Don't want to switch to a custom shifter, but still want tap shift with your 6L80 / 6L90 / 8L90 swap project? That's OK! The 6L80 / 6L90 / 8L90 will operate with any aftermarket or OE shifter. Just add our switch box to allow for tap up/tap down shifting capability. The switch can be mounted any place that's convenient for you.

Requires E38/E92 ECM / T43 TCM reprogramming for proper operation with 6L80 / 6L90 setups (we do that - just give us a call!) and is not compatible with E67 setups!

Requires our 8L90 Tap Shift CAN Relay for tap shift to work on Gen 5 swaps using the 8L90 transmission.

Add pigtail? Select "Yes" if you're not using a Speartech swap harness with the tap shift plug built into the harness.
Pigtail is not necessary when using the tap shift switch box with an 8L90 transmission. Our 8L90 Tap Shift CAN Relay includes everything needed.

If using this for a Twist Machines Shrifter, you must select "Yes" to "For use with Twist Machines Shrifter" You do not need to select Yes to Add Pigtail!


If you don't have a Speartech harness with the tap shift plug on it, please see here for wiring info (6L80/6L90 only).