I am not sure what to do right now but I know I have to do something quike.

 

Best of luck.

 

Let us know what direction you go and how it works for you...good or bad!

Tony

 

I said this months ago and no one beleived me.

Allison swap is not worth it for what you get vs. $$$$$ it costs. Just go for a built to the hilt 48re and you will be more than satisfied.

The allison was designed to haul huge loads at stock power levels and last a million miles while doing so. It is not a race transmission by any means and its nature of operation (clutch to clutch) does not lend itself to flawless handling of huge power levels. Buck and Jess Spruill (the guys who have the extended cab 10 second duramax) kept blowing up allisons when they got into the mid 10's. It is not a matter of "add billet parts"...a clutch to clutch transmission is mechanically and electronically (TCM) limited to a fairly low power level compared to what an old-school transmission (TH400, powerglide, 48re) can be built to handle. For all out huge hp or drag racing, the 47/48re is the way to go.

Just my oppinion

ben

 

dura,

Not everyone here is interested in drag racing and quick shifting. Build the 48RE all you want and it still only has four poorly spaced gears. It's more gears and better spacing along with a more durable tranny that I want. And it's not a choice of the 48RE or the Allison. Everytime someone complains about the 48 someone else chimes in with "yeah but the Allison is no better". Who cares? It's not about the Allison. I have a 48 and that's the tranny I am talking about.

We need a 68 conversion or a Aisin conversion, not an Allison conversion. I don't care about the Allison and I can complain about the 48 without comparing it to the Allison.

The 48 is only good for stock power and light loads. Built, it is good for racing. I tow, I don't race and I don't want an Allison. Make the 48 as strong as you like and it still sucks for towing.

John

 

ahh yeah I meant to add the towing part to my first post...I tow stuff (12k lbs and under) all summer and if I switch to my big tune and go WOT, the trans freaks out

I doubt an Aisin conversion will be possible because it is somewhat a spin off of the allison (no Im not just saying that because im jealous or something, Aisin and allison have many joint ventures together around the world, take both the aisin and ally apart and they look quite similar)....meaning it uses clutch-to-clutch technology so without the proper computer integrating it completely with the CTD, its going to work just about as well as an allison swap.

IMHO, 68rfe swap shows promise because as far as I know it uses the older technology (overrunning clutches) of the 48re to accomplish shifting....meaning all we need is PCS to come out with a standalone controller and the swap should be "simple". I dont think it will be too long until someone gets it up and running....

JMO

ben

 

Dura,

I hope you're right about the 68 conversion. It should be only an electrical problem. It's so new and unproven but we'll know pretty soon about it's reliability. I just rode in a new 6.7 over the weekend and that tranny was sweet! And the little shifter button on the lever is great too. Of course there will be driveshaft and mounting issues but I'm not worried about that. I'm hoping the floor is the same and will fit the 68 without body work.

When you talk about the clutch to clutch design of tha Aisin and the more complicated controller are you saying there is no governor in that style tranny? What makes the control so much harder?



John

 

I'm just kinda hopping into this thread...

But here is my question:

If you guys want to tow extremely heavy, and not worry about going fast, why not get a 6spd manual? That way you have 6 gears, lockup in every gear, and it seems like a manual would cause less headaches than an auto would.

And this is coming from me with 2 Dodge diesels with automatic transmissions, (one upgraded though ).

I don't tow stuff for a living or anything, but that would just be my opinion.

I would have actually preferred to have a 5spd in my dually especially, but well I don't feel it was something worth passing over the truck for.

For the cost of trying to swap a transmission not designed for the truck into one, I'd just rather shift gears myself and have a slightly tired arm and left leg at the end of the day than have an automatic that kept blowing up on me causing lots and lots of headaches!