Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
 
Old 03-28-2020, 10:34 AM   #1
Mini-Skoolie
 
Join Date: Jun 2019
Location: Pasadena, TX
Posts: 15
Year: 1988
Chassis: Ford
Engine: 6.6L Ford/New Holland
Rated Cap: 36 Passengers
Ford/New Holland 6.6L / MT-643

Anyone have the Ford/New Holland 6.6L with the Allison MT-643 tranny combination? My ‘88 Ford/Ward has the AT-545 and I have some questions before I purchase an MT- 643 that I found to upgrade mine. Any help is much appreciated. Thanks in advance.

Diehard is offline   Reply With Quote
Old 03-28-2020, 12:38 PM   #2
Bus Geek
 
brokedown's Avatar
 
Join Date: Dec 2016
Location: Weeki Wachee, FL
Posts: 3,056
Year: 1997
Coachwork: Bluebird
Chassis: TC2000 FE
Engine: Cummins 5.9
Rated Cap: 72
I've got a friend with the 7.8L ford/new holland with the mt643 in it. I understand the 7.8 and 6.6 to be mostly the same engine but a different stroke. I can pass your questions along if you like.
__________________
Keep up with us and our build!
Follow us on Facebook, Instagram, YouTube, and Twitter
brokedown is offline   Reply With Quote
Old 03-28-2020, 04:57 PM   #3
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 6,402
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Do New Holland tractor dealers work on the old 6.6/7.8's?
PNW_Steve is offline   Reply With Quote
Old 03-29-2020, 03:49 PM   #4
Mini-Skoolie
 
Join Date: Jun 2019
Location: Pasadena, TX
Posts: 15
Year: 1988
Chassis: Ford
Engine: 6.6L Ford/New Holland
Rated Cap: 36 Passengers
Brokedown, I had wondered if I’d need an adapter plate to mount the MT-643 to my 6.6L? Today, I had a chance to pull off the floorboard panel covering above the bellhousing on mine and found the answer I’ve been searching for. Since my 6.6L/AT-545 has a SAE #3 bellhousing, and the MT-643 I found has a SAE #2 being larger in diameter, I figured there had to be an adapter plate somewhere. Answer: the adapter plate is already mounted on my engine to attach the AT-545. I just have to remove the adapter plate to install the MT-643. Problem solved. And thanks for offering to pass on my question. If in fact I do come up with any questions about the 643, I will message you. Thanks again...
Diehard is offline   Reply With Quote
Old 03-29-2020, 04:20 PM   #5
Mini-Skoolie
 
Join Date: Jun 2019
Location: Pasadena, TX
Posts: 15
Year: 1988
Chassis: Ford
Engine: 6.6L Ford/New Holland
Rated Cap: 36 Passengers
PNW STEVE, I can’t answer your question about New Holland tractors, but to say, I wouldn’t think so. I would think an older diesel mechanic would be your best bet. If you’re a do-it-yourself kind of guy, google it and jump right in. YOUTUBE has a lot of videos as well. Good luck.
Diehard is offline   Reply With Quote
Old 03-29-2020, 06:31 PM   #6
Bus Geek
 
Join Date: May 2014
Location: West Ohio
Posts: 3,829
The flywheel housing adapter plate is just the beginning of the difference. Since the at545 and mt643 have different torque converters(because of the lockup clutch), most swaps will require a different flexplate/spacer/flywheel arrangement. Check into that as well before you rip everything apart, get stuck, and need to move the bus.
__________________
My build: The Silver Bullet https://www.skoolie.net/forums/f11/p...llet-9266.html
Booyah45828 is offline   Reply With Quote
Old 03-29-2020, 08:11 PM   #7
Mini-Skoolie
 
Join Date: Jun 2019
Location: Pasadena, TX
Posts: 15
Year: 1988
Chassis: Ford
Engine: 6.6L Ford/New Holland
Rated Cap: 36 Passengers
Will do. Thanks for your input.
Diehard is offline   Reply With Quote
Old 06-26-2020, 08:21 PM   #8
Bus Nut
 
Ninjakitty's Avatar
 
Join Date: Jan 2018
Location: Brevard County, FL
Posts: 911
Year: 1990
Coachwork: Bluebird
Chassis: Ford
Engine: 6.6 New Holland Diesel
Rated Cap: 60 kids, 10 window
Anyone have know the location of the oil pressure sensor on the 6.6? I had a flood come in the dash thw othwr day amd now my gauge isn't working. I was thinking of juat bypassing the old gauge and adding a new one but I'm not quite sure where the gauge is located. I've already searched google. Thanks!
__________________
Nick
Ninjakitty is offline   Reply With Quote
Old 07-14-2020, 09:21 PM   #9
Mini-Skoolie
 
Join Date: Jun 2019
Location: Pasadena, TX
Posts: 15
Year: 1988
Chassis: Ford
Engine: 6.6L Ford/New Holland
Rated Cap: 36 Passengers
oil pressure sensor location

l will look at my engine manual when I get back home this weekend and see if I can help you out. Sorry, I haven't been on the forum for a while and just saw your question tonight.
Diehard is offline   Reply With Quote
Old 10-10-2024, 01:33 AM   #10
New Member
 
Join Date: Oct 2024
Posts: 1
Quote:
Originally Posted by brokedown View Post
I've got a friend with the 7.8L ford/new holland with the mt643 in it. I understand the 7.8 and 6.6 to be mostly the same engine but a different stroke. I can pass your questions along if you like.
Any chance you can ask your friend what flywheel/flex plate will join the 6.6l/7.8l to the mt643?
Nofubars is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:31 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.