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Old 05-04-2015, 12:11 PM   #31
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Regarding the transmissions: While it's true that an electronic Allison automatic can technically be reprogrammed to have double overdrive, I have yet to hear of a Blue Bird owner achieving that. Allison requires approval of the OEM before making the change, and I haven't heard of anybody obtaining that from Blue Bird. We do have a few forum members with Thomas buses who have made it to the 6-speed utopia. Maybe some day.. but for now, it's prudent to assume the electronic Allison in a Blue Bird is going to remain a 5-speed.

The truth is what you speak but apparently someone has done this recently on this very forum.
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Old 05-04-2015, 12:26 PM   #32
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The truth is what you speak but apparently someone has done this recently on this very forum.
porkchopsandwiches' bus is the most recent success story in my memory, but his is a Thomas. I went a fair distance down the road of obtaining data link cable, software etc with the thought I could hack it myself, only to discover that the Allison software that does this piece of it is held very closely. Truly, though, if you (or anybody else) can figure out how to work the search feature well enough to find a Blue Bird that has been reprogrammed for 6 speed, I'd love to talk to that person and learn their technique. I've rarely been able to get high-relevance results from the forum search unfortunately.
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Old 05-04-2015, 01:20 PM   #33
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1997 16 Passenger School Bus, Wheelchair lift, A/C, Diesel 7.3, cruise

Say I were to decide I wanted to check out the bus in the link above. The 7.3L is not a deal breaker, right? Next would be to check the transmission. If it's an AT545, that's a deal breaker. Are there any other undesirable transmissions?

The next step would be to check for rust. Where am I checking for rust? How much rust is a deal breaker?

Assuming the bus has the right transmission and is relatively rust free, what do I check next? Tires? How do I determine how much life the tires have left? I assume any cracking/rot would be a deal breaker because of how expensive new tires are.

What am I looking for under the hood?

What should I look out for on a test drive? What temperature should the bus run at?

Should I check fluids? Oil/Transmission/Coolant?

Any further information on what I should walk away from would be helpful.


Thank yall,


-Austin
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Old 05-04-2015, 03:16 PM   #34
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There was one after porkchop's bus, but I think it was a transit bus.

Nat
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Old 05-04-2015, 07:58 PM   #35
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Trying to get six out of a five speed Allie? Check with Dave or KC at Cummins Allison Conversions. They can do it but recommend trading trannies. Good, knowledgeable folks, you can chat with them here...

Dave @ 865-253-1133 or KC 865-206-4789

or visit www.cumminsallisonconversions.com
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Old 05-04-2015, 08:34 PM   #36
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Trying to get six out of a five speed Allie? Check with Dave or KC at Cummins Allison Conversions. They can do it but recommend trading trannies. Good, knowledgeable folks, you can chat with them here...

Dave @ 865-253-1133 or KC 865-206-4789

or visit www.cumminsallisonconversions.com
Thanks for the reference.
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Old 05-04-2015, 09:34 PM   #37
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Heres a place to try. M & T Enterprises | Allison Transmission Repair | Allison Specialist | Allison Transmission Part Replacement | Allison Transmission Service | Factory Trained Allison Specialist Its owned by a big name modified racer from the northeast Ted Christopher. I know he does the nuts + bolts - and has a nice shop doing JUST Allison trannys. (Being a racer might be a better person telling him you want to change something-maybe better than Gus at the truck stop).Are the electronics are in his range? I'm unsure. But might be worth a call.
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Old 05-05-2015, 01:57 PM   #38
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The problem I've encountered isn't competency; there's an Allison dealer in town who I'm sure has it well within their abilities to program a new calibration. The problem is that it's Allison corporate policy to require written OEM authorization. I don't know whether that has to be submitted and inspected at Allison corporate, or if it's simply up to the dealer's integrity (and desire to keep his franchise) to play by the rules. In any case the calibration is created at Allison and released so the dealer can download it from them via internet. Still, thanks for the referrals. They may offer "alternate" approaches such as temporarily swapping the computer onto another vehicle for which a 6-speed calibration is already available.
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Old 05-06-2015, 01:32 AM   #39
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Someone might put in a call to Randy Dupree over on the Wanderlodge Owners Group. A few years ago he swapped out a CAT for an 8.3 Cummins with a MD3060 trans which came out of a fire truck. It was programmed for 4 or five speeds and he sent it out and had it programmed for 6 speeds. I believe he got a serial number for one of the models of Wanderlodge for the programming. The swap was very well documented with lots of pictures.
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Old 05-06-2015, 07:21 AM   #40
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Originally Posted by austin1989us View Post
1997 16 Passenger School Bus, Wheelchair lift, A/C, Diesel 7.3, cruise

Say I were to decide I wanted to check out the bus in the link above. The 7.3L is not a deal breaker, right? Next would be to check the transmission. If it's an AT545, that's a deal breaker. Are there any other undesirable transmissions?

The next step would be to check for rust. Where am I checking for rust? How much rust is a deal breaker?

Assuming the bus has the right transmission and is relatively rust free, what do I check next? Tires? How do I determine how much life the tires have left? I assume any cracking/rot would be a deal breaker because of how expensive new tires are.

What am I looking for under the hood?

What should I look out for on a test drive? What temperature should the bus run at?

Should I check fluids? Oil/Transmission/Coolant?

Any further information on what I should walk away from would be helpful.


Thank yall,


-Austin
I'd posted this, but because I'm a newbie a moderator had to approve it because of the link. The conversation kept going and I think people missed it.
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