Harsh Shifting - Replaced Valve Body

[JT202006]

Posted on here numerous times about my harsh and clunky shifting. Dealer finally recognized it as a problem and replaced the valve body. The write-up states the valve body was "shorting" it also seems like they re-used the fluid. I'm no auto trans guru and wanted to see what you guys think about this. Brand new Jeep already needing a major repair like this seems not ok? What makes a Valve body short out in the first place?

Sponsored

 

[ShadowsPapa]

Just like any other electric device. Why would this be different? And yes, modern fluids in modern SEALED transmissions - no surprise they'd pump it out, use it again. It ain't cheap fluid.
It used to be a transmission shifted when governor pressure over-came throttle pressure. It was a balancing act that included springs. There was no other input other than a link to the throttle either via cable, linkage or a vacuum modulator sensing engine manifold vacuum (low vacuum meant heavy load and increased throttle pressure in the transmission.
Now you have so many other inputs - and it's "computer controlled". This actually dates back to the 1990s - there was a transmission control computer box for the automatics used in Jeeps in the 1990s.
It's gotten more complex - shifting is controlled not only based on load and road speed, but engine temperature, trailer load and more.
These can malfunction like anything else - and of course any electrical problem to most people is a "short" because they don't know the difference between a short, open, or ground........... so it's automatically called a short no matter what it was.
Why did it fail? Why did the NAV in my wife's Grand Cherokee stop accessing satellite information and lose the codes enabling it to make such access?
Why did the batteries in her GC both fail?
Why did we lose over 200 system boards in our computers in the government agency I worked in due to failed capacitors?

 

[Shootist]

Why did it fail? Why did the NAV in my wife's Grand Cherokee stop accessing satellite information and lose the codes enabling it to make such access?
Why did the batteries in her GC both fail?
Why did we lose over 200 system boards in our computers in the government agency I worked in due to failed capacitors?

I am going to go with this.

 

[ShadowsPapa]

I am going to go with this.

blame the cat.............

 

[Renegade]

Just like any other electric device. Why would this be different? And yes, modern fluids in modern SEALED transmissions - no surprise they'd pump it out, use it again. It ain't cheap fluid.
It used to be a transmission shifted when governor pressure over-came throttle pressure. It was a balancing act that included springs. There was no other input other than a link to the throttle either via cable, linkage or a vacuum modulator sensing engine manifold vacuum (low vacuum meant heavy load and increased throttle pressure in the transmission.
Now you have so many other inputs - and it's "computer controlled". This actually dates back to the 1990s - there was a transmission control computer box for the automatics used in Jeeps in the 1990s.
It's gotten more complex - shifting is controlled not only based on load and road speed, but engine temperature, trailer load and more.
These can malfunction like anything else - and of course any electrical problem to most people is a "short" because they don't know the difference between a short, open, or ground........... so it's automatically called a short no matter what it was.
Why did it fail? Why did the NAV in my wife's Grand Cherokee stop accessing satellite information and lose the codes enabling it to make such access?
Why did the batteries in her GC both fail?
Why did we lose over 200 system boards in our computers in the government agency I worked in due to failed capacitors?

Because...

 

[takeitsleazy]

Posted on here numerous times about my harsh and clunky shifting. Dealer finally recognized it as a problem and replaced the valve body. The write-up states the valve body was "shorting" it also seems like they re-used the fluid. I'm no auto trans guru and wanted to see what you guys think about this. Brand new Jeep already needing a major repair like this seems not ok? What makes a Valve body short out in the first place?

Following, thanks for the pictures. How often did this happen to you? I have the same issue downshifting at low speeds, but it doesn’t always happen

 

[JT202006]

Following, thanks for the pictures. How often did this happen to you? I have the same issue downshifting at low speeds, but it doesn’t always happen

It happened almost every stop. The valve body did cure the "clunk" i got when stopping, however still having rough shifting problems

Sponsored