Bluebulldog Posted Friday at 11:49 PM Share Posted Friday at 11:49 PM What’s this switch 2015 pinnacle mp8 m drive. Not the disable the other one. Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/ Share on other sites More sharing options...
Joey Mack Posted Friday at 11:50 PM Share Posted Friday at 11:50 PM Engine brake.. Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/#findComment-587012 Share on other sites More sharing options...
Bluebulldog Posted yesterday at 02:35 AM Author Share Posted yesterday at 02:35 AM What it adjusts how quickly it comes on? Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/#findComment-587017 Share on other sites More sharing options...
Joey Mack Posted 17 hours ago Share Posted 17 hours ago If im right, down is low engine breaking, and up is high engine breaking. Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/#findComment-587026 Share on other sites More sharing options...
Bluebulldog Posted 5 hours ago Author Share Posted 5 hours ago I think that is on the 3 position engine brake switch. Off high and low. Read somewhere it adjusts like the differential between cruise settings and when the brake comes on coasting down a hill but really have no idea. Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/#findComment-587080 Share on other sites More sharing options...
Joey Mack Posted 5 hours ago Share Posted 5 hours ago Ok. Could be.. i have been away from those models for 7 years or so and have forgotten a lot... Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/#findComment-587082 Share on other sites More sharing options...
The Rubber Duck 006 Posted 5 hours ago Share Posted 5 hours ago On 12/12/2025 at 6:49 PM, Bluebulldog said: What’s this switch 2015 pinnacle mp8 m drive. Not the disable the other one. That's Mack’s Brake leash. Your high low switch is above and that switch is to set the max Mph when you want it to kick in. Next time you're driving set your cruise and turn your engine brake on then hit that button. It should come up on your dashboard Screen "Brake leash" and it will have what speed you want it to come on at and what speed you want it to bring you back on to. Sorry I'm a little late for the party on this one. Example : Truck is governed at 70mph so cruise is set at 70mph Then Brake leash Parameters are Set at say Top speed 73 and the engine kicks on The speed lowest is 70mph so when the truck gits back to 70mph the engine brake shuts off. Basically a Volvo thing put in a mack truck especially in Automatics. Hope that helps I've driven several with the Indestructible M drive!! Very good Transmission especially with the right HP out front. Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/#findComment-587086 Share on other sites More sharing options...
Bluebulldog Posted 5 hours ago Author Share Posted 5 hours ago Thank you. We bought this last summer for a farm truck that my daughter could or all help for that matter could help move corn. I’ve got a nice 613 that I like but boy this thing really rides and drives nice. I like the fact that every one can get in it and it will work the same. Just can’t rough house it like you can a manual. It has the fleet shift pad I may take it and have that upgraded just to have some choices how it comes out of a field loaded. Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/#findComment-587087 Share on other sites More sharing options...
The Rubber Duck 006 Posted 3 hours ago Share Posted 3 hours ago 1 hour ago, Bluebulldog said: Thank you. We bought this last summer for a farm truck that my daughter could or all help for that matter could help move corn. I’ve got a nice 613 that I like but boy this thing really rides and drives nice. I like the fact that every one can get in it and it will work the same. Just can’t rough house it like you can a manual. It has the fleet shift pad I may take it and have that upgraded just to have some choices how it comes out of a field loaded. You're welcome. It can be rough housed just have to push the right dash buttons like taking the hill assist and traction control out of the equation. Also should have a mud snow button which would help as well. Also the plus minus buttons come in handy for controlling performance of the M drive as well. No upgrades required Quote Link to comment https://www.bigmacktrucks.com/topic/76230-dash-switch/#findComment-587091 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.