Allison Trans NOT

[Plandon]

I'm probably in the wrong forum but if so sombody will tell the other guys. Maybe you guys already know this , me being new to this club makes it hard to know that . Anyway today talking to a Allison supervisor at work he told me that there was a deal between Allison & Dodge to use Allison trans in are trucks but damyler put the kybash on it. It was already for production and they trashed it. He said today there is no technolgy for the computer to talk to the trans. It'll fit but it can't talk to the comp. Darn it would have made a nice convertion for us 1st Gen guys. Oh well!

 

[AMikonis]

Yep, I heard a similar story from someone at D/C. He said the bean counters nixed it because they thought it was too expensive, and they've regretted it ever since. Especially when they realized how much us knuckleheads spend on our trucks in modifications. So, that's why they developed the 48RE trans for the 3G trucks...



I don't really know anything about Allison transmisions, but computer control is not applicable for a first generation retrofit. There must be a non-computer trans that'll bolt up to a Cummins, via adaptor plate or something, no? Heck, I know a guy with a John Deere combine engine in a '72 Dodge pickup with an Allison trans. Don't think he's got a computer...

 

[bmoeller]

I wonder if any of the Allisons used on Big A floaters would work? They have them behind 3208 Cats and VT555 Cummins engines in that app. One drawback might be that they are 4spds. w/o an overdrive.

 

[DPKetchum]

Saw school buses ast the freightliner dealer being serviced with 1998. 5 24 valve b59 and allisons

 

[R.E. Miller]

Yup, I have pulled a few engines that were mechanical, and they had little allisons on them. Unfortunately, I don't know the model, and I heard that the price in steep.



Russell

 

[Brayden]

There are many Allison Transmissions that will work with the cummins 5. 9 or 8. 3.



The smaller of the the mechanical transmissions being the AT transmission (production stopped 8/1/03) is a very good transmission for a cummins 5. 9 mildly bombed. It's a little bigger than a turbo 400 and it's much stronger. Since it's a hydraulic trans, it's very easy to adjust shift points etc. Main and Line pressure can be adjusted via stiffer springs etc. It's a 4 speed and comes in many different ratios. No overdrive though. Would be good with an overdrive box.



The next size up is the MT. Can't recall the exact horsepower rating. It can be found in many motorhomes and similiar duty platforms. Can be found in many configurations, close/wide ratio 5 and 6 speed. 5 & 6 being overdriven.



And the mother of all the mechanically controlled ON road Allison's, the HT. The HT if i recall can be had in 4/5/6 speed configurations. It is very big. This can be found in tri-axle dump trucks, semi's, Agricultural sprayers (Big A etc. ), cement mixers, etc. Very high GVW rating, and something like 2000 lb/ft input torque max rating.



All of these now have an electronically controlled equivalent.

The AT was replaced with the 1000/2000/2400 series transmissions. All the transmissions are available with various bellhousings, including SAE #2/3 and the 1K/2K/2400 series has a GM bellhousing for the duramax and 8100.



Now, what most people don't know. . The new electronic allison's will operate with older mechanical diesels. The allison gets it's throttle position sensor information from a TPS sensor attached to the pump lever arm.



Whereas the electronic diesels will transmit the TPS information over the Controller Area Network, CAN BUS SAE J1939 network, or a serial data connection, SAE J1850. There are also other standards, just can't recall them at the moment.



Hope that clears up some of the mysteries of the Allison's and how to adapt them.

 

[62MaxWedge]

Try a 543 or, 643 series, I think these are mechanically controlled however, no park pawl provision.





Somebody more knowledgeable can jump in.

 

[zstroken]

Be Patient

I hear rumors of several new trannies for the dodge fans

 

[Speedo]

Allisons

The AT 500 series trannys were all 4 speeds, no od and hydraulic

AT 540, AT 542, AT 545 etc. the turbine shaft is the same size as

a TH400 and the clutches are the same size in the fwd clutch

housing and they weren't available with a park pawl but you could

get a park brake bolted to the output.

The MT 600 series was either a 4 speed, MT 640, MT 643 or 5

speed MT653, MT 654 and still no od.

The HT series are too big to go into.

Now we're into the World Transmissios the 1000/2000/2400 are the same

size with some different applications. Next up the ladder

are the 3000 series these are used in motor homes and mid size

trucks. The top 2 gears are od and they are 6 speeds not all trans

have the full 6 speeds built into the programs. The 1000/2000/24

00 trannys weigh 330 lbs. and use a sae #3 mounting with a #2

optional. The 3000 series weigh in at over 500 lbs w/o the out-

put retarder and with the retarder they weigh in at over 600 lbs.

The 3000 series use a sae #2 mounting. The World Transmissions

use a stand alone computer so they can be used with a

mechanical engine. This is not a complete list and it may not be

totally accurate but I think that its pretty close.



Gus

 

[Brayden]

ECHO



The 1K/2K/2400 has a standalone controller, and can be used behind a mechanical engine also.

 

[blacksheepdiesel]

While we are on the Allison...

So, were do I find info on how to adjust the Allison 5xx in my '99 Freightliner bus? Lately when I start it up first thing in the morning I can rev the engine slightly but the bus won't move for several (10?) seconds. Could the torque converter be draining overnight, then has to refill? Do I need to make an adjustment?



Also, I would like to change the shift points just a little bit. I drive this thing for fuel mileage, not power, and am putting in 275rv's this week in an effort to get the fuel mileage past 9. 5 mpg. I am the only one that drives the bus and there I shouldn't be concerned about the extra horses from the injectors damaging the Allison, right?!? It is rated for a 190 hp engine which is what I currently have.



Thanks for input!!!



Trent

 

[Barry]

Last week I bought a 2000 Reflection Motorhome by Forest River. It has a Cummins 24V/260HP running thru an Allison 1000 5 speed. It is sooooo smooth you have to watch the tach to realize when the trannie shifts. I am impressed!