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Old 08-02-2018, 07:47 PM   #1
Mini-Skoolie
 
Join Date: Sep 2017
Location: Southern California
Posts: 19
Year: 1995
Coachwork: Genesis
Chassis: AmTram
Engine: DT466
Rated Cap: 45 passenger
MT 643 arived today

My MT 643 arrived today.
Now it's time to start collecting any other parts I need to do the swap.

Any advise on sourcing parts will be greatly appreciated.
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File Type: jpg Trans MT643.jpg (280.9 KB, 14 views)
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Old 08-02-2018, 08:34 PM   #2
Bus Nut
 
Join Date: Mar 2011
Location: Port angeles, Wa
Posts: 289
Year: 90
Coachwork: bluebird conventional
Chassis: international
Engine: dt466
Rated Cap: 72
Please give more info on the bus, engine, what parts you need. We can't help unless you fill us in.
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Old 08-02-2018, 08:46 PM   #3
Mini-Skoolie
 
Join Date: Sep 2017
Location: Southern California
Posts: 19
Year: 1995
Coachwork: Genesis
Chassis: AmTram
Engine: DT466
Rated Cap: 45 passenger
Quote:
Originally Posted by bluebird90 View Post
Please give more info on the bus, engine, what parts you need. We can't help unless you fill us in.
No problem. It's the one in the user box to the left.
95 Genesis Amtram with the DT466.

From what I've been reading I may only need to source a flex plate and bolts.
Any tips on figuring out what flex plate???
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Old 08-02-2018, 11:12 PM   #4
Bus Nut
 
Join Date: Mar 2011
Location: Port angeles, Wa
Posts: 289
Year: 90
Coachwork: bluebird conventional
Chassis: international
Engine: dt466
Rated Cap: 72
Are you going from manual to auto or at545 to mt643. Because there are different things you will need.
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Old 08-03-2018, 05:37 PM   #5
Mini-Skoolie
 
Join Date: Sep 2017
Location: Southern California
Posts: 19
Year: 1995
Coachwork: Genesis
Chassis: AmTram
Engine: DT466
Rated Cap: 45 passenger
Quote:
Originally Posted by bluebird90 View Post
Are you going from manual to auto or at545 to mt643. Because there are different things you will need.
I suppose that would help.
at545 to mt643
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Old 08-03-2018, 06:59 PM   #6
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Join Date: May 2016
Location: Minnehaha Co., SD
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Year: 1996
Coachwork: Amtran
Chassis: International
Engine: DT466
Rated Cap: 65
check out this thread http://www.skoolie.net/forums/f37/cr...out-20640.html

it may be of some help. page 3 is where the 643 swap comes into play
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Old 08-03-2018, 08:15 PM   #7
Bus Nut
 
Join Date: Mar 2011
Location: Port angeles, Wa
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Year: 90
Coachwork: bluebird conventional
Chassis: international
Engine: dt466
Rated Cap: 72
O K, here goes.
The trans must be matched to the application. The guts are the same but the valve body and governor is not. Install the trans with the wrong valve body and you will get early or late upshifts, over revving or bogging. If this trans came from a bus with the same engine and size bus with the same axle ratio, you are golden. otherwise send the valve body to allison for reconfiguring.

Flywheel, same.
flexplate maybe same.
shift linkages, same
modulator, same
drive shaft, different, uses different U joints and length.
Oil cooler lines on the 643 are bigger. using the 545 lines may cause running hot and restricted flow to the converter. Some 643s used the smaller lines tho. check for fit.
The cooler in the radiator may be smaller too on the 545.
You will not be using the adapter ring on the flywheel housing, unless yours is a #3. then you need the whole housing, flywheel , etc..
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Old 08-03-2018, 08:19 PM   #8
Bus Nut
 
Join Date: Mar 2011
Location: Port angeles, Wa
Posts: 289
Year: 90
Coachwork: bluebird conventional
Chassis: international
Engine: dt466
Rated Cap: 72
The same place you got the trans should have everything else. otherwise any medium truck wreckers should have them.
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Old 08-03-2018, 08:37 PM   #9
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 11,881
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
these LKQ transmissions are designed for DT's they are 2600 RPM 643's with the proper converter, they were ReMan for Navistar who dropped them off of their official parts list..



you'll need a flexplate for a mechanical DT, if your 545 was a deep pan then your dipstick and trans tempo sensor are same, modulator same, shift cable same.. hydraulic brakes *MAY* require some mods to the park brake drum bracket.. you will need to shorten the front driveshaft. you'll need new flywheel to engine bolts as you'll yank the spacer out... you'll remove the 2->3 ring off the flywheel housing.



things are different if you have a 466E .. what I described is for a mechanical 466 / 360


-Christopher
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Old 08-03-2018, 09:47 PM   #10
Mini-Skoolie
 
Join Date: Sep 2017
Location: Southern California
Posts: 19
Year: 1995
Coachwork: Genesis
Chassis: AmTram
Engine: DT466
Rated Cap: 45 passenger
Yes, Christopher is correct. The trans is from LKQ and came off of a DT466 mechanical which is what it's going back onto.
Bluebird90, sounds like I just need to get the 545 off and do some comparing of parts. If I'm lucky like the guy in that thread Dru Bru posted it will bolt right up.
With just a quick look it's hard to tell what spacer is on the housing. Looks like about .5". It's dirty so not sure.
The pan is the same depth so I should be good to go there.
Lot's of drive line shops within 80 miles of me so that should work out ok as well.
I wonder, will I need to source a tail shaft for the MT643?
I should be able to make up the fluid lines myself also.
I really appreciate everyone's feedback and guidance to helpful threads. I hope to have it ready to go to Quartzite next year.
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