Getrag 420 Detent Repair Kit, BMW - E46 M3, E34 540i, E39 540i/M5, Z8, S6S420G 6MT

Our Getrag Transmission Detent Repair Kit is the ideal solution for a very common, but easy-to-fix, problem with the 6-speed 420 transmission used on the E46 M3, E34 540i, E39 540i/M5, Z8.

This part is listed by BMW as BMW part number 23317506947 (23 31 7 506 947) and is described as the transmission detent spring repair kit for the Getrag 420G 6-speed transmission.

Does your shifter have a problem returning to center? Does it get stuck around the 1-2 gate or 5th-6th? Or does the shifter seem to resist going between gears? If so the problem lies with worn detent springs and pins inside the transmission. It's a well known problem that not only affects ergonomics but can lead to mis-shifts, especially on track. This kit solves that potential costly problem...

Proper centering of the shifter, and having it remain in a consistent spot, is critical for hitting the right gear during spirited driving or while on track. The problems are exacerbated in track and race conditions while the transmission shifts and twists under load (stiffer or solid bushings are a must!). As the transmission and shift linkage bind up the likelihood of a over-revving mis-shift increases substantially. While the BMW ZF 5-speed transmission is incredibly durable, this is a common issue for high-mileage transmissions, and you should plan on including this kit in any track preparation. Our kit helps to restore proper action for improved shifting accuracy, making your transmission feel new again.

This is a Genuine BMW Getrag 6-speed detent repair kit with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.