I made the comment about this over there. It is something I just cannot rationalize with, the excess usage of the engine brake, in flat areas + the large straight pipes etc. Jerry mentioned something about using them when shifting and I recall some trucks with certain arrangements of motor and trans., it makes sense, knocks the RPM's down a little, helps to shift. I recall Mack 5 or 6 spd (which ever you want to call it) and doing this. I never really liked that transmission, the spread is too far between gears. So many tandem dumps were like that.
In this stretch of road, a trucker that lays in on the engine brake in the wee hours of the morning is truly hated. There's a hamlet north of here with signs banning the use and for good reason.
You had to be a real truck driver back in the day, and know how to handle the truck you drove with the load on, an engine brake for certain was a nice thing to have with a heavy load on a down grade, but not 100% necessary if you knew how to drive and all the brakes were in good order.
Heck I lost a range in a 13 speed with a D8K with ripper on a 60 ton lowbed on Rt 78 headed to Rt 287 in NJ in '93, headed downhill. The air gauge was going down quickly and I had to figure out how to deal with it, with a 90,000 lb monkey on my back. That D8K was delivered to Foley Cat in Piscataway safely and is where the repair was made to the '72 heavy spec Autocar I was driving and I took out a new D8N afterward. Had I panicked, that rig and me would have been in some sort of crash. No engine brake. Just the transmission and brakes. I figured out that I could stop the trans air leak, and used those gears to get safely to their yard.
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