Hello everyone !

I am once again concerned about my cars shifting. I have changed the transmission fluid multiple times, and I can NEVER replicate this when I test drive the car.

Sometimes (now 3 times in about 2 months) the car will shift hard from first to second. It's usually in stop and go traffic and it's when I am barely pressing the accelerator, letting go of the pedal and then softly hitting again to move forward. It's a hard shift. Maybe a jerk. Not that it slips in that the RMP's go up and the car won't go, but more like it jolts into second. I am hoping all it is is me hitting the accelerator at just the right time, but maybe there are some steps I should be taking to prevent a failure: changing solenoids maybe? Maybe a new TPS? Keep in in Sport mode or no? Should I start saving for a new transmission?.....usually the car is smooth and I can't feel it shifting no matter how many times I tried to duplicate the same scenario in a empty lot and different speeds. Any help welcome

 

At least check the battery is excellent and then only if it is check fuel trims as a small air leak can cause mayhem.

 

I am having the same problem. When shifting from 1 to 2 i feel something like a little jerk. This is my 2nd transmission in this car. I hope its not a bad sign.

 

yes. New battery and cables went in the first week after the car was delivered.

I have no lights on. My OBD2 reader shows my fuel pressure from 54-56. I am not sure how to check fuel trims though

 

I hope not. Is it always happening? I am leaning towards a new TPS/throttle body based on my experiences with my other X type, but that's a 600 dollar experiment.

 

It does not always happen, Checked it out and discovered my driver side shaft that goes into the gear box is a bit loose. Will need to change the shaft entirely and hope it solves it.

 

I dont know that that would cause a hard shift though.

How hard is it to access the valve body, I wonder. I Maybe new solenoids ? If it's not cost prohibitive to replace the 1-2 and 2-3 solenoids I would like to have that done.

its such a pain to have to baby the accelerator to prevent a hard shift or a jolt

 

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