I reset trans adaptations and it actually got way more noticeable, so I'm hoping the solenoids are my fix.Īhh I see.
Think it's those solenoids that are causing my issue.? I've drained, flushed, and replaced the trans pan/filter & fluid just recently and that made no difference in my issue. All other gears are smooth shifting, and i have no issues on downshifting, this only happens when going from 3rd to 4th. How would you describe that RPM flutter you mention.? I'm thinking about doing the valvebody solenoid replacement on mine as when I upshift from 3rd to 4th, it does a brief "jolt" forward before settling into the normal RPM range when upshifting. My thought process of the issue was the solenoid was not maintaining the proper clamping pressure for the clutches at that RPM. In 2nd and 3rd gear around the 1500 RPM mark, the engine RPM would swing (flutter) 200RPM. I reset trans adaptations and it actually got way more noticeable, so I'm hoping the solenoids are my fix. Think it's those solenoids that are causing my issue.? I've drained, flushed, and replaced the trans pan/filter & fluid just recently and that made no difference in my issue. I'm adding this DIY as another reference. Will edit later to make more clear and to include your proposals.
TRANSMISSION SOLENOID HOW TO
Once valve body is released See instructions on how to replace solenoids.
TRANSMISSION SOLENOID FREE
The unit itself can be hot so it's better to use some lint free clothes to hold the valve body. cause you need someone to hold the unit while you are releasing those 2 bolts. It's gonna be 1-2 more liters Wait until it's dripping ocasionally.ĩ) Now you will need helper. Slightly release these 2 bolts so they still holding the unit and be ready to catch dripping fluid. Unscrew all of them and leave 2 (one from each side to just to hold the unit) The locking tab is located on the bottom of the mechatronic belowĨ) NOw you are ready to unscrew all 10 bolts that hold mechatronics unit. Pull the sealing sleeve locking mechanism to the unlocked position. In red circles bolts that you need to unscrew in order to remove mechatronic unit.ħ) Unlock and disconnect the vehicle connector from the transmission (See picture) Wait a little bit until fluid stops dripping or dripping very slowly.Ħ) Then you'll see this picture. Be careful cause it's gonna be a little bit more oil inside the pan.Īnd prepare some pan under the transmission to catch dripping fluid from your mechatronics valve body. me )ĥ) Unscrew oil pan/filter and remove it. You can catch the oil and reuse it if you recently did transmission oil changeĪnd that didn't help you (lots of people start with tranny oil change e.g. Technically it's possible to do the job with the car on jack stands but I used normal car lift(I'm not a masochist )ĥ) Unscrew drain plug and drain the oil.
TRANSMISSION SOLENOID SOFTWARE
It is always better to have cold transmission oil on your head and on your shouldersĢ) Meanwhile reset your transmission adaptations by means of DIS or some other software e.g ISTA.Īnd yes, it says to reset before solenoid replacement - not after!, though I don't see any fundamental difference.ģ) Put the car into parking mode and lift the car. Technically everything is described here:ġ) Let the car to cool down a bit if it's hot. DIY automatic transmission solenoids replacement (ZF 6HP19-21 applications)
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