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Old 07-05-2017, 10:48 AM   #161
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Chris,

Did suncoast give you any input torque specs for this? What about a number for the acceptable full load engine governed speed? What about a GVW?

I couldn't find any info on suncoast's website about any of those. They listed a 1900 whp number but I'm not sure how relevant that is to the real world.

I know that you're likely not going to exceed any of the specs with your shortie. I'd just like to know how much of an upgrade it is over stock and whether or not it could be used in a full sized bus application.
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Old 07-05-2017, 10:59 AM   #162
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let me find out.. thats a great question on torque specs of my actual build.


the allison 1000 in stock form wasd used in the chevy 7500's and 8500's , I cant remember what their GVWR was on those..

the allison 2000 which is very similar in stock form to a 1000 is used in full sized busses.. at least full fize conventionals.. (12 row).

I'll get the answers on HP / TQ specs of my transmission.
-Christopher
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Old 07-05-2017, 12:25 PM   #163
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So how many boxes of electronics am I going to need to put one of these in my short bus, or should I just get a manual transmission ?
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Old 07-05-2017, 12:36 PM   #164
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Originally Posted by Kubla View Post
So how many boxes of electronics am I going to need to put one of these in my short bus, or should I just get a manual transmission ?
Yes, same question here!
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Old 07-05-2017, 12:48 PM   #165
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Originally Posted by Kubla View Post
So how many boxes of electronics am I going to need to put one of these in my short bus, or should I just get a manual transmission ?
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Originally Posted by EastCoastCB View Post
Yes, same question here!
If that's all it takes I've got enough for all 3 of us. I don't think he's quite McGvyer enough to build trannies out of old hard drives, modems, and sound cards tho.
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Old 07-05-2017, 02:55 PM   #166
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thesde are like any custom build, alot of work.

pick your poison.. electronic or mechanical

going manual, you'll have to find or fabricate the parts for the correct flywheel, flywheel housing, clutch and clutch disc, clutch slave and master, pedal assembly and install.. parking brake and parking brake bracket (unless you have air brakes). and of course an overdrive manual transmission with the correct Bell. the onlyt electricals involved are 2 simple switches.. one for reverse lights and one for clutch safety..

going allison 1000 the mechanicals are straightforward.. you get your transmission built with an SAE3 bell. it bolts right up in place of the 545 on the same flywheel housing. you either need to find or fabricate a park brake bracket (unless you have air brakes), and a shifter cable bracket.. (junkyard find from a GMC duamaxx or make it)..

both cases you need to alter the driveshaft length.

electronics - you need a programmed TCM module and wiring harness.. connecting the harness to the TCM and to the transmission is just plug it in. at the other end you will need bat+, gropund, ignition+ Vehicle speed sensor (this is the hard one if you had a 545), and a Throttle position (this is easy on electronic engne you just tap into a wire at the go pedal).. on mechanical engine, a TPS with a cable is made that connects in place of your AT545 modulator cable. easy install.

for the VSS (vehicle speed sense)in my case, I built a circuit using a dakota digital SGI5-E box and a few resistors.. it seems to work well.. no codes all day today.. I used 4 variable resistors and some wire.. and im more than happy to share the sechematic with anyone doing the swap. if you can solder you can build it.. no chips or software or such in my little "device"...

I went a couple steps further and connected the "tap shift" up.. if you have a late model car you go from 'D' to 'M' and you can control the maximum gear that your vehicle shifts to... so ie in the mountains, I tap shift from 6 to 4 and it will pull hills and not over-speed on downhills..

and its NOT CHEAP.. I didnt build this on the frugality budget.. however it very possibly could be (except for the TCM) if you can find the right parts in the boneyard.

I built it as a challenge to myself and because I enjoy doing this kind of thing... and to improve the driveability of my bus as well as fix the broken transmission issue.

-Christopher
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Old 07-05-2017, 04:39 PM   #167
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For me, it would be a junkyard transmission, te444s in s series international's came with manual transmissions more than automatics, all the parts are available and bolt right up.
Like I said before, I do not understand pretty much all of what you are doing to get the speed sensor to work, I can hook wires together and hope it works
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Old 07-05-2017, 06:17 PM   #168
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Originally Posted by Kubla View Post
For me, it would be a junkyard transmission, te444s in s series international's came with manual transmissions more than automatics, all the parts are available and bolt right up.
Like I said before, I do not understand pretty much all of what you are doing to get the speed sensor to work, I can hook wires together and hope it works
for a junkyard build go manual, no need to buy transmission compouters and such.. and the speed sensor from a manual will probably just work on yours without any electronics.. most we would have to do is reprogram the number of pulses per rev of the driveshaft in your ECM...
-Christopher
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Old 07-05-2017, 06:40 PM   #169
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I'm now convinced my shorty needs a 643. Would be perfect for what we do.
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Old 07-05-2017, 09:09 PM   #170
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I'm now convinced my shorty needs a 643. Would be perfect for what we do.
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
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