2000 disco II auto

The truck is slipping (mild) in 3rd and 4th gear. when you go through the gears manually it doesn't slip at all. I replaced the transmission filter and fluid and the problem is still there. the vehicle doesn't hesitate going into gear when you start it up it's only while driving. I thought it might be a pump seal, but with no hesitation upon start up i have ruled that out. could it be a solenoid?

I took it to the shop and it's putting out two codes:
active code is p0734- gear 4 incorrect ratio
pending code is p0733- gear 3 incorrect ratio

any help would be greatly appreciated.

 

ah the search function. sorry about the post. cleaning the MAF out now, and waiting for a new air filter.

 

If you didn't clean the MAF when it was stone cold, then reinstall after totally dried, it will most likely fail and need to be replaced.
I am thinking that since you don't have any of the other codes that would show up with a failing MAF, like running too rich or lean or one of the 100-1004 codes, that you have have another issue, especially because when a 733 or 734 code shows up together it is more likely a tranny issue.
Let us know what you find?

 

Are you saying the D2 MAFs can be cleaned this way? As long as I can remember, all I have ever heard was D2 MAFs CANNOT be cleaned. I have never had a problem with mine, but I couldn't see the harm in cleaning one with electrical cleaner, and would only think of doing it cold.