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Old 11-27-2017, 03:10 AM   #1
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Allison-trans manufacture date

I recently checked the stamped manufacturer plate on the side of my transmission (Allison 1000MH) to get the serial #. I also noted the date was coded as 05A18.

Does that mean 2005 Apr (Aug?) 18th? The chassis is a 2005.
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Old 11-27-2017, 04:54 AM   #2
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Quote:
Originally Posted by vagaron View Post
I recently checked the stamped manufacturer plate on the side of my transmission (Allison 1000MH) to get the serial #. I also noted the date was coded as 05A18.

Does that mean 2005 Apr (Aug?) 18th? The chassis is a 2005.
I don't know but if you go hear you may be able to find out. You will need your serial number.
Customer
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Old 11-27-2017, 11:56 PM   #3
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Been there, but date info not available there that I can see.
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Old 11-28-2017, 07:47 AM   #4
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There is a retired Allison engineer that frequents the Allison forum. Might be worth sending him a message to get the information.
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Old 11-28-2017, 01:04 PM   #5
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I would say Jan 18 2005.Gm used to use the first 12 letters of the alphabet for the month.A would be Jan,B would be Feb.Thats how it was for my old Pontiacs.
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Old 11-29-2017, 04:00 AM   #6
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Thanks for the help. You know, I didn't even look for a transmission-specific forum. I've posted the query there. The manufacture date is important to me because the fluid to use depends on what part of 2005 my tranny was made. The Workhorse chassis manual lists it as follows:

LCT1000 & 1000MH - Dexronģ III (2001 Model Year Chassis through April 5, 2005 chassis build)

LCT1000 & 1000MH - TranSyndTM (April 6, 2005 and newer chassis builds)

Although... that says "chassis build." If it only depends on chassis manufacture date, my VIN is 5B4MP67G753407263. The last 6 digits are a sequence number. Can anyone decode that into a specific date?
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Old 11-29-2017, 10:20 AM   #7
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If you are wanting to change out transmission fluid, the Transyn is the way to go. I pretty sure Allison recommends this as preferred fluid now for all their rv transmissions.
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