Transmission problem...car jerking during auto downshift and no reverse gear at all!!

[avictar]

just wanting to share with all bmw fellows- issue: 1. car jerk during 3rd to 2nd to 1st downshift 2. cannot reverse car (seems like a racing car) but can drive forward- fault: 1. during the modic test, found out the 3 valve solenoid not functioning- remedy: change the whole valve body gearbox for RM2k (2nd hand) with 1 month warranty....:top:

 

[dzuljazz2001]

just wanting to share with all bmw fellows

- issue: 1. car jerk during 3rd to 2nd to 1st downshift
2. cannot reverse car (seems like a racing car) but can drive forward

- fault: 1. during the modic test, found out the 3 valve solenoid not functioning

- remedy: change the whole valve body gearbox for RM2k (2nd hand) with 1 month warranty....

:top:

:4: thanks for the info sharing bro. :top::top::top:

 

[Herbert]

Avictar,

I had quite a similar problem last week when returning from Tj Tualang during heavy rain. "Trans Fail Safe program" pop up. All forward & reverse gears disabled, left only with 3rd gear doing 100 km to 120 km all the way home. Next morning, scanned with P.A. Soft scanner and found errors at

EGS -> 31/81 - Symptom gear check
35/91 - Gear check 3
21/31 - Turbine rev. sensor
36/91 - Gear check 4
41/C1 - Gear Check 4 (ENP)

Cleared errors with scanner. Auto gear returned to normal. I believe while travelling during the rain, water must have gotten into the connector underneath the gearbox causing the above problem.

Was it raining when your car developed the above problem?

 

[avictar]

ah no bro...it was consistent for the past 1 year from being mild to worse irrespective of weather.....always downshift....then it got to the reverse gear...no GB light indicator pop...but still did a modic test....

 

[EL118]

can we try the resetting mode - depressed accelarator for 30 sec to solve this??

 

[Herbert]

can we try the resetting mode - depressed accelarator for 30 sec to solve this??

EL118,

You can't unless you clear the error codes. After clearing the error codes with scanner, I felt gear jerked a bit when slowing down and moving forwad. I did the reset mode as what you described above. Surprisingly, it resolved the jerking.

 

[aidilj]

EL118,

You can't unless you clear the error codes. After clearing the error codes with scanner, I felt gear jerked a bit when slowing down and moving forwad. I did the reset mode as what you described above. Surprisingly, it resolved the jerking.

Guys, I thought we clarified that depressing the gas for 30sec is not a reset procedure but just a temporary setting for the gearbox to go aggressive. haywire, please jump in

 

[Herbert]

Aidilj,

I don't have the answer nor do I know but it work.

 

[aidilj]

Aidilj,

I don't have the answer nor do I know but it work.

It's okay, this has been discussed before.. http://www.bmwclubmalaysia.com/foru...-Gearbox-Reset&p=633283&viewfull=1#post633283

Just making sure nobody is misinformed

 

[mkmy]

just wanting to share with all bmw fellows

- issue: 1. car jerk during 3rd to 2nd to 1st downshift
2. cannot reverse car (seems like a racing car) but can drive forward

- fault: 1. during the modic test, found out the 3 valve solenoid not functioning

- remedy: change the whole valve body gearbox for RM2k (2nd hand) with 1 month warranty....

:top:

i happened to face quite a similar scenario in sept 2010 whereby the Reverse could not engage when i wanted to drive it out of a parking space. the Forward could be engaged but i was left with no opportunity to go ahead due to the curb obstruction. it was later towed to a workshop (behind carrefour jln kapar). subsequently i was told that the gearbox was damaged and the estimated cost of repair would be greater than undergoing a total change-out. reluctantly i got to agree and part with a huge sum of money - RM6,000 for a re-conditioned gearbox together with workmanship.

if only i knew this subtle solution much earlier as mentioned by bro avictar!

 

[tonslawed]

That was really a huge amount, I wonder whether the gear box was even damaged or not for all Transmissions For Sale really cheap in a good Arizona transmission Repair Shop?

 

[beemerback]

Yes agree that in many cases the box was not actually damaged. If the jerking continues after a reset, probably the valve could be the culprit. Replacing the valve is much more cheaper than the whole gearbox.

A used car salesperson told me this. I think the information is credible for obvious reasons. The used car guys would want to save as much costs as possible.