Jump to content
Sign in to follow this  
ThaddeusW

12 Speed Mack Behind A Cat?

Recommended Posts

I was poking around some of my Mack photos the other day when I was reminded of an Australian Superliner that was said to have a 12 speed Mack transmission behind a 425HP 3406B. Has anyone here ever heard of this combination?

Share this post


Link to post
Share on other sites

I havent heard of a factory mack truck built with a mack trans behind an off breed engine but I guess it could be true? i would think you need to use most of the 12 forward gears to keep the cat in its power band?

Share this post


Link to post
Share on other sites

forgot about some of the cummins. but they are still pretty rare. A few superliners I drove had Cummins but had eaton trans behin them. only seen one cat powerd mack in person. but this is Chicago and in its day it was all mack or nothing.

Share this post


Link to post
Share on other sites

A 12 speed behind a 3406B would be a great combination for a tractor that pulls a lowboy or a dump trailer.

Since all the class 8 bellhousings, clutches, input shafts etc. are SAE standard, there would be no problem with mating the 12 speed to the Cat.

.

Share this post


Link to post
Share on other sites

Not popular,but has been done(mack trans behind a vendor engine)

If the customer wanted vendor engine(usually to match their other trucks in the fleet)They were also looking for Fuller trans(cheaper to order, rebuild and driver friendly)

Know of a 1994 CL, 3406c with a Mack 18.

Just look at the new Macks,All of the Mack trans are behind volvo engines :lol:

Share this post


Link to post
Share on other sites
Guest 45LMSWM

I have seen newer Mack Cls with 18 speed Mack transmissions and Cummins power. I am also pretty sure that a contractor in Philadelphia ran 3406 Cats with twelve speed Mack transmissions in their lowboy tractors.

-John

Share this post


Link to post
Share on other sites

A friend of mine has a 1982 R-700 Mack triaxle dump with a 3406 Cat and 8LL. bad1989gti , You probably remember it when J+R from Pittston ran it with H+k. Owner now runs it with American asphalt. Joe D.

Share this post


Link to post
Share on other sites

A friend of mine has a 1982 R-700 Mack triaxle dump with a 3406 Cat and 8LL. bad1989gti , You probably remember it when J+R from Pittston ran it with H+k. Owner now runs it with American asphalt. Joe D.

You know Rayjoe.......Not sure of the spelling.

Is he on here..... bad1989gti ????

That was Joe's truck,, then (Hook Man) ran it until he retired

Share this post


Link to post
Share on other sites

Durkin contractors from Philly ran a DM 800 (unit # T060) with a 3406A with a 12 speed. Also, whem I worked for Brubacher excavating, They had 2 R 754's that ran 12 speed's behind 3406A Cat's. Both trucks came from Canada originally. As a side note I currently run a CL 733 with a Mack 18 speed trans. post-4550-12649022684527_thumb.jpgpost-4550-12649023485482_thumb.jpg

Share this post


Link to post
Share on other sites

Hello from Australia

Yes I can remember several COE MACKs powered by 3406 CATS with 12 speeds fitted.

They were owned by a farmer pulling fridge vans, factory fitted around about 1980s.

Also of interest I can also remember three (3) R700s fitted with Cummins 400s

in the mid 1970s, factory fitted for Wettennalls transport.

Some early R700s V8s (865 & 866s?) were repowered with CAT 3408s especially

those involved with heavy haulage (low loaders etc).

Gary

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...