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 07-14-2017, 03:26 PM   #1
Skoolie
 
Clayton's Avatar
 
Join Date: Nov 2016
Location: Alberta
Posts: 134
Year: 1996
Coachwork: Thomas 72 passenger
Chassis: International 3800
Engine: 230HP DT466 engine MD3060 transmission
MD3060 Allison Transmission Leak

My Allison MD3060 has a leak. It is from what looks to be an expansion plug that plugs a hole that is used for a dipstick in some applications. I found that info from looking at diagrams. I tried to tighten it up but the nut just goes round and round. If I loosen it, lots of transmission fluid leaks out. I assume I need to replace it. I don't know how to get it out other than loosening it the most I can and prying it out. Or where to get a replacement plug. Any advice appreciated.
Attached Thumbnails
untitled (3).png  

Clayton is offline   Reply With Quote
Old 07-14-2017, 04:17 PM   #2
Bus Geek
 
Join Date: May 2014
Location: West Ohio
Posts: 3,678
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
Drain the fluid, drop the pan, and see if there is a nut on the bottom side. If there is, re-tighten the bolt while holding the nut. Reinstall the pan and then fill the trans back up and check for leaks.
Booyah45828 is offline   Reply With Quote
Old 07-14-2017, 04:46 PM   #3
Traveling
 
Join Date: Nov 2015
Location: Midwest
Posts: 2,573
Year: 2003
Coachwork: BlueBird
Chassis: TC2000
Engine: 5.9L Cummins
Rated Cap: '00
Quote:
Originally Posted by Booyah45828 View Post
Drain the fluid, drop the pan, and see if there is a nut on the bottom side. If there is, re-tighten the bolt while holding the nut. Reinstall the pan and then fill the trans back up and check for leaks.
That is a lot of work on that trans if it isn't due for service. Many bolts, new gasket, etc.

My advice is to call a few Allison shops- make sure they are rated for 3000 series as some are not setup for heavy trans. Explain and maybe it is externally repairable plug.
Rusty is offline   Reply With Quote
Old 07-14-2017, 04:48 PM   #4
Traveling
 
Join Date: Nov 2015
Location: Midwest
Posts: 2,573
Year: 2003
Coachwork: BlueBird
Chassis: TC2000
Engine: 5.9L Cummins
Rated Cap: '00
Quote:
Originally Posted by Booyah45828 View Post
Drain the fluid, drop the pan, and see if there is a nut on the bottom side. If there is, re-tighten the bolt while holding the nut. Reinstall the pan and then fill the trans back up and check for leaks.
That is a lot of work on that trans if it isn't due for service. Many bolts, new gasket, etc.

My advice is to call a few Allison shops- make sure they are rated for 3000 series as some are not setup for heavy trans. Explain and maybe it is externally repairable plug.

Else pull plug and fish nut out with magnet. maybe rubber plug is just shot.
Rusty is offline   Reply With Quote
Old 07-14-2017, 10:54 PM   #5
Skoolie
 
Clayton's Avatar
 
Join Date: Nov 2016
Location: Alberta
Posts: 134
Year: 1996
Coachwork: Thomas 72 passenger
Chassis: International 3800
Engine: 230HP DT466 engine MD3060 transmission
Thanks, what kind of fluid does this take?
Clayton is offline   Reply With Quote
Old 07-15-2017, 03:55 AM   #6
Bus Crazy
 
Join Date: Mar 2011
Location: Oregon/Philippines
Posts: 1,660
tes 295,etc.. fluid
look up your tranny on the allison website.
if you change your fluid, you are good many yrs of normal skoolie convrsion driving
__________________
Jesus Christ... Conversion in progress.
chev49 is offline   Reply With Quote
Old 07-15-2017, 09:10 AM   #7
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
I have been googling to try and find you the dipstick plug and cant find the part number.,. my allison trans was built to use a dipstick on either side.. left or right... it has a standard dispstick seal and then a plastic snap-in plug that fits inside of said seal... you move the plug to the side opposite where you wsnt your dipstick..

im thinking an allison rebuilder probably has these things laying around as any rebuild would need one.. you may be able to just pull that seal out{pull straight up} (yes your fluid will come out) and use a new dipstick seal with the same plug? hard to tell without a pic.

-Christopher
cadillackid is offline   Reply With Quote
Old 07-15-2017, 10:20 AM   #8
Skoolie
 
Clayton's Avatar
 
Join Date: Nov 2016
Location: Alberta
Posts: 134
Year: 1996
Coachwork: Thomas 72 passenger
Chassis: International 3800
Engine: 230HP DT466 engine MD3060 transmission
I will do a drain and refill and see if there is a nut that is spinning on the other side. But it will be a couple weeks before I can do this as it is more of a big job than I thought. I will keep you all posted. Thanks
Clayton is offline   Reply With Quote
Old 07-15-2017, 10:54 AM   #9
Bus Crazy
 
turf's Avatar
 
Join Date: Apr 2013
Location: Colorado
Posts: 2,356
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison AT1545
Rated Cap: 2
you should pull the plug just to see whats there. if it spins freely, it ought to be loose enough to pop out.

i have a similar dipstick plug with my new trans, and its better than the old one so i was seeing if i could modify it.

anyway, the piece i have has slotted threads on the lower portion of the bolt, this seems to keep the nut from coming loose.

mine is different in that it has the T top dipstick handle, but maybe you have some threads that saved the nut.

if you want a picture of my plug i can easily oblige
__________________
.
Turfmobile Build Thread
turf is offline   Reply With Quote
Old 07-15-2017, 12:33 PM   #10
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
turf, you dont have the deep pan? where the dipstick oges into the side of the pan?
cadillackid is offline   Reply With Quote
Old 07-15-2017, 05:49 PM   #11
Bus Crazy
 
turf's Avatar
 
Join Date: Apr 2013
Location: Colorado
Posts: 2,356
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison AT1545
Rated Cap: 2
this dipstick was just sitting in one of the big mounting holes on top.

the rubber is nicer than my dipstick so i was looking at swapping them, but this one is much fatter and doesn't fit the tube.

the vertical cuts through the threads keep me from easily undoing dipstick part. perhaps allison specs their plugs the same way.
__________________
.
Turfmobile Build Thread
turf is offline   Reply With Quote
Old 07-17-2017, 08:58 AM   #12
Bus Geek
 
Join Date: May 2014
Location: West Ohio
Posts: 3,678
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
I've never had trouble reusing the gaskets, so unless you tear them upon removal, you should be ok. I also don't think that any of the covers can be removed for access either. You can try removing the plug without dropping the pan and see what that gets you, but be prepared to drop the pan if you have to.
Booyah45828 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 04:32 AM.


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