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Topic: Allison HD 4060R question (Read 974 times) previous topic - next topic

Allison HD 4060R question

Started the coach yesterday for the first time in about 45 days. Temperature was low 50's and engine started fine. Warmed up for about 10 minutes and pressed "D" on Allison control panel. Indicator changed from solid "N" to a flashing "6" and no response from transmission. Had to hold "N" button for about 5 seconds to cancel "D" selection. Same response when shifting into reverse ( flashing "R" w/ no transmission response). After several tries with no changes I ran engine speed up to 1800 in "N" for a few seconds. Transmission then began to shift normally. Have not been able to find any reference to flashing "6" or "R" in Allison manuals. Coach has been run every 30 - 45 days but not moved since early December.  Anyone know what the flashing indicators mean ?
Jon Harris
1995 U300 Unihome
Cat 3176
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Re: Allison HD 4060R question

Reply #1 –
Quote from: Jon H

Started the coach yesterday for the first time in about 45 days. Temperature was low 50's and engine started fine. Warmed up for about 10 minutes and pressed "D" on Allison control panel. Indicator changed from solid "N" to a flashing "6" and no response from transmission. Had to hold "N" button for about 5 seconds to cancel "D" selection. Same response when shifting into reverse ( flashing "R" w/ no transmission response). After several tries with no changes I ran engine speed up to 1800 in "N" for a few seconds. Transmission then began to shift normally. Have not been able to find any reference to flashing "6" or "R" in Allison manuals. Coach has been run every 30 - 45 days but not moved since early December. Anyone know what the flashing indicators mean ?

John,
Temperature should not be a factor.
Check fluid level.
If it had been sitting 45 days it may needed to get the fluid from the sump pump to the transmission which is why revving it may have fixed it.
RPM needs to be under 900 to shift
Brake switch may not be making contact.
Slide or "jacks up" sensors may not be making contact.
The selected media item is not currently available.Barry BEAM #16014
2003 U320 40' AGDS
Beamalarm, Foretravel technical help and specifications
"Whatever the mind can conceive and believe, it can achieve"

Re: Allison HD 4060R question

Reply #2 –
I believe that flashing indicators (and shift lockout) were due to high engine idle speed during warm up - 1000 rpm.  Haven't restarted to confirm but fairly certain that high idle speed was the culprit. Found the answer while reviewing info on Barry's website.
Thanks again Barry  :D :D :D
Jon Harris
1995 U300 Unihome
Cat 3176
The selected media item is not currently available.

Re: Allison HD 4060R question

Reply #3 –
Jon ... you need to get on the road, dude!!!
Carol & Jeff Savournin
Usta have a '93 U225 36', Usta have a '95 U320 40', Usta have a '02 U320 40'
Usta have a 2006 Born Free, Usta have a 2011 Phoenix Cruiser
Usta have a 2012 Jeep Wrangler Unlimited 4dr
"Your time is limited, so don't waste it living someone else's life."  Steve Jobs

Re: Allison HD 4060R question

Reply #4 –
Jon,

It is not a good idea to run your engine if you're going to drive the coach.  It's better to follow proper storage techniques, or drive it monthly enough to get all driveline fluids up to operating temperature.
Regards,
Brett

'99 42' Foretravel Xtreme
'14 Brown Motorsports Stacker
'05 Chevy SSR
'02 BMW R1150R

Re: Allison HD 4060R question

Reply #5 –
I agree completely !
Jon Harris
1995 U300 Unihome
Cat 3176
The selected media item is not currently available.