4MG 3406B jake brake

If you touch the throttle or the clutch it kicks the jakes out, right?

 

They are set up forward cylinders or rear. I’ll be honest just half of them are the most useless thing on the truck. With both working together they are the 2nd most useless thing on the truck. I’d run it

 

At idle yes

 

The electronic motors it’s in the ECM to shut them off under 800.

It’s been a long time and I can’t remember what the name of this control box was it was an add on thing like king cruise. Only it shut the Jake’s off at idle.


I flip my switch it’s just sorta 2nd nature to me

 

Jakes will stall the engine out. Even a Cummins if it is wired straight to heads without throttle or clutch switch like many early one were. It will take it from 2200 rpm to shut down in a matter of seconds. My 25A’s on my 350 are just a on/off toggle and a 3 position toggle for 1 head or 2 heads, or all 3 heads.

 

Many Old timers that ran the old two stroke Detroit's have said that they were the only engine you could leave the jakes on at idle. They would not stall the engine. Lol