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Old 05-14-2017, 10:29 PM   #2241
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Join Date: Jul 2016
Location: Prince George, BC, Canada
Posts: 525
Year: 1974
Coachwork: Bluebird
Chassis: CHEVROLET C60 just under 19700 lbs body#B10353
Engine: 350 ci on propane
Rated Cap: 48
I have read about auxiliary transmissions hung on the output shaft of an Alison transmission. Would this be a good overdrive option?

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Old 05-14-2017, 11:06 PM   #2242
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Join Date: Mar 2011
Location: Houston, Texas
Posts: 7,903
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
I believe there are some "Brownie Box" style units that might add OD but don't really know anything about them. The only ones I have actually seen were on older, manual trannies.
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Old 05-17-2017, 11:29 AM   #2243
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Join Date: Mar 2011
Location: Houston, Texas
Posts: 7,903
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
Got Brakes? --- well...not exactly...but I do have a growing pile of parts. The remote master kit arrived and I am trying to figure out the plumbing. Never having seen such a set up, I'll be going back to the builders website often I do believe.


Here is the master blaster with a piston operated actuator attached. All this goes under the bus...somewhere or other.


And this doodad is the mini-clutch master that sends fluid to the master blaster. It will mount on the firewall and the the pedal will work this.

However...like everything else on this build, it had to first be modified.


I had to cut about 3 inches off the pushrod that operates the clutch master...then thread it down another two inches...then fabricate the adjustable eyelet you see on the end of it all.

If I could recover the time spent digging through the fastener and miscellaneous parts areas at my local hardware store...this rig would be DONE by now.


ONWARD!
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Old 05-17-2017, 01:11 PM   #2244
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Join Date: Apr 2012
Location: So Cal
Posts: 2,164
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
Got Asprin?

I know I'd need it if I were trying to figgrr that out! It sure will help with the foot room under your dash to say nothing of the space under the hood. Jack
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Old 05-17-2017, 01:28 PM   #2245
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Location: Houston, Texas
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Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
Roger that Jack --- No choice. No room under the bonnet. I HAD to find another location for the master. And I'm still trying to figger out where to put a few other things like the start battery. Right now I'm working on a stacked up CAC & radiator system that I hope will squeeze into that narrow nose and still do the job.

Would have definitely been easier to just drop the body onto a late model running chassis like SOME people cleverly did.
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Old 05-17-2017, 10:04 PM   #2246
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Join Date: May 2009
Location: Columbus Ohio
Posts: 10,035
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
wow thats some brake setup.. so it goes back to the idea theres only one hydraulic circuit from the "clutch master" down to the brake master.. better make sure that you have a good heavy parking brake drum in case you had to use it to stop the bus!..

cool setup though!!!

thanks for reminding me of CAC (transmissions)... had been a few months since I talked to them.. spent a good 2 hours on the phone with them today and we have a tricked out setup for my red bus in the works... also a "small world moment..".. the "primary" guy's wife was a technical gal at the manufacturer of the hotel phone system I first cut my teeth on installing.. and most likely knows my business partner.. ha!

did you end up getting any of your transmission bits from CAC?

BTW I went 6 speed.. he has the ability to have a "push button" shifter now.. once you put your main handle in D he has push button style input so you can lock yourself down to 5 or 4, etc (automatic but you set the max gear electronicaly)... might make it nice for you depending on where you end up putting your main shifter.. you could have "paddles" on youre steering wheel for up and downshift if needed as you roam through mountains
-Christopher
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Old 05-18-2017, 01:06 AM   #2247
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Join Date: Mar 2011
Location: Houston, Texas
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Year: 1946
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Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
Hey Cadillac --- It has been a while but as I recall, I got some goodies from TCM. I went with an all mechanical (cable) shifter just to avoid any more electronics. I will leave all that fancy stuff to you guys who understand it.

Today I spent a lot of time holding my breath. It was time to drill some holes in the footwell I spent a month or more building in order to mount the new mini-master cylinder. Measure...check...re-measure, re-check...make a template...re-check...then...go for it. One shot to get it right or screw up a lot of work.

It looks like it will indeed work.


I cut a metal template for positioning the small master then locked it down as best I could before diving in with the drill. It seems to be properly positioned.

Whew!

Must be nice to work on a bus that already has most of its' gazillion little parts in place.


ONWARD!
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Old 05-18-2017, 06:16 AM   #2248
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Join Date: May 2009
Location: Columbus Ohio
Posts: 10,035
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
That system is cool regardless.. I'm still wondering where you place the brake master.. seems it still has to be above the highest point you route any brake lines. So if you should get a leakcthe air bubbles try to work their way toward the fluid reservoire
Plus a place where you're able to easily check the fluid.

I'll still have a hard shifter, that's the beauty of these allisons. They are fully electronic trans but even if you waste the computer you still have reverse and 2nd gear so you can move your bus.
The fancy stuff is just if you want an override or in my case the pure geek factor.
So for power you will have hydroboost still? Or does this setup use an electric motor?
Christopher
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Old 05-18-2017, 09:26 AM   #2249
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Join Date: Mar 2011
Location: Houston, Texas
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Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
Hey Chris --- The reservoir is also remote and will hang up high on the firewall. The actual working master will mount on a frame rail like some of the old, underbody systems. Once filled and bled, no need to open that one up. And it will all be tied into the Cummins hydraulic pump (along with the Isuzu steering box) as a full Hydroboost brake package.

And the Allisons are indeed a beautiful piece of work that have just gotten better over the years. Plenty of options in a really rugged package. Can't wait to see how you build yours out...then tweak it. I envy your tech skills. Mine are limited to things that can only be "tweaked" with a large hammer.
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Old 05-19-2017, 11:03 PM   #2250
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Join Date: Mar 2011
Location: Houston, Texas
Posts: 7,903
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
Gimme a Brake! --- Not quite there yet...but, at least I am a bit closer to having most of the parts for one. Got the mini-master mounted, hung the pedals and fabbed a bracket for the reservoir.


Ta-daa! The mini-master is bolted down to the outside of the footwell.


Home made bracket and the brake fluid reservoir.


And here it is on the firewall.


And the pedal is now in the right position and connected to the piston.

I just hope this stuff all works.


ONWARD!
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