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Old 08-28-2018, 02:01 PM   #1
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Comfort Drive is loose at cruising speed

2018 DSDP 4018

While driving at 60 mph, even with the adjustment set on 6, the steering feels loose. Our 2015 Ventana felt much firmer.

Has anyone else had a similar experience? Has anyone found a way to tighten it up?
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Old 08-28-2018, 03:39 PM   #2
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Ours is somewhat loose at anything above 50-55 mph. Setting CD at 6 helps considerably, but I don't believe I should have to set it that high under normal conditions. I wonder if it is a symptom of the of the 40' chassis. I have an appointment with Spartan next week and intend to inquire about this issue. Could be as simple as alignment, but I don't know.
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Old 08-28-2018, 03:41 PM   #3
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The words "loose" and "tight" are sometimes used to describe how much force the driver has to put into the steering wheel then they really mean "light" and "heavy" steering efforts. This is what the CD controls. If you read the Guided Tour of the CD (iRV2 Forums - Files - Tour of the Newmar Comfort Drive system, Rev. A), it tells how the efforts should get heavier as you drive faster and as you turn the efforts control up. A technician can tell which of these is not working with the diagnostic tool, also linked in the Tour.


These words are also used to describe how far you have to move the steering wheel to achieve a given change in lane placement, where "loose" means a lot of steering wheel motion and "tight" means very little motion. The CD has no effect on the required steering wheel motion.


The words are also used to mean oversteer and understeer but pretty much all our coaches understeer near the performance limit. The CD can't do anything about this, either.


From these posts, I can't tell what problem either of you are really describing.
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Old 08-28-2018, 03:43 PM   #4
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If you read the Guided Tour of the CD (iRV2 Forums - Files - Tour of the Newmar Comfort Drive system, Rev. A), it tells how the efforts should get heavier as you drive faster and as you turn the efforts control up. A technician can tell which of these is not working with the diagnostic tool, also linked in the Tour.
Thanks for the info I'll look thru the link.
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Old 08-28-2018, 04:25 PM   #5
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Ken, My issue is way to much steering wheel movement to keep it in my lane at 60+ MPH unless I turn it all the way to 6. Slower speeds don't seem to be an issue.
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Old 08-28-2018, 04:37 PM   #6
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Ken, My issue is way to much steering wheel movement to keep it in my lane at 60+ MPH unless I turn it all the way to 6. Slower speeds don't seem to be an issue.
Then your problem is NOT with the Comfort Drive.
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Old 08-28-2018, 04:45 PM   #7
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Ours is somewhat loose at anything above 50-55 mph. Setting CD at 6 helps considerably, but I don't believe I should have to set it that high under normal conditions. I wonder if it is a symptom of the of the 40' chassis. I have an appointment with Spartan next week and intend to inquire about this issue. Could be as simple as alignment, but I don't know.
Ken C ours is a Freightliner but I'd like to hear what Spartan has to say. TIA
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Old 08-28-2018, 04:53 PM   #8
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Ken, Thanks for the response. Did not have this issue with our prior coach on a Country Coach chassis or the one prior on a Spartan Chassis. I'll see what Spartan has to say next week
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Old 08-29-2018, 12:07 AM   #9
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OP, your dial may be defective. If CD works ok except it feels like the power steering on a caddy, and the dial has no control on feel, then the switch is defective. My experience.
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Old 08-29-2018, 12:38 PM   #10
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OP, your dial may be defective. If CD works ok except it feels like the power steering on a caddy, and the dial has no control on feel, then the switch is defective. My experience.
That's what my suspicion is too. Thx for your input
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