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Message |
Gary Belonga (Mb53)
Registered Member
Username: Mb53
Post Number: 12
Registered: 10-2006
Posted From: 71.115.149.114
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 10:31 am: | |
Can this transmission be used in conversion? We found an MCI transit bus that has this transmission it. I tried to search allison website for information on this transmission but couldnt find anything on its intended uses. like highway or intercity use.
(Message edited by mb53 on December 25, 2006) |
Kenneth Munford (Sapponyeagle)
Registered Member
Username: Sapponyeagle
Post Number: 3
Registered: 10-2006
Posted From: 207.69.140.20
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 10:55 am: | |
Hello Gary
My Allison book shows the HT 747for use in a School Bus ,City Transit Bus and a Intercity Bus.
General Rating 445hp. Sae 1 bell housing,GVW 80,000 lbs.
If I can be of any help ,let me know. Ken |
George M. Todd (George_mc6)
Registered Member
Username: George_mc6
Post Number: 52
Registered: 8-2006
Posted From: 207.231.81.154
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 11:06 am: | |
Merry Christmas Gary,
An Allison 747 is a "large" size, four speed, electronically controlled automatic. The '7' is the size. They're made in 5, 6, or 7, which is the torque, horsepower, and vehicle weight rating. 4 is the number of speeds, and the second 7 is the series built.
This trans is built for the larger engines, 6V92, 8V92, 8V71, Series 60, etc, and high vehicle weight ratings. It is suitable for either transit or highway service.
The only drawback would be its electronic controls if you are considering transplanting it into a different bus. |
Gary Belonga (Mb53)
Registered Member
Username: Mb53
Post Number: 13
Registered: 10-2006
Posted From: 71.115.149.114
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 11:22 am: | |
Merry Christmas everyone. This transmission is hooked up to a 6V92t engine in a 1987 MCI 9 intercity transit bus. No restroom and company will remove all seats if needed free. I was thinking that this would be a good starter for conversion if it doesnt have to much rust and corrision on it. Trans and engine have 150,000 miles on them. |
Bob greenwood (Bob_greenwood)
Registered Member
Username: Bob_greenwood
Post Number: 500
Registered: 7-2006
Posted From: 64.136.49.228
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 1:48 pm: | |
intercity buses usually have low top speeds |
Ray Lala (Rayshound)
Registered Member
Username: Rayshound
Post Number: 82
Registered: 8-2003
Posted From: 68.201.216.135
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 3:21 pm: | |
I have the HTB 748 which is an ATEC allison with a retarder, the 747 should be close except for the "B" designator means retarder. It came out of a 1991 Eagle, I'm installing it in a MCI-8 with a series 60 DDEC4. Ray |
Gary Belonga (Mb53)
Registered Member
Username: Mb53
Post Number: 14
Registered: 10-2006
Posted From: 71.115.128.110
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 4:03 pm: | |
If these bus's have a low top speed is there alot of work required to be able to operate them at highway speeds for cross country driving? |
JR Lynch (Njt5047)
Registered Member
Username: Njt5047
Post Number: 117
Registered: 7-2006
Posted From: 69.132.231.134
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 9:36 pm: | |
Sounds like an NJT MC9 or some other similar DDEC 1 unit. It probably has about 68 to 70 MPH redline. It's probably set at 277 HP. IF it is a DDEC 1, it can be easily bumped up to better than 300 HP. Change the EEPROM...this is only on DDEC 1 units. It probably has 3.73 rear drive axle. Unlike other "transits", most MC9s were used on interstates even in "transit" service. It is not fast...but it isn't limited to 55 MPH either.
Are you sure it has a 747 and not a HT748R? 748R ATEC was in most of the MC9s configured as you describe....bi-folds, non-restroom, maybe a butt ugly front cap? I have a similar MC9 that is an ex-NJT transit bus and have been very pleased. It's a lot of bang for the buck...but, they require some TLC. NJT generally maintained their coaches well...however, that MC9 may have been put out to pasture some years ago. As with all low priced shells, look it over carefully. It has rust... only question is where and how much.
Good Luck, JR |
Gary Belonga (Mb53)
Registered Member
Username: Mb53
Post Number: 15
Registered: 10-2006
Posted From: 71.115.128.110
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 25, 2006 - 10:33 pm: | |
Colonial bus sales list it as a 747 transmission and 6V96t ddecII. My main concern was that it would be able to run 60 to 65 without hurting the motor. We woundn't need to go any where in that big a hurry. |
larry currier (Larryc)
Registered Member
Username: Larryc
Post Number: 4
Registered: 2-2007
Posted From: 207.200.116.13
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, February 04, 2007 - 1:56 pm: | |
Gary, that motor is made to run wide open day and nite. You can't hurt it if you don't get it hot or run it out of oil. |