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Old 04-05-2013, 09:38 AM   #1
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Re: Engine and Transmission Questions - looking at two busse

INTERESTING ENGINE,just read the pdf about it

http://www.demanddetroit.com/pdf/voc...-schoolbus.pdf

I wouldn't want it because of all the electronics of it

I don't think many older used buses would have this engine, weird that it's coupled with a A545 tranny seems to new for that tranny

Are you sure on the tranny,those power numbers are alittle high for A545

Engine brake standard,thats neat

What year bus are you looking at?
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Old 04-06-2013, 11:53 AM   #2
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Re: Engine and Transmission Questions - looking at two busse

The DT usually has a 545. You cant go wrong with that engine. Wet sleeved so you need to keep after the coolant ph and nitrites, etc. I would check gear ratio and be sure it will get you down the hwy at a reasonable speed.
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Old 04-08-2013, 06:20 PM   #3
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Re: Engine and Transmission Questions - looking at two busse

Its an acceptable transmission. Most school buses have the 545. If you are not going to be in the mountains much, it will be just fine. It doesnt have a lock up converter so going up you will have to watch tranny temp. Going down you will be relying on your brakes and not the tranny.
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Old 04-09-2013, 08:29 AM   #4
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Re: Engine and Transmission Questions - looking at two busse

Like Opus said the tranny is fine on flat ground,up and down the mountains is not it's element

Where I live it's up and down mnts to go anywhere...on flat ground it "idles" at 60 in 4th gear
.
.
.
Normally I stay in 3rd gear at 2200/2500 and thats 45/50 (narrow back roads and lots of up and down) just have to watch tranny temp
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Old 04-12-2013, 07:06 PM   #5
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Re: Engine and Transmission Questions - looking at two busse

Just know that a FE bus is going to be LOUD! 230k miles isnt an issue. Check the engine hour meter, that is far more import than miles. I think we talked about this before but I think you would be much happier if you picked up something out west. You would eliminate the rust problem and chances are you would get a bus better suited for highway use. Rear axle ratio is going to be important for you too. I am thinking that something with a 545 will have a lower gear ratio, therefore limiting highway speeds. Not positive on that though.

Sorry to be negative but I would rather be negative about what you HAVEN'T bought, than about what you have bought and wish you hadn't.
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Old 04-13-2013, 01:30 PM   #6
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Re: Engine and Transmission Questions - looking at two busse

I have limited experience with modern electronic bus engines, but I have worked on several ambulances with electronic 5.9 and the Mercedes diesel, and they are all coupled to electronic transmissions with lock up torque converters.

How likely is a person to find an electronic engine coupled to a non electronic trans?
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Old 04-13-2013, 01:39 PM   #7
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Re: Engine and Transmission Questions - looking at two busse

As far as rust, with the exception of the bus I parked in the ocean, rust has not been much of an issue with the other michigan buses I've owned.

Some blue bird buses are galvanized which is an option of you are concerned with corrosion.

There is a link in skoolie that helps you identify an at545 vs an mt643. It would be a great idea to have the photos of each trans handy so you can identify the trans on any particular bus when crawling underneath.

Also, the rear end ratio is occasionally printed on the vehicle info tag near the driver seat, and almost certianly printed in a metal tag attached to the differential cover.

Lock up torque converter, inline engine, and 4.44 or 4.10 rear end ratio is super important for fuel economy.

If you were burning diesel fuel, the wrong powertrain that gets 2mpg less than the alternative would cost an extra $500 on one trip from Michigan to California and back.
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Old 04-13-2013, 05:16 PM   #8
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Re: Engine and Transmission Questions - looking at two busse

Lapeer the electronic vs non electric tranny also is what caught my eye it just seems weird
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Old 04-14-2013, 09:45 PM   #9
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Re: Engine and Transmission Questions - looking at two busse

We just got back from a 600+ mile weekend of concerts. About 40 miles from here there are 4 buses sitting. I think they are for sale, I will find out more this week about them. Looked like a couple of them were rear engine as well.
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Old 04-15-2013, 11:08 AM   #10
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Re: Engine and Transmission Questions - looking at two busse

I'll have a friend stop and get me a number and I'll call. I dont plan on going that way for a few weeks though.
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