04 Shift Points.

[HLB3]

Greetings to all,

Been a lurker here for years, and finally have a request for info. I have an '04 quad cab 4x2 short bed with 110,000 miles on it. Bought it brand new in Mar '04. Have towed a 31 ft RV for ~20,000 miles rest of it easy highway miles. transmission gets serviced every 30,000 miles.

This past week a shift problem has developed. When in urban traffic I am light footed on the throttle due to traffic, 1st to 2nd is fine, but going from 2 to 3rd, it unexpectedly down shifts to 1st. Give it a little more throttle and it goes right on up thru the gears, 1 to 2, 2 to 3 and 3 to 4. Seems that as long as I drive it aggressively, it is happy. But the shift problem is when I am easy on the throttle. Spoke with my mechanic on Sat. and he recommended taking it into a transmission shop to have the shift points reflashed. I have read the transmission forum and done a search on website. see a few similar problems, but not sure if I should take it to transmission shop if it is a quick fix. Only thing I can think of different, is I unplugged RV brake controller, but cannot imagine that is the problem. Will hook it back up to check.



Thanks,



HLB3/Butch

 

[JJPage]

Light throttle shuttle shifting has been a common problem for quite a few of us. There is nothing to be re-flashed that I'm aware of. You can try adjusting your throttle valve cable, I will attach a link that will show a diagram and an explanation on how to accomplish this, read the whole thread.
https://www.turbodieselregister.com...ions-2003-2007/224368-jerky-transmission.html

If that does not help,you may have to replace your governor pressure solenoid and sensor.

 

[RDeFayette]

trans shifting

Light throttle shuttle shifting has been a common problem for quite a few of us. There is nothing to be re-flashed that I'm aware of. You can try adjusting your throttle valve cable, I will attach a link that will show a diagram and an explanation on how to accomplish this, read the whole thread.

https://www.turbodieselregister.com...ions-2003-2007/224368-jerky-transmission.html



If that does not help,you may have to replace your governor pressure solenoid and sensor.

When you say serviced did they adjust the bands or just change the fluid/filter?

If that doesn't help like JJpage said time to think about replacing the governor pressure solenoid and sensor.

If that's the case go with the GM upgrade.