6066 (1960-1966) GMC Truck Club

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6066 (1960-1966) GMC Truck Club (https://6066gmcclub.com/index.php)

- GMC V6 and V12 Engines (https://6066gmcclub.com/forumdisplay.php?f=9)

- - stuck 478 (https://6066gmcclub.com/showthread.php?t=47788)

abus319

April 17th, 2015 11:49 AM

Re: Allison 6 Speed GMC 401

Quote:

Originally Posted by bigblockv6 (Post 57561)

It is for an automatic, came off a 73 Tilt Cab 7500 series.

I am interested, I sent a PM. What are you asking for it?

bigblockv6

April 17th, 2015 12:04 PM

Re: Allison 6 Speed GMC 401

Quote:

Originally Posted by abus319 (Post 57563)

Bigblock
I might be interested. I don't have a specific application for the motor yet. I just need a way to start and run it a bit.
I wiil PM ya..

My private messages may not be reaching you, I just sent you another one so let me know if you got it.

abus319

April 17th, 2015 12:16 PM

Re: Allison 6 Speed GMC 401

Bigblock, Nothing yet. I will PM you my email.

Jeannie

April 17th, 2015 12:29 PM

Re: Allison 6 Speed GMC 401

Quote:

Originally Posted by bigblockv6 (Post 57587)

My private messages may not be reaching you, I just sent you another one so let me know if you got it.

Private messages are immediately delivered unless there is a error in the address of the recipient, your PM box is full, or no subject is specified. You will see an error notice after clicking submit if an error occurs. If your PM box is full you may need to delete some of your sent or received messages or upgrade your account to a Site Supporter.

-Jeannie

6066 GMC Club

turbobill

April 17th, 2015 11:13 PM

Re: Allison 6 Speed GMC 401

Quote:

Originally Posted by WE7X (Post 57584)

For something like 15 years, I have had an Allison AT from a 6500 or 7500 chassis. Would that likely be an MT40? I know I received a cable shifter assembly with it, that is about 25 feet too short for my rear engine configuration.
If I recall correctly, I was told it would have been a 5 speed, but I am not sure. Were they five speed, or six?

The plan back then, was to put it into my RM7500 'Motorhome', along with a 478M; to replace my 401M and the 5x2 Manual transmission. No progress yet, on that plan.
Rod J
Issaquah, WA

Allison (under GM) made 4, 5 and 6 speed automatics. The first ones were the MT (Medium Truck) series (30 and 40). They were all six speeds, direct in top gear, and date to the mid 1950's and were produced into the early 70's

abus319

April 29th, 2015 03:51 AM

Re: stuck 478

Soo it looks like I have a flywheel coming for the 478!!
Now I gotta go dig it out, it drifted to the end of the projects line.
Its so far back, there are not even lights (the shop lights are on the project line as well).

abus319

May 14th, 2015 03:53 AM

Re: stuck 478

1 Attachment(s)

I got the flywheel this weekend, but didn't get around to putting it on until today. Actually its temporarily in place till I find some 1 3/4 bolts, or cut the 2' down.
I hope this is the way it bolts on I don't deal with automatics much. It was a bit confusing to have starter gear wear on both sides of the flywheel and no threaded flex plate mounts.
I got the rusty freeze plugs out and did a little cleaning.
(The red valve cover is off of the 3500 project)
I have a pretty long list of things that need to be taken care of before I fire it up, but its on its way!

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