Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Transmission issue feels like neutral

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Old Sep 21, 2022 | 08:58 AM
  #21  
Doc Olds's Avatar
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What is a "switch module on the dash" for a 2008 H3?
 
Old Nov 4, 2022 | 02:34 PM
  #22  
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Default Feels like neutral

My 2008 h3 was doing that also, i took it to the shop and the tech found a chafed wire by the transmission. He fixed that and i never had the trouble again
 
Old Oct 17, 2023 | 10:17 AM
  #23  
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Originally Posted by LeonC
I’m having same issues. I’ve done all then obvious elementary things stayed like checking and sniffing the trans fluid and also had the trans rebuilt by a reputable shop. The problem came back. He changed the TCM(transmission control module) and it helped for a while but has returned again. It was a salvage part as a new one would have to be programmed by dealer.
When removing the old one after driving a while to make it fail, the old one was very hot. Honestly I’ve done all the simple and expensive stuff too and to no avail. Had something similar happen to my Chevy pickup and changing the switch module on the dash fixed it. I’m going to give that a try but had to order it. Actuator motors and fluid changes haven’t fixed this issue and mine is doing exactly the same as in that video only not moving until you turn it off and start it back. Something is resetting to cause it to work again. Had to be electrical in my opinion but who knows. Love this 2008 H3 but frustrating.
until now I’m having the same issue
but it start to appear more frequently especially when I’m in a traffic jam.
to reset this issue i have to switch the gear to P then back to D and it will be fixed
I second you it seems as electrical problem but with no clear root cause
is it solenoids?
is it wiring?
sensor ?

 
Old Oct 17, 2023 | 12:15 PM
  #24  
Doc Olds's Avatar
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It is a worn out problem as like in this old worn out thread about how Auto Transmissions die and need a rebuild.
 
Old Oct 22, 2023 | 01:14 PM
  #25  
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This is not a Toyota where transmissions last 350,000 miles. I did mine after 250,000 miles.
 
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