and drove again, getting up to speed when the 3rd gear shift would normally occur, same thing. I tried putting into Park and starting over. Same thing. I could not get the truck out of 2nd gear.
While going through this little experiment, trying to see what was happening, I saw a sign for a transmission shop. I've seen it before, but have not had the need to go in. This time I did. I walked in and told the shop owner what had just happened. I informed him that it is a 4 wheel drive truck with 3 speed TH400 etc... He said the higher gear might be burned out. I'm not entirely sure what the means though. He brainstormed a little bit with me about other possible culprits including vacuum lines and fluid. I told him my fluid is a healthy red color and at correct level. He said that if I had a vacuum issue, I would have problems shifting out of first gear, as well as second, which was not happening to my truck.
The guy suggested I try simulating a manual shift by driving in 1 on the column shifter, and then shifting to 2, then D, shifting when I thought it sounded right. I tried this, and it worked fine! after going through the gears manually, I did not have a problem with the tranny shifting automatically anymore.
What could have caused the transmission to have trouble shifting out of second? Why would my manual shift cause anything to change? I am concerned that it will happen again.
My understanding of transmissions is limited. I know what they do of course, but I do not have experience with their internal workings. Any input is appreciated.
I found it odd, and decided to drive a little more to see what would happen. I stopped completely, and drove again, getting up to speed when the 3rd gear shift would normally occur, same thing. I tried putting into Park and starting over. Same thing. I could not get the truck out of 2nd gear.
While going through this little experiment, trying to see what was happening, I saw a sign for a transmission shop. I've seen it before, but have not had the need to go in. This time I did. I walked in and told the shop owner what had just happened. I informed him that it is a 4 wheel drive truck with 3 speed TH400 etc... He said the higher gear might be burned out. I'm not entirely sure what the means though. He brainstormed a little bit with me about other possible culprits including vacuum lines and fluid. I told him my fluid is a healthy red color and at correct level. He said that if I had a vacuum issue, I would have problems shifting out of first gear, as well as second, which was not happening to my truck.
The guy suggested I try simulating a manual shift by driving in 1 on the column shifter, and then shifting to 2, then D, shifting when I thought it sounded right. I tried this, and it worked fine! after going through the gears manually, I did not have a problem with the tranny shifting automatically anymore.
What could have caused the transmission to have trouble shifting out of second? Why would my manual shift cause anything to change? I am concerned that it will happen again.
My understanding of transmissions is limited. I know what they do of course, but I do not have experience with their internal workings. Any input is appreciated.
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