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 Search this Thread Display Modes
 
Old 03-12-2015, 12:50 PM   #1
Rivet Master
 
mayco's Avatar
 
1982 31' Airstream 310
champaign , Illinois
Join Date: Oct 2012
Posts: 4,071
Allison at545

Does anyone know how much fluid to add to the spec for the tranny cooler on an Allison at545. The tranny holds 5ga but I dont know how much more to add for the stock cooler. Its hard getting an accurate reading on the dip stick. Many thanks for the info.

Mike
mayco is offline   Reply With Quote
Old 03-12-2015, 03:49 PM   #2
4 Rivet Member
 
shepherd57's Avatar
 
1985 32.5' Airstream 325
Lindsay , Ontario
Join Date: Aug 2010
Posts: 479
Images: 5
Mike
I check mine with the engine running in neutral, Seems to work for me mine is hard to read to. Here is a page from my Allison handbook
Attached Thumbnails
Click image for larger version

Name:	Allison oil check.jpg
Views:	208
Size:	117.8 KB
ID:	234045  
shepherd57 is offline   Reply With Quote
Old 03-12-2015, 06:10 PM   #3
Rivet Master
 
mayco's Avatar
 
1982 31' Airstream 310
champaign , Illinois
Join Date: Oct 2012
Posts: 4,071
Thats a nice sheet.....ill save that. Ill get it out here in the next few days and get her up to temp and look again. Specs say five gallons with the standard oil pan, a lityle under four ga with the shallow pan. Im assumed this has the standard pan but Ill measure that tomorrow. Little over 11" from center line for standard pan. That dip stick gets oil trails up the sides and with clean fluid its hard for me to get a good reading on the actual level. Thanks for that sheet, very helpful.

Mike
mayco is offline   Reply With Quote
Old 03-17-2015, 07:30 PM   #4
Silver Bullet
 
choctawmel's Avatar
 
1986 34.5' Airstream 345
choctaw , Oklahoma
Join Date: Mar 2006
Posts: 839
Images: 1
my oh my.. You have a 545? The po had a 545 installed in my 'silver bullet'. Was a good transmission, but couldn't take much more input torque than the stock(weak) 454.
Mine died and I replaced it with a 4L80e. Turned out the installers of the 545 missed the hole in the crank with the tit of the torque converter is the reason for the failure.
I'm not sure I'm all that happy with the 4L80e. But it is working with a 496cid motor with a lot more torque then the 545 was make to handle.
choctawmel is offline   Reply With Quote
Old 03-17-2015, 07:54 PM   #5
4 Rivet Member
 
shepherd57's Avatar
 
1985 32.5' Airstream 325
Lindsay , Ontario
Join Date: Aug 2010
Posts: 479
Images: 5
I have the 545 in my Isuzu powered 32.5 it is a good trans but it has no lockup converter and no overdrive. I am thinking about putting in an Allison 5 speed with the lockup converter. It will bolt right in and will need a stand alone wiring harness and Allison TCM to make it all work
shepherd57 is offline   Reply With Quote
Old 03-18-2015, 09:03 PM   #6
Silver Bullet
 
choctawmel's Avatar
 
1986 34.5' Airstream 345
choctaw , Oklahoma
Join Date: Mar 2006
Posts: 839
Images: 1
Quote:
Originally Posted by shepherd57 View Post
I have the 545 in my Isuzu powered 32.5 it is a good trans but it has no lockup converter and no overdrive. I am thinking about putting in an Allison 5 speed with the lockup converter. It will bolt right in and will need a stand alone wiring harness and Allison TCM to make it all work
In your application I'd stay with the 545 and change the rear end gear to get the same effect as an overdrive. The 545 has so many clutches/plates it is better than a 'lock up' convertor.
I should/would have done that except I increased the input torque well above the max input for the 545
choctawmel is offline   Reply With Quote
Old 03-19-2015, 02:17 PM   #7
Rivet Master
 
mayco's Avatar
 
1982 31' Airstream 310
champaign , Illinois
Join Date: Oct 2012
Posts: 4,071
If you are willing to forgive my mechanical ignorance, could you explain what all gets changed out when changing the gear ratio in the differential? In our case obviously we would want to reduce rpms at cruising speed to reduce wear and tear on the motor. Is the gear change isolated to the ring and pinion gears or all the gears in the rear end? I would assume while having it tore down you would replace all bearings and such. What type of reduction in rpms could be accomplished while still having reasonable lower end torque? Im happy driving at 60-65 mph but 2700+ rpms has always seemed pretty high to me. I would never try to open up the rear end myself, I would pay to have it done. What type of cost are we talking about......ball park? Ive heard and read very good things about my at545 and dont think I would consider messing with it. Especially since I dont have the mechanical abilities to do the work myself.
mayco is offline   Reply With Quote
Old 03-19-2015, 06:20 PM   #8
4 Rivet Member
 
shepherd57's Avatar
 
1985 32.5' Airstream 325
Lindsay , Ontario
Join Date: Aug 2010
Posts: 479
Images: 5
Mike
You could change the rear end ratio to a 4.10 it would have to be done by a rear end shop

choctawmel

I think you will find that the Allison 2000 series 5 speed has more than enough strenght to handle what a 454 can put out they are used behind the Duramax diesel in med duty trucks to 30.000 lbs



Allison-Transmission-2000-Series-Spec-Sheet.pdf
shepherd57 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 Transmission ??? thenewkid64 Mechanics Corner - Engines, Transmission & More... 10 02-06-2022 04:54 PM
Calling all Duramax/Allison owners Silvertwinkie Tow Vehicles 31 10-04-2004 05:19 AM
Where is the Speed Sensor? (Allison Tranny Error) Griffin Mechanics Corner - Engines, Transmission & More... 4 12-16-2003 04:57 PM
Duramax-Allison Pahaska Tow Vehicles 34 11-23-2003 10:55 PM
Allison auto transmission O/D lockout davidz71 Tow Vehicles 0 01-20-2003 10:28 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 05:34 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.