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Old 09-22-2017, 10:44 AM   #1
Skoolie
 
Join Date: Aug 2016
Location: Kansas
Posts: 174
Year: 1995
Coachwork: Thomas
Engine: 8.3 Cummins, 643
HT 740 transmission's

https://www.purplewave.com/auction/170927/item/DB4150

There are two at $40 right now they look like fresh re-builds.
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Old 09-22-2017, 12:48 PM   #2
Bus Nut
 
Join Date: Jun 2016
Location: Orange County, CA
Posts: 388
Year: 1990
Coachwork: integral
Chassis: Crown Supercoach II pusher
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
They look like ex-military ones. It's a tough transmission - the drag-racing trucks use them, and they normally last a very long time before needing work. If they do need work, they cost a lot less than a B500 to overhaul: those ones can cost well into five figures to repair! However, if you're thinking of putting one in your bus, they probably won't fit: they're longer than a MT-6xx, and they weigh more than 900 pounds. The D version has a deep first gear, lower than the normal first.

John
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Old 09-22-2017, 01:43 PM   #3
Skoolie
 
Join Date: Aug 2016
Location: Kansas
Posts: 174
Year: 1995
Coachwork: Thomas
Engine: 8.3 Cummins, 643
It's a larger bell housing as well or I would be trying to figure out how I could shove it in there. But I think some buses have them. If mine had a 740 I might buy it just to sit on a shelf
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Old 09-22-2017, 04:27 PM   #4
Bus Nut
 
Join Date: Jun 2016
Location: Orange County, CA
Posts: 388
Year: 1990
Coachwork: integral
Chassis: Crown Supercoach II pusher
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
You don't need a deep first gear in a bus! HT-740s are SAE 1 size, so if your engine is SAE 2 it won't fit anyway. However, as a cheap source of parts it could be worth buying if you has the space to keep it - Allison no longer supports this generation of transmissions (the AT, MT and HT). I wish I has space to keep a spare for parts.

John
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Old 09-22-2017, 05:26 PM   #5
Skoolie
 
Join Date: Aug 2016
Location: Kansas
Posts: 174
Year: 1995
Coachwork: Thomas
Engine: 8.3 Cummins, 643
Looks like they come in a handy weather tight box. Just set it on the porch
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Old 09-23-2017, 11:03 PM   #6
Bus Nut
 
Join Date: Feb 2015
Location: Cincinnati, Ohio
Posts: 515
Year: 2000
Coachwork: Blue Bird
Chassis: International
Engine: TE 444
Rated Cap: 12
this would be used in heavy trucks
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Old 09-24-2017, 10:13 AM   #7
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 7,244
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
some of the busses here at this rally have 730's. those things are HUGE!!
-Christopher
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