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Topic: Allison 4000 Series Sump Depth (Read 628 times) previous topic - next topic

Allison 4000 Series Sump Depth

Is the sump on a 2003 U320 a 4 inch depth or a 2 inch depth? I am interested in this to determine the fill capacity and the proper change interval.  I do not have the coach yet (which would allow me to just measure it), but plan to pick it up in about 4 to 6 weeks.

Thank you,
2003 U320 4010 - SOLD
2014 RAM 1500 Ecodiesel

Re: Allison 4000 Series Sump Depth

Reply #1 –

  Hello Ed,
    My 2003 U320 has the 4 inch sump,  and took 39 qts for a drain and refill.
            Jim
Jim & Doreen
2003 U320

 "Too often I would hear men boast of the miles covered that day, rarely of what they had seen"
― Louis L'Amour

Re: Allison 4000 Series Sump Depth

Reply #2 –
Our 1995 U320 is in storage but from memory is looks as if it would be the 4-inch sump.
David and Carolyn Osborn
1995 U320C SE 40' Build 4726 Feb 1995
FMCA 147762
Motorcade 17186

Re: Allison 4000 Series Sump Depth

Reply #3 –
If I remember correctly think all the foretravel coaches had the 4 inch sump
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins

Re: Allison 4000 Series Sump Depth

Reply #4 –
Thank you for the replies. I think I should plan on getting 40 quarts of fluid.  The owner has been using Amsoil Torque Drive in the trans. It looks easy enough to change as a do-it-yourself project.  Just need to get a large enough drain pan.
2003 U320 4010 - SOLD
2014 RAM 1500 Ecodiesel

Re: Allison 4000 Series Sump Depth

Reply #5 –
Make sure to use a torque wrench (INCH-lb) on the filter housing bolts.  Steel into aluminum.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Allison 4000 Series Sump Depth

Reply #6 –
I just did a complete filter and fluid change ten days ago.  What I did is collect the fluid in a 5 gallon drain pan, then fill 5 gallon paint buckets with the fluid.  I did this until nothing came out again.  When done I actually had only 32 quarts of fluid although the manual says that it uses approx. 39 quarts.  Went for a test ride then checked on my keypad and all OK.  Now I have no idea where the other fluid is but it is what it is.  I do check samples at a testing lap every two years or sooner based on the lab results.  So not to steal the thread where is the other fluid that didn't come out?

Re: Allison 4000 Series Sump Depth

Reply #7 –
Quote from: esaulten –
I just did a complete filter and fluid change ten days ago.  What I did is collect the fluid in a 5 gallon drain pan, then fill 5 gallon paint buckets with the fluid.  I did this until nothing came out again.  When done I actually had only 32 quarts of fluid although the manual says that it uses approx. 39 quarts.  Went for a test ride then checked on my keypad and all OK.  Now I have no idea where the other fluid is but it is what it is.  I do check samples at a testing lap every two years or sooner based on the lab results.  So not to steal the thread where is the other fluid that didn't come out?


Torque converter retains oil
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4
 

Re: Allison 4000 Series Sump Depth

Reply #8 –
Probably in the torque converter
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean