Safarifriends.org

40,000 miles ago, (in 2013), I had a Cat dealer re-program the "cruise control parameters" of my 250hp 3126 Cat powered coach to "Soft Cruise"

"Soft Cruise" as explained by Brett Wolfe, on Safarifriends Yahoo:
[OUOTE]
Soft Cruise allows a little more speed variation before going to WOT, (wide open throttle)--
(now, going over an overpass does not use the extra fuel that maintaining that exact
speed would require). Gives a little better MPG at the "cost of" not maintaining an
exact speed when on cruise-- an easy trade-off for me.
[END of QUOTE]

Yup, I did the same.

It no longer goes to WOT on a freeway overpass. Much more relaxing and better MPG.

But, if slowing down a couple of MPH on those overpasses bothers you, don't do it.

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What is the typical cost of getting the program update?

ProCycle wrote: ↑Wed Jan 20, 2021 11:03 am What is the typical cost of getting the program update?

My nearby Cat dealer Fabick Cat, (formally Fabco Cat, Weston, WI), didn't charge me anything back in 2013.

Question for all - is this done via the Cat ECM, or do they have to go into the Allison unit for the change? When the Allison place was trying to do the Pac Brake settings they had some difficulties accessing the Allison unit (I had to unhook my scangage from that data link under the dash, and they still had to use "old school" and fuss with it for a few, so this would give me a better heads up.

Thanks!!

05wingrider wrote: ↑Wed Jan 20, 2021 7:04 pm Question for all - is this done via the Cat ECM, or do they have to go into the Allison unit for the change? When the Allison place was trying to do the Pac Brake settings they had some difficulties accessing the Allison unit (I had to unhook my scangage from that data link under the dash, and they still had to use "old school" and fuss with it for a few, so this would give me a better heads up.
Thanks!!

Duane
To read and re-program my Cat the service tech connected their computer at the round 6 pin diagnostic port in my rear curb side service bay.

Thanks, Mel.
When I took my rig in to have the Pac-Brake setting changed from 2nd to 4th, the tech wasn't able to get his adapter plug to fit into the 6 pin in the maintenance bay, so I ended up taking my Scangage off under the dash so he could connect there instead (and even then had problems). I though it strange since I was able to connect my scangage to the port in the maintenance bay just fine, but it wouldn't fit into the one under the dash, forcing me to come up with a solution (I used some cannon plug pins and made a spacer for the scangage plug and taped it together - works fine, just looks kind of funky). Since the Allison place was a LOT easier to deal with, I guess I'll have to stop in and ask if that's something they can do, or do I have to go deal with the Cat dealer (they aren't overly receptive to anyone other than Earth Mover Equipment).

05wingrider wrote: ↑Thu Jan 21, 2021 8:33 pm Thanks, Mel.
When I took my rig in to have the Pac-Brake setting changed from 2nd to 4th, the tech wasn't able to get his adapter plug to fit into the 6 pin in the maintenance bay, so I ended up taking my Scangage off under the dash so he could connect there instead (and even then had problems). I though it strange since I was able to connect my scangage to the port in the maintenance bay just fine, but it wouldn't fit into the one under the dash, forcing me to come up with a solution (I used some cannon plug pins and made a spacer for the scangage plug and taped it together - works fine, just looks kind of funky). Since the Allison place was a LOT easier to deal with, I guess I'll have to stop in and ask if that's something they can do, or do I have to go deal with the Cat dealer (they aren't overly receptive to anyone other than Earth Mover Equipment).

I had to modify the ScanGaugeD connector to make it work with this under dash diagnostic port: