BMW "No Reverse" Transmission Problem
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An automatic transmission is simply that- automatic, consequently the majority of folks tend to pay out very little focus on it until a significant problem rears its ugly head.
Picture the scenario- you‘re driving along inside the lap of luxury, the satellite radio blaring and also the heated seats on. You‘ve become used to the comfort level and great driving experience brought for you by BMW.
You choose to prevent in the local convenience store on your path home to grab some ice cream for the children and also a bottle of water for only yourself. Upon returning within your car, you begin it up, look at your rear view mirror, place the shifter in reverse after which the unthinkable happens- the engine just revs as if it‘s in neutral and also the car goes nowhere !
This post deals using the reasons behind an unexpected loss of reverse in certain BMW automatic transmission equipped vehicles, specifically the 3 series and 5 series vehicles that utilize the ZF5HP19 or steptronic transmission. Including the favored 323i, 323ci, 325i, 328i, 330i, 525i, 528i, 530i, X3 and X5 models well as some others built inside the 1999 to present model years.
To get rid of confusion, this doesn‘t refer to vehicles equipped using the GM 5L40 E transmission, just those using the sometimes problematic ZF5HP19. The 5L40 E has some issues of their own which are beyond the scope want to know but they are certainly likely going to be the topic of another.
The failure rate for the transmissions appears to be very high and it is expected to get a lot more of an issue as time goes by.
Typically, the vehicle is working perfectly while driving forward but once it is insert reverse there‘s a complete and permanent loss of movement to back up.
Reverse is sometimes a significant feat for just about any transmission to accomplish- imagine the demands which are placed on the gearbox as it‘s asked to reverse the torque of your respective engine so that you could back your nearly 4000 pound vehicle.
By far, the most typical cause from the reverse problem in BMW's is that the failure from the D-G clutch drum. Specifically, the snap ring that retains the D or reverse clutch breaks from the clutch drum leading to a failure to the clutch pack to use.
The excellent news is that there‘s hope in regards to some proper repair. The factory has released an updated part that thus far appears to become a permanent fix for that problem.
In your testing and in conjunction with several hundred successful repairs at our facilities, the new part appears to be metallurgically superior in many ways.
We‘ve found that there‘s an improved radius area along with slightly thicker casting. Along with this, the grove that retains the snap ring is likewise relocated further far from the fringe of the drum.
Using this issue addressed and focus on detail in many other areas from the ZF5HP19 unit, the transmission could be repaired to
suggestion:
inch,inches,in
[click to edit]')" onmouseout="UnTip()">" better than new
suggestion:
inch,inches,in
[click to edit]')" onmouseout="UnTip()">" condition using a competent transmission rebuilder / remanufacturer. Actually, when properly repaired, the ZF gearbox becomes quite robust and can also provide an almost indefinite service life.
Picture the scenario- you‘re driving along inside the lap of luxury, the satellite radio blaring and also the heated seats on. You‘ve become used to the comfort level and great driving experience brought for you by BMW.
You choose to prevent in the local convenience store on your path home to grab some ice cream for the children and also a bottle of water for only yourself. Upon returning within your car, you begin it up, look at your rear view mirror, place the shifter in reverse after which the unthinkable happens- the engine just revs as if it‘s in neutral and also the car goes nowhere !
This post deals using the reasons behind an unexpected loss of reverse in certain BMW automatic transmission equipped vehicles, specifically the 3 series and 5 series vehicles that utilize the ZF5HP19 or steptronic transmission. Including the favored 323i, 323ci, 325i, 328i, 330i, 525i, 528i, 530i, X3 and X5 models well as some others built inside the 1999 to present model years.
To get rid of confusion, this doesn‘t refer to vehicles equipped using the GM 5L40 E transmission, just those using the sometimes problematic ZF5HP19. The 5L40 E has some issues of their own which are beyond the scope want to know but they are certainly likely going to be the topic of another.
The failure rate for the transmissions appears to be very high and it is expected to get a lot more of an issue as time goes by.
Typically, the vehicle is working perfectly while driving forward but once it is insert reverse there‘s a complete and permanent loss of movement to back up.
Reverse is sometimes a significant feat for just about any transmission to accomplish- imagine the demands which are placed on the gearbox as it‘s asked to reverse the torque of your respective engine so that you could back your nearly 4000 pound vehicle.
By far, the most typical cause from the reverse problem in BMW's is that the failure from the D-G clutch drum. Specifically, the snap ring that retains the D or reverse clutch breaks from the clutch drum leading to a failure to the clutch pack to use.
The excellent news is that there‘s hope in regards to some proper repair. The factory has released an updated part that thus far appears to become a permanent fix for that problem.
In your testing and in conjunction with several hundred successful repairs at our facilities, the new part appears to be metallurgically superior in many ways.
We‘ve found that there‘s an improved radius area along with slightly thicker casting. Along with this, the grove that retains the snap ring is likewise relocated further far from the fringe of the drum.
Using this issue addressed and focus on detail in many other areas from the ZF5HP19 unit, the transmission could be repaired to
suggestion:
inch,inches,in
[click to edit]')" onmouseout="UnTip()">" better than new
suggestion:
inch,inches,in
[click to edit]')" onmouseout="UnTip()">" condition using a competent transmission rebuilder / remanufacturer. Actually, when properly repaired, the ZF gearbox becomes quite robust and can also provide an almost indefinite service life.
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