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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 01-08-2020
lucaswillemse's Avatar
lucaswillemse lucaswillemse is offline
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Location: Paramount
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Default Alison 4060 Transmission modification

I followed up with W.W.Wiliams in Phoenix and they can do the Alison Mod to stop the downshift to 4th gear when using the jake brake. Their cost is $215.00 per unit. However their charge for portal to portal is over $1500.00 It will be cheaper to just drive to Phoenix for this update.

Has anyone ever just disconnected the signal going to the transmission to tell it to shift down to 4th?
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1995 WB 42
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Old 01-08-2020
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Randy Dupree Randy Dupree is offline
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Ed Wimberlys speed sensor went bad and he had to be towed home,i don't think your plan will work!
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2000 LXI 43
Bainbridge,Ga.
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  #3  
Old 01-08-2020
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Ed Wimberley Ed Wimberley is offline
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You most assuredly will not like it disconnected. It can and will refuse to shift into 6th gear. I could limp home with that 45mph is sorta ok.
However while attempting to limp it home it decided to shift into FIRST gear at 40 + mph NO NO NO Could have ripped entire drive line out. Slowly very slowly I crawled up the exit ramp and called for a tow.
New speed sensor scheduled to arrive Jan 13.
HD 4060P needs sensor # 29544139
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