6×2 question

The ecas light has been on and off for about 6 weeks. Because it would go out I never thought twice about it.
I think I first need to see what's going on with this and how it may be related to the proportioning valuve.
After 25 plus mins of Google not only can I not find the relation I can't find anything on ecas that's not on this site.
I will be ordering the manual Tommrow.

 

Is the prop valve what controls the ecas?

 

I just wanted to reply that I seen your mesg. I will respond better either in a lol bit or first thing in the am.

 

Ok the good. This truck is crazy good with the fuel mileage at 68 to 72. Very impressed. The short hood still messes with me sometimes on how much space I need.
What I learnt......The load will almost all was transfer at a dead stop. About 96% of the time. Meaning it drains the air from the dummy axle and sends it to the drive axle.(air bags) But even still, atleast with my heavy foot. I either have to knock it down to a lower gear and or coast slightly forward before I give it fuel. Or I will just sit there and burn that rubber off. Loaded or not. And on wet ground with gravel. Yup I just dig a whole.
Dumping the suspension will help tremendously in reverse. But its got to be fully dumped. Where the trailer is practically sitting on the drives. Especially if backing on any kind of incline.
Snow is not a problem at all when I drive like I have some since. Such as locking it in manual when coming down a ramp in a snow storm in Vermont or new York. On ice I just gotta be relaxed and let every one go first. Get some momentum and pray to God I don't have to stop. I had to get 7, 6foot tows from other drivers this winter. To get back on traction. In all fairness I did pull two day cabs out of the banks so I guess its ok.
As mentioned way back in this thread flipping the switch where it says don't engage in a spin out. Only sends power to the other end of the same axle.
So the four times I didn't park right. Well yeah I had to be pulled forward.

Ok now the kinda good and kinda bad. I did one time and only one flip the atc switch. I noticed no difference what so ever. So I never used it again. Then a driver in a logging truck explained how to use it. And how it was different from the diffs. Made the second half of winter almost pleasant in this truck.
The owner of the truck did change out something in the ecas system which really helped a lot.
I don't know what it is. But it made a huge difference. Extremely better on take off with dry or wet ground.
How ever a new problem has started. The load don't transfer any more. At all. I really don't want him to fix it. But he's gona anyway.
I'm fairly certain the spinning was coming from to much weight on the drives. Since it don't automatically move the air around its a much better truck. If you don't mind a automatic, run mostly flat land and are willing to some how get power to both axles I would strongly suggest this truck to you. But if mountains and snow and lack of wanting to work that axle is your thing. I would just move along. Mountains are a issue because its a dd13 not dd15. But some say I just don't know how to drive. I hope this helps.

 

On the flats at 68 mpg. And 41k in the box. Starting off easy, watching the rpms and seriously taking my time to get up to speed I've seen 9.3 last fall. And over all average mountains and flats during the winter is/was about 6.4. Also don't idle much.

I really want the boss to put in that secondary drive axle.I'm sure ill loose a little mpg. But there's a little to spare I guess.