transmisson selection

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Jun 8, 2014 | 07:54 PM

Eaglescout94

Thread Starter

Laughing Gas

Joined: Feb 2014

Posts: 1,041

Likes: 72

From: Springfield

transmisson selection

I'm building a custom medium duty truck and need to figure out what transmission option will be best. I have an Allison AT545 already bolted to my motor but Ill have to change the mounts, driveshaft and possibly even the yoke to make it work. I have a Eaton RT6609A that will need a clutch and maybe flywheel but it will bolt right up with everything else. It also already has a pto which I will need. Im leaning towards the Eaton but would appreciate some other input.

Jun 11, 2014 | 08:09 PM

Eaglescout94

Thread Starter

Laughing Gas

Joined: Feb 2014

Posts: 1,041

Likes: 72

From: Springfield

I already know neither transmission has an overdrive so it just comes down to which would be cheaper and easier to make work. The truck has a 4.88 ratio. Anyone have an opinion?

Jun 11, 2014 | 09:36 PM

Joaquin Suave

Trailering

Joined: Jul 2010

Posts: 17

Likes: 1

Why don't you tell us a little more about your intended use of the truck? I did a complete re-motor, re-driveline about 5 years ago and am out of this world stoked about the trucks performance!!! You might not need/ want to go to the extremes I did, but I might be able to offer you some advice regarding components and vendors.

Jun 12, 2014 | 07:50 AM

3414

Elder User

Joined: Jun 2008

Posts: 693

Likes: 6

From: N E Ohio

You might want to check that Allison AT545, the ones I have seen are direct, not OD. Do you want an automatic or a manual is the first question to ask yourself.

Jun 12, 2014 | 06:57 PM

Eaglescout94

Thread Starter

Laughing Gas

Joined: Feb 2014

Posts: 1,041

Likes: 72

From: Springfield

3414 - I know that the At545 doesn't have OD but neither does the Eaton. As far as what I want, Id prefer the manual and to me it seems like it makes more sense to just buy a clutch and bolt it up.
Joaquin Suave - The truck currently has a hydraulic 9'x7'x2' dump bed but I was considering at some point pulling it off and putting a 5th wheel and running the needed air lines for air brakes to pull trailers.(truck has air brakes)