BMW “No Reverse” Transmission Problem

An automated transmission is just that- automated, for that reason most individuals tend to pay out quite little awareness to it until finally a major dilemma rears its unappealing head.

Photograph the situation- you are driving together in the lap of luxurious, the satellite radio blaring and the heated seats on. You have turn into accustomed to the convenience degree and wonderful driving working experience brought to you by BMW.

You make your mind up to end at the community ease retail outlet on your way dwelling to get some ice product for the kids and a bottle of h2o for by yourself. On returning to your car, you start off it up, check your rear view mirror, put the shifter in reverse and then the unthinkable occurs- the engine just revs as if it is in neutral and the car goes nowhere!

This post promotions with the explanations behind an unanticipated decline of reverse in sure BMW automated transmission geared up vehicles, specifically the 3 series and five series vehicles that use the ZF5HP19 or steptronic transmission. This includes the common 323i, 323ci, 325i, 328i, 330i, 525i, 528i, 530i, X3 and X5 types nicely as some other people crafted in the 1999 to existing design decades.

To do away with confusion, this does not utilize to vehicles geared up with the GM 5L40 E transmission, just the kinds with the at times problematic ZF5HP19. The 5L40 E has some difficulties of its possess that are beyond the scope of this post but are undoubtedly heading to be the subject of yet another.

The failure level for these transmissions appears to be quite high and is expected to turn into much more of a dilemma as time goes by.

Generally, the vehicle is functioning completely though driving ahead but when it is put in reverse there is a total and long-lasting decline of movement to back again up.

Reverse is ordinarily a major feat for any transmission to carry out- consider the needs that are placed on a gearbox as it is requested to reverse the torque of your engine so that you can back again up your almost 4000 pound vehicle.

By much, the most prevalent induce of the reverse dilemma in BMW’s is the failure of the D-G clutch drum. Exclusively, the snap ring that retains the D or reverse clutch breaks out of the clutch drum resulting in an incapability for the clutch pack to utilize.

The great information is that there is hope in regards to a proper fix. The manufacturing unit has unveiled an current aspect that so much appears to be a long-lasting repair for this dilemma.

In our tests and in conjunction with several hundred profitable repairs at our amenities, the new aspect appears to be metallurgically exceptional in several strategies.

We have found that there is an improved radius region as nicely as somewhat thicker casting. In addition to this, the grove that retains the snap ring is also relocated even further absent from the edge of the drum.

With this challenge addressed and awareness to depth in several other areas of the ZF5HP19 device, the transmission can be repaired to “greater than new” ailment by a knowledgeable transmission rebuilder / remanufacturer. In point, when appropriately repaired, the ZF gearbox gets to be very robust and can present an nearly indefinite company lifestyle.