Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-02-2015, 02:01 PM   #1
Rivet Master

 
Currently Looking...
1995 36' Classic 36
Ludington , Michigan
Join Date: May 2011
Posts: 1,305
Allison MD3060 Fluid/Filter Change

First, it's a pretty simple procedure and their are a bunch of posts and YouTube videos on the topic. I spend countless hours stuck in hotel rooms with my job and over research these things to kill time. There a few things to be aware of so I thought I'd share.

First, be very careful not to introduce dirt into the system. You will probable be at least as careful as the "professionals". Power wash or at least clean the bottom of the transmission. Work on a clean surface.

The bottom of the transmission is not an oil pan. It's the controls module and its heavy. You don't want to remove it. There are two round covers that are held on by 6 bolts each. They do not drain the oil. They are removed to replace the filters. You will loose a quart or so when they are removed.

The drain plug is opposite them on the bottom. It's removed with a 3/8" ratchet stuck in the square hole. It will drain about 4 1/2 gallons. A 5 gallon plastic bucket will not fit under it unless you jack up the coach. Two 3 gallon buckets worth nicely. Be ready to slide the next one in as the first gets full. I like to start with clean white bucket so I can examine the fluid and fill a sample bottle.

The best deal I found on genuine Allison filters was at Transwest Truck Parts. About $65 for the kit. There are complete instructions in the kit along with o rings and seals for two different configuration. Somewhere around 98 they switched from a square cut seal ring to a large o ring and gasket. Put the right set in based on the serial number range specified in the instructions.

Torque them as specified! You can strip them. The covers should pop up completely in place with the palm of your hand. Don't draw them up with the bolts or you will be hating life. Use a cross pattern to tighten them in steps. This in in the instructions.

There is also a new ring for the drain plug. It's torque spec is much less than you might expect. Be careful! Use a 3/8" torque wrench.

You can read for hours about fluids. Transwest has Transyn on the shelve for $45 a gallon. The 4" sump version takes about 5 gallons. The filters for the 4" sump are about 6" long.

The transmission originally came with Dextron 2. The new Dextron "compliant" fluids are not compatible with the seals in our vintage Allison and can cause them to fail. That goes for some of the new snake oil additives also. Call Allison if you have any questions.

Make sure the area around the dip stick is clean. Important when you check the fluid level also. These rear engine units tend to get pretty dusty. A 3/4" OD clear hose works well to fill through the dip stick tube. Set the jug on a ladder or hang it and start a syphon.

Allison doesn't recommend any type of power flush due to the potential of damaging seals. There will be an amount of fluid trapped in the torque converter. They seem to just accept that. If the fluid smelled burnt or was badly discolored, I'd call Allison. You will probably need more than an fluid change anyway.

That's it.
__________________

__________________
Kota is offline   Reply With Quote
Old 05-02-2015, 02:06 PM   #2
Rivet Master

 
Currently Looking...
1995 36' Classic 36
Ludington , Michigan
Join Date: May 2011
Posts: 1,305
Click image for larger version

Name:	ImageUploadedByAirstream Forums1430593577.989640.jpg
Views:	185
Size:	168.6 KB
ID:	237604

Click image for larger version

Name:	ImageUploadedByAirstream Forums1430593604.973812.jpg
Views:	227
Size:	98.8 KB
ID:	237605
__________________

__________________
Kota is offline   Reply With Quote
Old 05-02-2015, 02:08 PM   #3
Rivet Master

 
Currently Looking...
1995 36' Classic 36
Ludington , Michigan
Join Date: May 2011
Posts: 1,305
Click image for larger version

Name:	ImageUploadedByAirstream Forums1430593674.419919.jpg
Views:	212
Size:	93.7 KB
ID:	237606
__________________
Kota is offline   Reply With Quote
Old 05-02-2015, 03:40 PM   #4
Rivet Master
 
wxbuoy's Avatar
 
1991 35' Airstream 350
Carriere , Mississippi
Join Date: Oct 2009
Posts: 1,205
Send a message via Skype™ to wxbuoy
Thanks! I need to tackle that project as well!!!
__________________
Dave and Felicia
wxbuoy is offline   Reply With Quote
Old 05-06-2015, 09:55 AM   #5
Rivet Master

 
Currently Looking...
1995 36' Classic 36
Ludington , Michigan
Join Date: May 2011
Posts: 1,305
Allison MD3060 Fluid/Filter Change

Step 1

When I inspected this vehicle there was sludge on the bottom of the dipstick. I'm first priority was to service the transmission. The filters looked good, no sludge in the bottom of a clean drain bucket, and the fluid looked and smelled ok.

After service I had sludge on the bottom of the dipstick again. WTF!

Any moisture that cooks out of the transmission after sitting collects in the dipstick tube and create corrosion and sludge. Further proof that moisture from sitting is a bigger issue on these rigs than milage. Only 32k miles on a 20-30 year old rig might not be as significant as used regularly.

Click image for larger version

Name:	ImageUploadedByAirstream Forums1430923955.028980.jpg
Views:	137
Size:	248.9 KB
ID:	237887

Click image for larger version

Name:	ImageUploadedByAirstream Forums1430923989.927547.jpg
Views:	149
Size:	113.3 KB
ID:	237888

You can see the where the dipstick scrapes the side of the sludge in the tube!

The tube is fairly easy to remove and clean. Should have been the first step before dumping $250 worth of Transyn through it.
__________________
Kota is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Allison tranny fluid mayco Mechanics Corner - Engines, Transmission & More... 3 06-10-2014 09:35 PM
Brake fluid change wvabeer Land Yacht/Legacy Motorhomes 21 03-15-2014 01:59 PM
Transmission fluid change ? wvabeer Land Yacht/Legacy Motorhomes 22 02-26-2013 06:44 PM
P-30 Transmission Fluid change interval crazeevw General Motorhome Topics 11 12-08-2011 04:59 PM
Do I change transmission fluid? Matt Kline Tow Vehicles 10 06-22-2010 08:33 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:05 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.