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03-15-2021, 12:29 PM
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#1
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New Member
Join Date: Mar 2021
Posts: 7
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Allison 2000 "Check Trans" Light Diagnostic
Bus: 2001 Bluebird TC2000 5.9 Cummins / Allison 2000 series.
So before I dive into the whole story, Im trying to read codes from the trans. It seems that I need Allison DOC software, a windows laptop, and some kind of j1939 connector. Which is all pricey. Has anyone dealt with this and can direct me in the best direction. I would appreciate it. Also, if it matters, the light is not currently on, but it should be saved on the TCM since i haven't reset anything?
The Story:
"Check trans" light came on while driving. I was stopped at a light, then on acceleration it felt like trans was slipping, then i notice the light was on. Pulled over ASAP (~2 miles) and notice the trans dip stick was popped open a bit and no fluid on the stick. Added 3.5 qt after letting it sit for like 1 hour. Start back up, no light on. Reverse was strong, then first gear felt like normal, 1 min later, light back on, no shifting into 2nd, so pull over immediately. put into neutral, then back in to gear it had nothing forward or reverse. Then it would pretty much restart this processes every time i turned it off for a bit.
Since then I bought the Bluefire 9 pin j1939 truck scanner but it didnt seem to pick up the trans code. I figured maybe since the trans light wasnt on, it couldn't read it. I had it towed to a property were Im not able to get out of first gear, so I drove it forward and reverse a bunch and left it run for like 30 mins lol. still no light but the trans felt okay. I tried again this time a bit more aggressive on throttle and longer range, but still only in 1st and R. No "Check Trans" light, but the ?"Restrict Range"? light came on for a brief second right as i was shifting to N then it was gone. The whole time i have the Bluefire reader and it didnt pick up anything. BTW Bluefire has lots of connection issues and poor customer/tech support, i returned. So now Im just looking for a way to scan my code so i can fix my rig. Again if anyone can help, or has the software that can be shared, or knows the best tool to purchase. i Would appreciate it.
Does any know if this would work?
https://www.ebay.com./itm/152427315711?ul_noapp=true
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03-16-2021, 12:12 AM
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#2
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Site Team
Join Date: Apr 2015
Location: Nanaimo, British Columbia
Posts: 450
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Hey Brokebus... this post approved just now, other one deleted. First posts with links get held for moderation. Welcome to the forum!
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03-16-2021, 12:28 AM
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#3
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Bus Nut
Join Date: Jan 2021
Location: On the road
Posts: 348
Year: 2013
Chassis: IC RE
Engine: HT570 / 3500SP
Rated Cap: 4
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Can't help to identify the cause of your transmission issue, but a far a a diagnostic tool I use a chinese copy of the Nexiq, from eBay. Works perfectly, and comes with a lot of softwares.
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03-16-2021, 07:34 AM
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#4
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New Member
Join Date: Mar 2021
Posts: 7
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Quote:
Originally Posted by ABBus
Can't help to identify the cause of your transmission issue, but a far a a diagnostic tool I use a chinese copy of the Nexiq, from eBay. Works perfectly, and comes with a lot of softwares.
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Can you send me a link to the product you have? According to the manufacturers, the link to the scanner i posted (Nexas/Nexlink) does not support Allison Trans.
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03-16-2021, 12:18 PM
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#5
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Bus Nut
Join Date: Jan 2021
Location: On the road
Posts: 348
Year: 2013
Chassis: IC RE
Engine: HT570 / 3500SP
Rated Cap: 4
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Quote:
Originally Posted by brokebus
Can you send me a link to the product you have? According to the manufacturers, the link to the scanner i posted (Nexas/Nexlink) does not support Allison Trans.
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https://www.obd2eshop.com/wholesale/nexiq-2-usb-link-software-without-bluetooth.html
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03-16-2021, 12:49 PM
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#6
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New Member
Join Date: Mar 2021
Posts: 7
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Quote:
Originally Posted by ABBus
https://www.obd2eshop.com/wholesale/nexiq-2-usb-link-software-without-bluetooth.html
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Thank you so much, That was the cheapest i saw, and i just ordered it!
and its cheaper than the quote to have a guy come scan it.
Thanks again, Ill update the thread on my progress
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03-16-2021, 02:23 PM
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#7
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Bus Nut
Join Date: Jan 2021
Location: On the road
Posts: 348
Year: 2013
Chassis: IC RE
Engine: HT570 / 3500SP
Rated Cap: 4
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You'll get the Allison Doc software with the device. If not, PM me.
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03-16-2021, 02:28 PM
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#8
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Bus Nut
Join Date: Oct 2019
Location: Wake Forest NC
Posts: 510
Year: 1998
Coachwork: Thomas
Chassis: Vista 3600
Engine: T444E
Rated Cap: 24000 lbs
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What you describe is Limp mode. You will have enough to move it only in 1st and reverse. This is normal when the TCM detects an issue.
