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Old 09-27-2017, 11:03 AM   #1
Join Date: Aug 2015
Location: Gold Canyon, Arizona
Posts: 35
Scary transmission glitch-99 Tradewinds

on two occasions while traveling this summer the Allison trans on my 99 Tradewinds suddenly shifted into neutral and would not respond to any input from the keyboard. Here's the scary part: on both occasions I was on an approximate 8% upgrade at about ten thousand feet in the Colo. mountains. FORTUNATELY both times I was very close to the top of the grade and my momentum (barely) carried me to the top of the pass and I was able to find a somewhat level spot before starting down hill. Both times after sitting at idle for awhile the transmisson responded to all key inputs and was fine. Needless to say I stayed out of the high Mountains for the rest of the trip and the transmission was and still is acting just fine. By the way, the command module was replaced a couple of years ago ($$$$$$). My question to you is what in heck caused it to do that? I'm going to have it checked out of course but just thought I'd ask for your thoughts on it. I'm "transmissionly" uneducated and my only theory is maybe it is just slightly low on fluid and that, coupled with the steep upward angle caused it somehow(?)

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Old 09-27-2017, 11:01 PM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 18,609
Details in this file , on checking fluid level and codes with the shift pad.
First place to look when having issues with your Allison.
Attached Files
File Type: pdf Allison trans codes.pdf (425.7 KB, 31 views)

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 09-29-2017, 11:23 AM   #3
Join Date: Aug 2015
Location: Gold Canyon, Arizona
Posts: 35
Trans glitch

thanks much. I'll run that oil level procedure & see what it tells me.
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