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Old 01-08-2019, 12:30 PM   #21
Bus Geek
 
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Sometimes I am amazed at my own ignorance.......

My first bus was rear engine and had a "dropbox" between the transmission and differential to reverse the rotation.

I have also seen RE buses that the engine turned the opposite direction compared to "normal". (RH? LH?)

Now I have to ask..... Why does my Bluebird go forward when I put it in drive and not backwards?

I don't see a drop box and I have never heard any discussion of RH Vs LH rotating engines in school buses.

What am I missing????
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Old 01-08-2019, 12:41 PM   #22
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The ring gear and which side of the carrier the ring is on and how the pinion contacts it will determine which way the axle spins . It could be as simple as a different 3rd member for your axle. Id have to dig deeper but the concept is the same.
Christopher
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Old 01-08-2019, 12:46 PM   #23
Mini-Skoolie
 
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Quote:
Originally Posted by PNW_Steve View Post
Sometimes I am amazed at my own ignorance.......

My first bus was rear engine and had a "dropbox" between the transmission and differential to reverse the rotation.

I have also seen RE buses that the engine turned the opposite direction compared to "normal". (RH? LH?)

Now I have to ask..... Why does my Bluebird go forward when I put it in drive and not backwards?

I don't see a drop box and I have never heard any discussion of RH Vs LH rotating engines in school buses.

What am I missing????
I am not familiar with rear eng. set-ups either but unless I miss my guess, if you study the diff. gear carrier, you could find that the pinion gear is on the opposite side to your fr. eng. bus?
Respectfully:
One_Eyed_Jack
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Old 01-08-2019, 12:59 PM   #24
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Quote:
Originally Posted by cadillackid View Post
The ring gear and which side of the carrier the ring is on and how the pinion contacts it will determine which way the axle spins . It could be as simple as a different 3rd member for your axle. Id have to dig deeper but the concept is the same.
Christopher
So it is the differential that is different?

Are ring and pinion interchangeable with one's that come from FE buses or trucks?
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Old 01-08-2019, 01:06 PM   #25
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Originally Posted by PNW_Steve View Post
So it is the differential that is different?

Are ring and pinion interchangeable with one's that come from FE buses or trucks?

Basically yes the differential is different.

As far as I know it is rare to have a left hand engine in automotive/truck use. However in marine use if a boat has two engines then there will be a right and left hand so that the props turn opposite directions and torque steer is cancelled.
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Old 01-08-2019, 01:55 PM   #26
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Quote:
Originally Posted by Ronnie View Post
Basically yes the differential is different.

As far as I know it is rare to have a left hand engine in automotive/truck use. However in marine use if a boat has two engines then there will be a right and left hand so that the props turn opposite directions and torque steer is cancelled.
Thanks for the info.

Some of the old GM's had reverse turning DD 2 strokes. I agree, much more common in marine applications.
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Old 01-08-2019, 09:58 PM   #27
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I think it's a sweet idea. Is that a p pump motor or ve can't tell from pic. I would for sure try to do the 4wd. I am building a 49 diamond t bread truck with a power wagon m37 front clip. Using a 12 valve ve pump nv5600 trans np205 t case Dana 80 rear and Dana 60 front with 4:10 gears and lockers hopefully 40 inch tires if they fit nice . Building more of a adventure camper. I put a 12valve in a 56 Chevy bus a couple years back
for a buddy it drives nice I used a nv4500 trans and rear axle out of a 5500 ram it drove nice on highway had plenty of power pulling hills and I got 16 mpg on a 200 Mile road trip he still wants to convert to 4wd so waiting to swap the from axle out
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Old 01-09-2019, 05:53 PM   #28
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What you do depends on your budget.

I'd keep the engine regardless. You're not going to find a 6bt with a p-pump any easier then what you have now.

If you have the funds, upgrade the transmission. If not, run what you have until it's junk and then upgrade.

All the pusher chassis busses that I've seen would use the same axle housing as a conventional drive, but the differential assembly would be different. You can't just flip it because it's a hypoid gear and won't oil correctly if installed upside down. You can flip the brakes side to side, and then install the correct differential, but it might just be easier to locate an entire axle. Especially if you're looking for different gearing as well(and rear axle ratio is definitely something you should be thinking about)

On the topic of brakes, I assume the dodge is hydraulic while the blue bird is air? That's another tidbit you'll have to work around whether you go all hydraulic or all air. I prefer air brakes in a bus but to each their own.
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Old 01-16-2019, 07:22 PM   #29
Skoolie
 
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Well I had a great idea for you,... til I saw the donor was a rear engine bus.
Personally if me the I would proceed on this would be to use the 6BT engine & trans combo and then find another front engine bus for the frame and axles.
The rear engine buses have special rear axle gears. ( the ring gear are reverse rotation) They can only be used in rear engine vehicles.

Yes my idea is to mount all that classic sheet metal on more modern frame AND driveline .
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Old 01-16-2019, 10:40 PM   #30
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your working on the wrong bus.
Don't screw up a nice BB pusher.
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