B500 vs other Allisons

[TomC]

Having a recent World Transmission-mainly one that allows down to 1,000rpm is a good choice for the Series 60. In a bus, that engine is lightly stressed and running at a slower speed is fuel savings.
Course, how long will it take you to make up the about $11,000 difference in fuel cost between the World Transmission (4000 series) and a HT740? This is the main reason I went with the HT740 on my truck conversion even though I took out a 13spd single overdrive (.86). With 3.55 gears and 11R-24.5 rubber, my 65mph cruise will be 1830rpm-right at the continuous rating for the Cat 3406B-and for that matter, all other truck engines too. Good Luck, TomC

[TomC]

One other-the 4000HS can be had with either the PTO or without PTO. The 4000RTS (Rugged Truck Service) naturally has PTO.

[6805eagleguy]

Tom I know you really like your HT740,  It is a good transmission, but like I said there is an old blue bird near me on auction next tuesday,  I would really like to buy that one, then I would have a paired engine and tranny.
2000 model, has 447000 miles.  If that one goes to high for me then I will go back to looking at trucks and try to mate a transmission to a 60 series. 

Yeah it would take a long time to make up the fuel costs with a B500,  but eagles will run 75 well, I don't mind running 75mph especially on I70 in kansas, it is straight and flat there.  An HT740 wouldn't let me do that.  I am keeping that option in my mind, but as plan B or C.

[Tom Y]

Like others have said try to get the combo. My problem was I have one of the first Cumminins electronic engines "93" and a 200? Allison. They run on a different, not sure of the word-system.   

[blue_goose]

If you have a 3.36 rear in your coach I don't think you will get it past third gear.  I have a 4.10 in my coach and have to be 63 or more to get it in 6ht gear.  That is the reason I used the 740 when I changed the engine in my Eagle. 
Jack

[TomC]

If you want to run at 75, then the engine should be turning at least 1,400 in sixth. With .64 overdrive and 12R-22.5 rubber at 485rpm, that works out to be a 3.61 rear ratio. Good Luck, TomC

[6805eagleguy]

I thought I would let you guys know what happened on this.
Turned out I bought a bluebird LTC-40 (anyone know what that is?) with the 12.7 s60 and the allison B500 about 90 miles from home.  Bought it from a school so it has had fair maintenance, only problem was they left the master disconnect on so was completely dead when we got there.  On the way home we had no problem reaching 70mph so it I don't think I will be disappointed! 

I already have the fun part done, pulling the engine and harness, now I have to figure out how to stuff it in the eagle!

[daddysgirl]

Anyone know the typical life expectancy of the ht740?

They will outlast many a bus...and they pair perfectly with a 8v71. But I don't know the options with Eagle.

[Jim Blackwood]

Looks like you got the tall valve cover. Jakes? Some B500's have the retarder, unlikely it'll have both though. Sounds like  a great find. Should be pretty easy the check the play on the bull gear while you're getting it ready to install.

Jim

[chessie4905]

Wait! Why not just convert the Bluebird? Aren't they almost equivalent to a coach?😋

[daddysgirl]

Yeah it would take a long time to make up the fuel costs with a B500,  but eagles will run 75 well, I don't mind running 75mph especially on I70 in kansas, it is straight and flat there. An HT740 wouldn't let me do that.  I am keeping that option in my mind, but as plan B or C.

I have the HT740. I have buried my speedo more than I should admit, and it runs to 85mph...smooth as silk.

[6805eagleguy]

Looks like you got the tall valve cover. Jakes? Some B500's have the retarder, unlikely it'll have both though. Sounds like  a great find. Should be pretty easy the check the play on the bull gear while you're getting it ready to install.

Jim

Yep Jim, I have the tall valve cover with Jake's on all 6 cylinder's.  With the Jake's on high they provide a very impressive reduction in forward progress, i won't miss the retarder, especially since I have never used one before...

[6805eagleguy]

Wait! Why not just convert the Bluebird? Aren't they almost equivalent to a coach?😋

Maybe they're close to a GM or MCI but nowhere close to an eagle.
I couldn't believe how much the c channel frame flexed as we were driving around town, no IFS and tiny little air bags made me glad for my eagle.

[6805eagleguy]

I have the HT740. I have buried my speedo more than I should admit, and it runs to 85mph...smooth as silk.

Wow! All you HT740 fans sure are persistent!
What if I just wanted a world transmission

But too your 8v71 will run far over 2100 rpm which is what the S60 is governed at.

Ah well, I guess I'll never win... 

[daddysgirl]

500k the B500 is about to the end of it's life I have saw 1 that lasted 700k before though.If you can find a Allison PO2454EN application manual to down load it will clear up all your concerns about the different models of the World Transmissions I think the other for the 1 and 11 World is the PO2478EN manual,I know you can download from Allison but the fee is expensive,I have the hard copy   

Is this what you're referencing?