The Shift inhibit light has nothing to do with your trouble code, that will be the check trans light. Shift inhibit light is the TCM telling your transmission not to shift into the desired range requested... this most often happens when you are rolling forward or back ward just a bit, but too fast for the TCM to allow the shift into either primary gear (1 or R)
Added 3.5 qt?
Fluid capacity of the 2000 series is 14.5 initial fill and around about 10.5 quarts so 3.5 is not very much
It sounds like you have run it dry somehow.
If the transmission fluid is very low for a long period of time, the clutches will burn up from not being able to lock up properly, and the torque converter will likely fail due to improper fluid pressure.
I can't help much more than this from here.. you are on the right track in realizing your only option now is getting the correct scan tool.
but I worry more your internals with the low fluid
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03-16-2021, 02:49 PM
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#9
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New Member
Join Date: Mar 2021
Posts: 7
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Quote:
Originally Posted by RolesvilleMarina
What you describe is Limp mode. You will have enough to move it only in 1st and reverse. This is normal when the TCM detects an issue.
The Shift inhibit light has nothing to do with your trouble code, that will be the check trans light. Shift inhibit light is the TCM telling your transmission not to shift into the desired range requested... this most often happens when you are rolling forward or back ward just a bit, but too fast for the TCM to allow the shift into either primary gear (1 or R)
Added 3.5 qt?
Fluid capacity of the 2000 series is 14.5 initial fill and around about 10.5 quarts so 3.5 is not very much
It sounds like you have run it dry somehow.
If the transmission fluid is very low for a long period of time, the clutches will burn up from not being able to lock up properly, and the torque converter will likely fail due to improper fluid pressure.
I can't help much more than this from here.. you are on the right track in realizing your only option now is getting the correct scan tool.
but I worry more your internals with the low fluid
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Yes its in limp mode or is was. I cant get the light on again. But 3.5 qt seemed to put fluid on the stick? I am also concerned about internals. I notice the underside of the bus over the rear of the trans before it connects to driveshaft is wet. Thinking some seal might have leaked slowly, got spun everywhere. its pretty caked down there. i never notice any physical drips under but recently been on the go. Im looking to change the filters now and i can figure out if i have a deep or shallow pan. i believe its deep but would you know how to tell? Ive just ordered the scanner so I will update when it arrives.
Thanks for the help!
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03-16-2021, 02:57 PM
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#10
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New Member
Join Date: Apr 2020
Posts: 7
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Your bus transmission doesnot engage, most likely pump doesnot work properly or somewhere leaking pressure, can you see anywhere leaking transmission fluid?
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03-16-2021, 03:41 PM
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#11
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New Member
Join Date: Mar 2021
Posts: 7
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I notice the underside of the bus over the rear of the trans before it connects to driveshaft is wet. Thinking some seal might have leaked slowly, got spun everywhere. its pretty caked down there. i never notice any physical drips under but recently been on the go
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03-16-2021, 04:12 PM
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#12
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Bus Geek
Join Date: May 2015
Location: Central Tx.
Posts: 2,505
Year: 1999
Chassis: Amtran / International
Engine: DT466E HT 250HP - Md3060
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Quote:
Originally Posted by brokebus
Yes its in limp mode or is was. I cant get the light on again. But 3.5 qt seemed to put fluid on the stick? I am also concerned about internals. I notice the underside of the bus over the rear of the trans before it connects to driveshaft is wet. Thinking some seal might have leaked slowly, got spun everywhere. its pretty caked down there. i never notice any physical drips under but recently been on the go. Im looking to change the filters now and i can figure out if i have a deep or shallow pan. i believe its deep but would you know how to tell? Ive just ordered the scanner so I will update when it arrives.
Thanks for the help!
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Here is some more help...
Allison 2000 technical service information from ATSG!
http://shop.ukrtrans.biz/wp-content/...gs/ALLISON.pdf
Allison 1000/2000 valve body identification
https://www.sonnax.com/tech_resource...identification
and here is the Allison JA3663en In-chassis maintenance manual for the 2000 tranny
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03-17-2021, 09:09 PM
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#13
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New Member
Join Date: Mar 2021
Posts: 7
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Quote:
Originally Posted by ewo1
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Thanks for this. I think i was able to find which filter i need.
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03-18-2021, 11:43 AM
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#14
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Bus Geek
Join Date: May 2015
Location: Central Tx.
Posts: 2,505
Year: 1999
Chassis: Amtran / International
Engine: DT466E HT 250HP - Md3060
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Quote:
Originally Posted by brokebus
Thanks for this. I think i was able to find which filter i need.
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Your very welcome, glad I can help out!
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