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Old 07-05-2017, 10:19 PM   #171
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Join Date: Sep 2014
Location: Eustis FLORIDA
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Year: 2004
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Chassis: CE300
Engine: DT466E
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Quote:
Originally Posted by cadillackid View Post
I agree a 643 or if any more of those 1545's come up in auction cheap.

you arent running that bus all across the country.. im guessing RYO is going to be your world traveller, so if one of them needed a horsepower upgrade or a trans upgrade to overdrive id do that one..

one thing I notice is having lockup its almost like I upgraded the power.. I drove the bus in M4 for a bit tonight (same ratio as a 643 locked up), and it is pretty powerful.. I can imagine it will run my trips to florida through the mountains at full speed now... even in 4th gear it still ran cooler than with the 545..

so i think for shorty we first adjust down your fan clutch and then you look for a 1545 like turf found..
-Christopher
10-4

Yeah, lock-up is awesome.
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Old 07-05-2017, 11:26 PM   #172
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working on getting my MT643 back, it was in the back of my other bus when I sold it, one problem is that I think the 643 has a number 2 SAE bell housing so you need and adapter to go on a TE 444, also is 6 inches longer
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Old 07-06-2017, 07:37 AM   #173
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I didnt realize the 643 is 6 inches longer. do you have a drum brake on your transmission or is your bus air brakes?

engine connection wise.. my 444E flywheel housing came out to an SAE2 mount and then an adapter ring was installed to make it SAE3 for the AT545.. I didnt look close enough to see where the extra spacer is.. if its behind the flywheel then you would just remove it.. if not then you would have to find a set of spacers for the converter nose and converter bolts-to-flywheel that are correect for SAE2. only way really is to tear it apart and see whats there.. you can easily crawl under and see if your engine housing is an SAE2.. if you look at how the 545 is bolted to the engine.. and the bell bolts have another set of bolts in a ring just outside of the actual trans bolts then you have an SAE2 flywheel housing thats been adapted down to SAE3.

-Christopher
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Old 07-06-2017, 08:03 AM   #174
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Join Date: Oct 2016
Location: Essex, MD
Posts: 2,464
Year: 1999
Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, AT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
Quote:
Originally Posted by cadillackid View Post
and its NOT CHEAP.. I didnt build this on the frugality budget.. h

I built it as a challenge to myself and because I

-Christopher
... hate money.

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Originally Posted by EastCoastCB View Post
I'm now convinced my shorty needs a 3060. Would be perfect for what we do.
Fixed.

643 is only a 4 speed. And maybe in a shortie but there isn't a chance in hell Chris is going to run up the east coast hills that are called mountains in 4th. My bus weighs 20,600 without seats and plywood.
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Old 07-06-2017, 08:31 AM   #175
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Originally Posted by Brewerbob View Post
... hate money.

Fixed.

643 is only a 4 speed. And maybe in a shortie but there isn't a chance in hell Chris is going to run up the east coast hills that are called mountains in 4th. My bus weighs 20,600 without seats and plywood.

Red is a shortie with a GVWR of 17500 so empty its probably what 14000? I have a chance of running the hills in 4th. now 5th? yeah not a chance.. I do have a case open with navistar to try and get a Horsepower upgrade to 210.. I learned the engine itself is the same.. however they may deny me because the bus is a custom project.

but with my gearing I can close to 50-55 in 3rd.. I need to do that yet.. redline in each gear to see what the top speed is.

-Christopher
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Old 07-06-2017, 08:49 AM   #176
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Rated Cap: 84 pax or 1 RV; 33,000lbs
Quote:
Originally Posted by cadillackid View Post
I do have a case open with navistar to try and get a Horsepower upgrade to 210.. I learned the engine itself is the same.. however they may deny me because the bus is a custom project.
What do they care? Here, sign this... all warranties are null and void. Here's your 6,000 hp. See you tomorrow for a new one.

Quote:
but with my gearing I can close to 50-55 in 3rd.. I need to do that yet.. redline in each gear to see what the top speed is.

-Christopher
Won't happen with a 643. I haven't tried to beat on mine but 4th to 3rd is 38mph on the downshift (uphill). Not sure where it does the upshift but it's long before 50. 65 is 2500 rpm so I try to stay below that.
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Old 07-06-2017, 08:56 AM   #177
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I said the same thing on the phone.. but the dealer guy I talked to (who is real cool) said that its always a liability thing.. he sent me directly to navistar to avoid a shop fee by them calling and opening a case file.

my upshifts are at 2600-2700 which is close to the redline of the engine.. the 545 shifted at those RPMs but because it was unlocked it just was slipping the torque converter..

downshift to 3rd at 38 is about right.. you likely upshift at 45 or close to that.. you are geared a little shorter overall than i am..

with a 6 speed transmission if I geared to 4.10's id probably have a powerhouse of a bus.. but im just happy with the way it takes off now... so i wont be too distraught if navistar doesnt approve the HP update.

-Christopher
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Old 07-06-2017, 09:15 AM   #178
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Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, AT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
Quote:
Originally Posted by cadillackid View Post
my upshifts are at 2600-2700 which is close to the redline of the engine..
I only see those RPMs if I'm not paying attention downhill or I have it floored trying to pass someone.


Quote:
downshift to 3rd at 38 is about right.. you likely upshift at 45 or close to that..
Not a chance in hell. More like 35. I'm due for a fill up soon. I'll have to remember to watch.

Quote:
you are geared a little shorter overall than i am..

-Christopher
4.44 is my rear and the tranny is a straight 1:1
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Old 07-06-2017, 10:05 AM   #179
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the 2600-2700 upshifts on mine are at floored.. I see much lower shift points when im off the go-pedal.

what is your tire size? when I talk of full gear ratio im talking of trans / rear / and the tire size.. im guessing you have 11R22.5 tires?

-Christopher
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Old 07-06-2017, 10:16 AM   #180
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Join Date: Oct 2016
Location: Essex, MD
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Chassis: Blue Bird TC RE 3904, Flat Nose, 40', 277" wh base
Engine: 8.3L Cummins ISC 260hp, AT643, 4.44 rear
Rated Cap: 84 pax or 1 RV; 33,000lbs
Quote:
Originally Posted by cadillackid View Post
the 2600-2700 upshifts on mine are at floored.. I see much lower shift points when im off the go-pedal.
That's just for your learning tho right?

Quote:
when I talk of full gear ratio im talking of trans / rear / and the tire size..

im guessing you have 11R22.5 tires?
Yeah, I know that's part of it.

Yes.
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