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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 01-19-2020
flyingjunebugs
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Default ZF transmission shifting like a city bus.

Hi Folks,
Wish I knew this when I bought my 87FC.
Passed on this info to the new owner.
ZF setup the shift points for city bus driving.
Driver sees an opening in traffic, puts the throttle to the floor.
When the bus reaches his desired speed, let’s off on the throttle.
Stops, unloads, reloads, finds a hole in traffic, floors the throttle.
All day long.
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  #2  
Old 01-19-2020
1984Lodge's Avatar
1984Lodge 1984Lodge is offline
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Location: Temple Terrace
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Check out this video, the guy is a former transit driver.... he says just that, accelerator has two positions, on and off....

https://youtu.be/9384Bo3Wyy4
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Jeff LoGiudice
1984LodgeJeff@gmail.com
Temple Terrace, Florida
1984 Bluebird PT40
#F063411 6V92TA & MT654CR
& 1986 MCI 102A3
6V92TA & HT740 (Sold)
YouTube-Gino's Garage https://www.youtube.com/user/xjrjeff
http://www.bbirdmaps.com/index.cfm #460
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  #3  
Old 01-20-2020
7723
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It's probably better for the transmission to keep your foot in it rather than feathering it around. It's my understanding that he tranny slips more at partial throttle...
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  #4  
Old 01-20-2020
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kunzelj kunzelj is offline
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I run mine in eco mode instead of power. I find it shift sooner and better suited to my driving style. The power mode seems too aggressive to me.

The ZF has a mind of it's own.... and it's in a tan coloured box under the shifter. That computer works well for the most part, but downshifting on a hill is where it's very different than an Allison.
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Jeff Kunzelman
Oakville, Manitoba, Canada
1988 FC-35SB 300HP/ZF (2016-current)
1978 GMC Royale 26' (2015-2016)
1982 FC-33SB 250HP (2007-2009)
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  #5  
Old 01-21-2020
mattafact mattafact is offline
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Location: Hanford
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Quote:
Originally Posted by kunzelj View Post
I run mine in eco mode instead of power. I find it shift sooner and better suited to my driving style. The power mode seems too aggressive to me.

The ZF has a mind of it's own.... and it's in a tan coloured box under the shifter. That computer works well for the most part, but downshifting on a hill is where it's very different than an Allison.

I'm the new owner of Bruce's FC35 and I have to agree. I did some large grades today on my way home and getting it to drop a gear was rather strange. It did great though and wasn't as slow as I was afraid it would be.
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Matt M
Central Valley, CA
1987 FC35
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  #6  
Old 01-21-2020
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Gene Mehr Gene Mehr is offline
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At 1800 rpms push peddle to the wood then it will shift down. Wait to long and you will drop out of power curve
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Gene Mehr
Marcia Mehr
1988 FCSB Silver Edition
82 FC 33 250 left me for another
Sumner Wa.
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  #7  
Old 01-21-2020
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DFB052686 DFB052686 is offline
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Join Date: Feb 2017
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This is good info, anyone have further explanation of why it would fail to downshift when it gets to lower rpm/road speed? Am I just not “flooring it” enough?
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-Dennis (direct email please! dennis@wanderlodgeowner.com)
Hesperia, California

1987 FC31 “A Rare Bird”
(300HP 3208TA/ZF)

Towables:
2007 Grand Cherokee CRD, 28’ Wells Cargo Express Wagon
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  #8  
Old 01-21-2020
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kg4rrx kg4rrx is offline
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You have to push hard. There's definitely a switch you'll feel.
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Chris Henry
Fayetteville, GA
87FC
kg4rrx@gmail.com 404-547-1951
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  #9  
Old 01-21-2020
mattafact mattafact is offline
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Quote:
Originally Posted by kg4rrx View Post
You have to push hard. There's definitely a switch you'll feel.

I felt no switch on mine. I guess I better get under there and see what's up.
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Matt M
Central Valley, CA
1987 FC35
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  #10  
Old 01-21-2020
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Darryl Darryl is offline
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Bill Pape wrote about adjusting the switch. If I remember right it’s pretty touchy.

D
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Darryl and Rita
Daytona Beach, FL
87 35' FC
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