Shifting with Jake brakes on.

I take back the jake brake / fuel economy comment. It was explained to me, but Im having a brain fart trying to remember it.

As far as braking down hills...I don't encounter hills steep enough on my route that warrant using the jake. I just stab brake a couple of times on the few hills I run across and Im fine.

Brakes are designed to stop a vehicle. Sure, the more you cram and stand on the suckers, the faster they are going to wear down. I've had my 96 chevy for about 5-6 years. As far as I know, its never had its brakes changed out...that and my uncles owned it before I did. No need to change them in the near future. Plus I've replaced them previously on my crown vic. If you are light on brake useage, they should last quite a long time. Im just not a fan of using them in residential areas.

lol gated communities. what a line. more assumptions.

 

TGA26.480 as we speak with a Tipmatic ( the button clutch)
Like the telligent too but not Volvos I-shift.
And love the RTO18...

Jake=Jacobs System...
And the EVB in a MAN seems to be a Jake system... no wonder it sounds similar...

http://www.jakebrake.com/
http://www.man-mn.com/en/Innovation_and_Competence/Applied_safety/MAN_BrakeMatic_.jsp

 

MickeyFIN said;

> TGA26.480 as we speak with a Tipmatic ( the button clutch).

Tipmatic is the fully automatic MAN gear. No clutch pedal, and no button clutch. I dont know what (if anything?), MAN calls their manual with the button clutch?

 

I came across a paragraph somewhere while reading up on HP stuff. When I read a part, it clicked in my mind.
I was told that the Jake reduces fuel mileage. Granted, it works via compression...so it doesnt use any fuel...sort of. However, the engine is still running and if you are going at a speed and slowing down...the fan kicks in, which uses engine horsepower to run, reducing fuel economy.

 

It may waste some fuel economy if you have a mechanical injected engine. If it is electronic and when the jake kicks in it cuts fuel to the cylinders applying the jake. Raw fuel going into cylinders that is not getting burnt in turns washes the thin oil film for lubrication off. If jakes wasted economy by dumping raw fuel all the time (the only way to waste fuel is to not burn it) we would see engines that only last 200 to 300 K and thats it.

 

Could you get your head a lil bit farther up your butt?

 

Now thats funny right ther, I don't care who you are...LOL

 

its called "im to lazy to lift to my fat foot and hit the brake pedal, have to save my energy for the walk inside to the buffet"

 

I have found, that with most trucks....the Engine Brake doesn't affect shifting unless you are floating, which seems to be the norm with Truckers. In the Freightliners, and I'm ony speaking for FL because that's all I have driven, when you go to upshift, just rest your foot on the clutch pedal. It disengages the Engine Brake and it won't come on while you are shifting. I learned to float pretty quickly, even though it's not encouraged by the company...it's alot easier.

 

The reason most companies don't encourage floating is simple. If you miss a shift, the rpm drops below the window and you force it in anyway, it's real easy to break driveline parts—usually the teeth on the sliding clutch dogs. But if you're loaded real heavy... the weakest link will go, and that's usually the u-joints.

It's easier to float on a tranny with more gears because the rpm spacing between gears is closer—versus, say, a 9 speed where the rpm drop is quite significant and has to be timed perfectly. After you learn the sound of the engine while double-clutching, floating will come pretty easy. Shifting at a low rpm helps too.