New type of Allison in deuce

[shannondeese]

Okay here goes. I have two prototype Allison trannies that are the Cummins circle bolt pattern. These things will hold up to 33,000 lbs in tow and up to 800 lb ft of tq. What I want to know is. Is there a way to hook this tranny up to the stock LDT465. Thanks.

 

[kc5mzd]

I think the LDT is a sae type 3 bellhousing or something like that. If the transmition is the same It might be worth a shot. I was thinking of doing a swap to get the faster overdrive of the new 6 speed auto. I did the math and decided it wouldn't be worth the cost and effort. It would still be close to over reving at 55.

 

[tm america]

pics go a long way here cummins in the dodge is a different bolt pattern than it is in a medium duty truck which cummins pattern is it the one on the medium duty is the same as the deuce the other is not .you could make anything fit anything but what trans is it ?will it be worth it is it to big to fit in lenght wise of does it have a pto?is it overdrive or not whats the raios and calibration all things you need to know to figure out if it is worth it

 

[shannondeese]

It is a heavy duty trans with a dual bolt patern. It is a 6 speed with over drive. A PTO on both sides with seperate controlers for each side so they can be run indepenently of each other. Allison is coming up to calibrate it and it's brother once I get them installed in thier respective vehicles. I have yet to measure the length of the stock tranny so I am not sure if I would have to move the T-Case or not yet. Does anyone make a flex plate for the LDT or will I have to machine one? And if it's too much of a pain I will just install a new Cummins but I hate to take out a perfectly good motor.

 

[tm america]

the ldt might run good but its no cummins.im sure someone makes a flywheel for it but you need to know what you are looking for .the ldt uses a sae 3 but it uses a sae 2 adapter to go to the 3053 -3052 trans used it the deuce .pics pics pics pics i wouild like to see what you are working with as far as the trans

 

[kc5mzd]

I was looking at the new Allison 6 spd double overdrive trans. If I remember the final overdrive is .61 I think it would give about 2000 rpm at around 55 with 11r20 tires. It would be nice but when I was looking at them they were around $6,000.00 - $8,000.00.
If you just happened to have one laying around...
Just dont forget they are computer controlled. I think the trans computer is suposed to plug into the engine computer so the trans can adjust the engine during shifts. With the power you get from the LDT it should be fine without the link but you will have to get somekind of throttle position sensor to try to make it shift.

 

[gimpyrobb]

Shame you aren't closer, I have lots of motors and trans sitting here. I think a 466 would be a good powerplant to use.

 

[shannondeese]

Here are a couple of pictures.

 

[tm america]

hey you can store that 466 in truck if you want gimp

 

[tm america]

looks like a 2000 series pretty much same trans as the 1000 but heavier duty and still computer controlled and a pita to wire in to the vehicle i think they are considerably lnger than the stock deuce trans to so you will have to move the transfer case back to fit it in there

 

[tm america]

the bell housing and mounts should work but thats about it i would stay away from computer controlled units like the in offroad vehicles .water and electronics dont get along very good

 

[gimpyrobb]

My post DOES make it sound like I have a 466 available. I was posting that I have stock deuce stuff to use as a refference if he were closer. That is what he was asking for right? If his trans would bolt to a deuce motor?

 

[tm america]

i know just wishful thinkingsorry it's getting to close to christmas

 

[mudguppy]

it's an SAE bolt pattern. you'll have to measure the bolt circle to determine if it's a 2 or 3. standard SAE flexplates should fit or be made to fit w/ some standard machining.

that trans is massive compared to the spicer - the transfer will have to be moved back probably almost a foot. that's going to make one hel of a long front drive shaft, too.

it can work, but you're going to have to do a bit of dialing in to get the trans shift points set correctly.

also, the right side PTO will be worthless since the drive shaft will be in the way.

and, it'd be close, but you might be able to fit the cummins in there w/ the allison and avoid having to move the transfer. but then you'll need to put an intercooler outboard in the grill area. the cummins would be easier to tune the transmission for because these are known parameters and expected performance curves.

nice trans, though. take some measurements - i'd like to know how long they are from flange face to output yoke CL.

 

[Unforgiven]

DESTROKED: Cummins Conversions

They have the flex plates & SAE to Cummins adapters. Right now they only have 1000 series transmission stuff. But I'm sure if you email them they would tell you exactly what you would need for a 2000 or 3000 series Allison to bolt to a Cummins. Stand alone ECU would probably be required. What series is that tranny you posted? It looks like a 3060.

 

[shannondeese]

The tranny is a modified RDS 2500 6 speed. Allison is going to program the computers and install them once the vehicles are built. So I don't have to worry about the electronic part of it. Thanks for the web site info. I'll post a bunch of pics as I install this thing. I might use a Stak T-case behind it. We'll see.

 

[Unforgiven]

I did the math and decided it wouldn't be worth the cost and effort. It would still be close to over reving at 55.

Stock overdrive is 0.79
0.79 x 6.72differential = 5.308

Allison, for example 3560, overdrive is 0.65
0.65 x 6.72 = 4.368

2600 RPM's/5.308 = 489.8 axle turns per minute = 56mph stock tires

2600 RPM's/4.368 = 595.2 axle turns per minute = 68mph stock tires

Add taller tires & you are comfortably cruising the engine well within safety rpm's at 60mph.

Even the A2's with 0.75 OD would see an increase in top redline speed to about 65 mph using stock tires.

But if you are going to do a tranny swap, why keep the multifuel engine? A Cummins 5.9 would give you more hp, more torque, higher revs & readily available parts. And at 500 lbs lighter it easily counters the extra weight of the Allison. My philosophy is either keep it stock, or modify it up to the limit of your budget. Tranny swaps are expensive. May as well do an engine swap while you're at it since both will require bell housing, ecu's, driveline mods etc. You can mate the new tranny up to a new engine outside the truck, then put it all in at once. It would make mating it up a heck of a lot easier.

 

[mudguppy]

if it's an SAE pattern tranny, you won't need to pay Destroked for the adapter - Cummins SAE engine adapters are available.

but when you say 'RDS 2500', you mean out of a Cheby? then, yes, you will need an adapter from Destroked as Unforgiven has posted.

and a Stak 'case in lieu of the deuce 'case?

 

[mudguppy]

... But if you are going to do a tranny swap, why keep the multifuel engine? A Cummins 5.9 would give you more hp, more torque, higher revs & readily available parts. And at 500 lbs lighter it easily counters the extra weight of the Allison. My philosophy is either keep it stock, or modify it up to the limit of your budget. Tranny swaps are expensive. May as well do an engine swap while you're at it since both will require bell housing, ecu's, driveline mods etc. You can mate the new tranny up to a new engine outside the truck, then put it all in at once. It would make mating it up a heck of a lot easier.

seconded.

 

[m-35tom]

Even the A2's with 0.75 OD would see an increase in top redline speed to about 65 mph using stock tires.

what is an A2? you mean a m35A2? where are you gonna get a .75 od

tom