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Old 06-26-2018, 08:34 AM   #1
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Join Date: Oct 2016
Location: Essex, MD
Posts: 3,542
Year: 1999
Coachwork: Blue Bird
Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, MT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
'99 B.B., 8.3L Cummins w/ MT643 Tranny heat exchanger

Does anyone know what the part numbers are for the water inlet tubes and tranny heat exchanger? I believe my heat exchanger is shot. The metal water inlet and outlet are rusty as hell too so might as well replace those while under there.


About the transmission fluid, it's red like ATF but it doesn't stink. Is bus tranny fluid different? Sounds like the same old stuff that Auto Zone and the like carry.


Quote:
Originally Posted by FSM

Approved Hydraulic Fluids
! Automatic Transmission Fluid Dextron
II
! Automatic Transmission Fluid Type "E"
or "F"
! Chevron 10W-40 Motor Oil
! Chevron Custom 10W-40 Motor Oil
! Chevron Torque 5 Fluid
! Exxon Nuto H32 Hydraulic Fluid
! Fleetrite PSF (Can #990625C2)
! Ford Spec M2C138CJ
! Mack EO-K2 Engine Oil
! Mobil ATf 210
! Mobil Super 10W-40 Motor Oil
! Premium Blue 2000 – SAE 15W-40
! Texaco 10W-40 Motor Oil
! Texaco TL-1833 Power Steering Fluid
! Union 10W-40 Motor Oil
! Union 15W-40 Motor Oil
! Unocal Guardol 15W-40 Motor Oil
Attached Images
File Type: jpg Tranny heat exchanger.jpg (338.6 KB, 3 views)
File Type: jpg Tranny fluid.jpg (131.7 KB, 4 views)
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Old 06-26-2018, 08:54 AM   #2
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Join Date: May 2009
Location: Columbus Ohio
Posts: 11,656
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
most all of the allisons "standard" fluid is good ole DEXRON III like the old GM's used..



TES-295 fluids like Transynd are probably the best (but also expensive).. and as listed on the above list, certain motor oils (C4 designated) are acceptable.. the motor oils tended to stand up to heat better than regule ole ATF.. and the synthetics didnt exist when a lot of these Spec's were written.. 643s have been around a long time..

-Christopher
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Old 06-26-2018, 09:08 AM   #3
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Join Date: Oct 2016
Location: Essex, MD
Posts: 3,542
Year: 1999
Coachwork: Blue Bird
Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, MT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
The hydraulic reservoir has a 15-40 oil weight sticker on it. I'm not certain on the exact weight; I have a picture of it somewhere. But the question is is that oil or tranny fluid? This is red like good old Dextron. Does this mean I'm running oil for the engine and tranny fluid? Oil isn't red. Seems odd that they would use two different fluids if regular old oil is approved for both.


Tranny fluid is nastier to get rid of (EPA), costs more (I think), and you'd have to have two different storage containers.
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Old 06-26-2018, 11:55 AM   #4
Bus Geek
 
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Join Date: Oct 2016
Location: Essex, MD
Posts: 3,542
Year: 1999
Coachwork: Blue Bird
Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, MT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
Part # 00103804
List: $875.60
Wholesale: $616.90


Yeah,... that's not happening. So, who knows someone that knows someone?
Attached Images
File Type: png 103804.PNG (52.3 KB, 6 views)
Attached Files
File Type: pdf PARTS QUOTE.pdf (467.2 KB, 5 views)
File Type: pdf Heat Exchanger.pdf (914.6 KB, 5 views)
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