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Transmission Discussion of preventative/corrective maintenance and other technical issues regarding your coach's transmission.

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  #1  
Old 4 Weeks Ago
kg4rrx's Avatar
kg4rrx kg4rrx is offline
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Default ZF power/economy switch

I can't remember ever seeing a post on this recently so I'd figure I'd ask. What exactly does the power/economy switch do? I never touch mine and just leave it in power mode.
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Old 4 Weeks Ago
Harold,Cat&Sam Harold,Cat&Sam is offline
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On our BMC , in economy mode it shifted sooner . Power mode should put the shift at a higher rpm.
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Old 4 Weeks Ago
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On the ZF it will delay the upshift and advance the downshift.

I prefer economy over the power setting as it accelerates very nicely holding it at 2000rpm. In power it likes to shift at much higher rpm. Depends on your driving style.

My understanding is this setting cannot be changed on the fly and must be done in neutral, though I have not bothered to test that.
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1988 FC-35SB 300HP/ZF (2016-current)
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Old 4 Weeks Ago
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Quote:
Originally Posted by kunzelj View Post
On the ZF it will delay the upshift and advance the downshift.

I prefer economy over the power setting as it accelerates very nicely holding it at 2000rpm. In power it likes to shift at much higher rpm. Depends on your driving style.

My understanding is this setting cannot be changed on the fly and must be done in neutral, though I have not bothered to test that.

I guess I'm going to have to play with it and see. Its interesting that its only available in neutral- that would explain not really having any effect when I hit it accidentally.
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Old 4 Weeks Ago
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Quote:
Originally Posted by Harold,Cat&Sam View Post
On our BMC , in economy mode it shifted sooner . Power mode should put the shift at a higher rpm.

I thought it was a ZF thing only!
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  #6  
Old 4 Weeks Ago
mahansm mahansm is offline
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The Allison 4060 in my coach has a mode button on the control panel. A little research revealed that with this particular programming in the electronics it changed from power mode (default at power up) to economy mode.


Power mode is more aggressive, having later upshifts and earlier downshifts. In particular, power mode downshifts early on upgrades. Economy mode will let me go up most shorter upgrades without downshifting, giving a smoother driving experience.


This is just one more thing to do transitioning from rural to urban driving along with changing from the air horns to the electric horn and changing the mode on the engine brake.
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Old 4 Weeks Ago
Clueless Clueless is offline
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Quote:
Originally Posted by kunzelj View Post
On the ZF it will delay the upshift and advance the downshift.

I prefer economy over the power setting as it accelerates very nicely holding it at 2000rpm. In power it likes to shift at much higher rpm. Depends on your driving style.

My understanding is this setting cannot be changed on the fly and must be done in neutral, though I have not bothered to test that.
The economy/power switch in my SP would work on the fly, and was a handy shift assist tool on occasion. I mostly just left it in the power position as that made the first downshift at around 2000 rpm (55 mph) instead of the 1700 rpm shift in the economy mode.
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Old 4 Weeks Ago
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Quote:
Originally Posted by Clueless View Post
The economy/power switch in my SP would work on the fly, and was a handy shift assist tool on occasion. I mostly just left it in the power position as that made the first downshift at around 2000 rpm (55 mph) instead of the 1700 rpm shift in the economy mode.
True! Works on the fly, another good option
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DFB052686 DFB052686 is offline
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x2 for "on the fly" as truth!

I use the power mode around town and it tends to give better manners for stop n go driving without bogging the engine and causing excess smoke in traffic, a little bit more engine braking at certain times as well.(the small vehicles always tend to congregate wherever in the speed vs power band it will cause me to not have any boost) the power mode is supposed to not allow shifting until 2500rpm+ from what I've gathered around here. and it shifts under deceleration a bit more aggressively as well.

the economy mode lets the engine minimize rpm, great for flatland highway cruising. otherwise not ideal IMHO for the 3208.
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