Possibly weak u-joints or transmission mounts
transmission down shift after fuild change
It could be that the transmission fluid is low, or it could be that mechanical parts have worn down. If so, it may be time for a replacement.
Are you sure it is the transmission that is clunking? It could be the u-joints on the drive shaft that are making the noise. When the u-joints on the drive shaft are bad, there is an audble clunk when you accelerate and when slowing down (basically the same motions you go through when shifting gears).
There are several things that can cause your Honda Accord station wagon automatic transmission not to shift down. The most common cause is low transmission fluid.
the two sensors on a transmission communicate with the computer to the engine and tells the transmission when to shift up or down....
2000 Dodge Ram Van need help my transmission down shifts and won't upshift
Type your answer here... My Allison transmission will only down shift, whats wrong with it?
1 down 5 up
Failing transmission
A very likely possibility other than problems within the transmission itself would be the transmission mount. This is a rubber bushing in a metal bracket that supports the transmission by connecting it to the frame. When the bushing becomes worn it allows the transmission to move and it is very noticeable because the hard shifting of an automatic transmission is masked or absorbed by this bushing. Hope that helps, good luck!
This is normal in a sequential transmission motorcycles use. The transmission needs a source of power to move the gears in place, if you shift more than one or two gears down, you will have to disengage the clutch to continue shifting down. You should plan your stops accordingly and shift down while stopping so that you can shift to first just about when you are rolling to a stop.
The shift solenoids are located in the solenoid pack on the FRONT of the transmission. looking down at the transmission with the hood open, it will be close to the RADIATOR. you have to replace the whole pack.