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Old 09-19-2018, 12:29 PM   #1
shaymcquaid's Avatar
Join Date: Jul 2018
Location: Just south of Dallas.
Posts: 63
Year: 1999
Coachwork: Thomas
Chassis: 40' MVP-ER
Engine: Cat 3126
Allison 3000 unlocking 6th

Greetings all and thanks for looking...
I did google but all the info is years old.

Allison 3000 aparanntly has an unlockable 6th gear.

It seems you need an authorization letter from Allison to allow it to be performed. Is this still the case?

There are also entityís online that offer a service to unlock when you send them the control module.
Is this the same as taking it to an Allison dealer?

I tried to skim through the porkchopsandwich thread but it is all over the place.

Is this still an option these days? Has anyone had any experience with this? Would you recommend it? Cost?

Any input appreciated.

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Old 09-19-2018, 02:12 PM   #2
Join Date: May 2018
Location: NJ
Posts: 15
Year: 1998
Coachwork: Blue Bird
Chassis: TC2000
Engine: 5.9 Cummins
Rated Cap: 30k
I would love to know this as well, when we got our bus in May, and took it down the highway; saw it went to 5th and thats it! would have loved a 6th!

Then i did some research on the trans and read you could "unlock" 6th gear, yes!

The more I read the more my spirits were crushed with all the hoops you have to jump through and cash needed for a certified company to just plug into the control module and give me a 6th gear.

I have a school bus company near me (warren county NJ) and I plan on seeing if they have any info on an easy unlock. Maybe if they can ask if they do bulk for multiple members on here?

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Old 09-19-2018, 02:43 PM   #3
Join Date: Feb 2016
Location: Indianapolis, IN
Posts: 140
Year: 1999
Coachwork: AmTran
Chassis: International FE
Engine: DT466E
Rated Cap: 84 passengers
I would direct you to these threads. Try to post any questions you may have in there. That way we keep all information in those two threads.
rensch26 is offline   Reply With Quote

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