Forum Discussion

bluwtr49's avatar
bluwtr49
Explorer II
Oct 09, 2014

Allison Fluid Level Questions

Quick question on the Allison 4000,

Using the Keypad to check level I got an indication that is was 7 qts low. The display would flash O, than L, than a minus sign (-) than 7. It would move between 5 and 7 depending if the engine was running or not. The coach was level and the tranny temp at ~190 or so.

I added 4 qts of Dexron but the level didn't come up so I checked the dipstick and it shows really overfull under the same conditions.

Feedback would be appreciated. I'm reluctant to add more fluid until this is resolved. I only have a couple of hundred mile to get her home and than it goes into the shop for a fluid change to Transynd.

Dick

15 Replies

  • Ozlander wrote:
    You added ATF before you checked the dip stick????


    Of course....oh, I just noticed, your TT doesn't have an Allison.
  • Two Questions, Were you level? Did you let it idle several minutes before reading the level. These two are necessary in order to get a true measurement. Good Luck!
  • Sounds like maybe you did not wait for the countdown??? After starting the sequence they will count down...some start at 7 some start at other numbers, until the they flash O-L and a number. If it did not do the countdown it probably is overfilled.
  • Was there any sign of leakage? If not you probably have a bad sensor. Are there any truck shops near you to go to?
    If not I would drain the excess fluid out and go with the dipstick level to get you home. Too much fluid can cause excessive pressure in the transmission as well as foaming of the fluid. Both can cause expensive damage to your transmission.