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Old 10-31-2016, 04:19 PM   #21
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wiothout a tach its tough to see whats going on... MPH doesnt matter as much as engine / driveshaft speed when it comes to when the 545 shifts..

if you are not able to do 55 and you are running redline and you know you are getting all 3 shifts out of the 545 then it comes down to gears normally..

if you can find out your rear gears and tire height then we can calculate what you speed should be at a particular RPM..

both of my 545's shiuft when my engine hits its maxx RPM and begins to unload lsightly.. meaning im not going to rev any higher and im not just running against the stall of the torque comverter..

that translates to 4th gear engagement (foot to the floor) in my older bus (DT-360) at about 45 MPH... and in my newer bus at about 42 MPH... (its electronically handled)...

-Christopher
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Old 10-31-2016, 05:26 PM   #22
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Fuel pincher/545/and 6.50 eaton rear gears? Thanks
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Old 10-31-2016, 05:55 PM   #23
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50 MPH sounds about right for max speed..im assuming say a 41" tall tire.. (standard 11R22.5 drive tires)..

6.50 rear at 50 MPH comes back to a about 2700 RPM... i think the max on an 8.2 is 2700 or 2800...

your tires may be a little smaller or bigger rolling circumference.. I just used a number of what ive seen some tires...

-Christopher
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Old 10-31-2016, 07:03 PM   #24
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That's exactly what mine does. And it is a Wayne County bus out of Goldsboro NC. The 500 mile drive home at 45 MPh was interesting, but I drive the heck of that bus. I've got a source for a 3.53 ratio axle that I'm probably going to swap in.
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Old 10-31-2016, 08:37 PM   #25
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Originally Posted by Transporter2112 View Post
That's exactly what mine does. And it is a Wayne County bus out of Goldsboro NC. The 500 mile drive home at 45 MPh was interesting, but I drive the heck of that bus. I've got a source for a 3.53 ratio axle that I'm probably going to swap in.
I think you'll find that anything "faster" than about a 4.11 gear set may be too high of a ratio (lower numerically) for an efficient setup. The engine/trans is likely to struggle to accelerate and maintain optimal RPM's at cruising speed (unless you plan to run 75+, in which case you may need a bigger motor for anything other than flat ground).

Mine currently has a 5.38 gear and will run somewhere around 50-55 on the highway; if I regear it, I'll likely go with a 4.11.
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Old 10-31-2016, 09:59 PM   #26
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You're right, but I do want to be able to cruise the interstate at 80 MPH. I expect I'll have to repower the bus and ultimately plan to go with a Detroit 2 cycle. The 6V53 would
Be the easiest swap but I don't think the little 318 can do what I want, so I may end up having to jump to the 6v92.
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Old 11-01-2016, 08:15 AM   #27
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You're right, but I do want to be able to cruise the interstate at 80 MPH.

!!!!????

If your bus is a Chevy short bus on a van chassis, then that shouldn't be too unreasonable. If you're driving a 1990 Chevy full size bus then you'll want to be certain your brakes, kingpins, suspension, tie-rods, wheels, bearings, etc are all in tip top shape. That's dang fast cruising speed for an old school bus...
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Old 11-01-2016, 08:44 AM   #28
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at 80 you are going to have to hope your suspension and steering are DEAD ON or you will have that bus swaying easily....

my newest shortie has 3.56 Gears in it and 32" tires and will go 70 at 2600 RPM.. so I would concur that anything taller than a 4.11 is going to make that thing Lug severely on 40" plus tires...

-Christopher
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Old 11-06-2016, 03:21 PM   #29
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Alright gentlemen, I am still to computer illiterate to start a new thread so I would like some advice/opinions on this? Lack of money has always plagued my build and now I want to rotate tires?
Both of my steer say regroovable and 3 out of my 4- drive say the same and look good and one says remold with the states school system's name on it.
Obviously from my front steer tires both wearing on the inside.
Sorry a little more explanation? I just started driving it more and more since January and starting to see what/where it's at? We passed a full DOT inspection in April with no complaints or you need to look at this and that was me dropping the bus off and them calling when they got to it.
Now even though I can do 49 I get a front end wobble at 35-40 and have been through/hands on tie rods /ball joints and even the power steering pump and no slack found with each pice disconnected from anything it serves.
Long story short i have one tire that says remold and five that says regroovable.
The two on the steer(re-groovable) could be moved to the same side as they are as steers and the inside rears (same date stamp and regroovable stamp) could be moved to the steers?
Can't buy new tread right now but can make a rotate happen with a front end alignment with a four foot level?
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Old 11-07-2016, 10:25 AM   #30
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Are you running budd type or dayton's for wheels? Front tire wear sounds like toe out is too much. Have an alignment(or do it yourself) done. Have a tire shop check out your tires, I can't and won't comment on what you should do with those.
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