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Grudge Box, cruise won't engage at 6th gear

Started by ThomasT, April 20, 2024, 07:57:15 PM

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ThomasT


New Baker Grudge box added in the fall.  Cruise stopped working "most of the time" and I just isolated yesterday that it still engages at 5th gear, but not 6th when I really need it most.

2022 Harley Tri Glide Ultra
Old man living!
2022 Tri Glide Ultra - Grudge Box - Dakota Digital

rigidthumper

Need to figure out how to recalibrate your BCM for the RPM difference @ speed. It used to be as simple as changing the vehicle speed sensor (VSS) data in the map with TTS or PowerVision, but HD quit using a VSS with the 2021 touring models. Might be worth a call to Baker to see if they have any options.
Ignorance is bliss, and accuracy expensive. How much of either can you afford?

kd

The Baker instructions that would have been sent with the transmission discuss the need to introduce your motorcycle to the new Grudgebox ratios if you want cruise control. You can go to their website for more information if you need to.

The GrudgeBox transmission is 250 RPM overdrive in 6th gear.  If your cruise will engage in 5th gear, the system is working.  For now while waiting to remedy it (or ever if you wish) set cruise in 5th gear and shift without the clutch into 6th.  By not disengaging the clutch with the clutch lever, you trick cruise into staying engaged.

Try a search on this site.  IIRC Ohio HD has posted the gear ratio you may need.  The input "codes" can depend on the tuning device you use.
KD

Ohio HD

Quote from: kd on April 22, 2024, 06:58:08 AMTry a search on this site.  IIRC Ohio HD has posted the gear ratio you may need.  The input "codes" can depend on the tuning device you use.

The tool that Dyno Jet sent to me makes a calculation based on the two transmissions gear ratio differences, and also against the MAP gear ratios for that bike. Not all MAP gear ratios are the same for an OEM six speed, I've seen them change by different year bikes. So unless he has a PV or TTS now, I don't know how you would adjust the ratios and hopefully the speedometer to match the GB transmission.

This is what the spreadsheet looks like from Dyno Jet. I assume this would work for TTS as well, but I don't know that for a fact.