I would highly suggest Allison Transynd synthetic fluid, For all on highway models.
allisontech
transmission down shift after fuild change
mercon v
Read you owners manual.. that's what its there for.
when to change transmission fuild in 2005 highlander
Allison Transmission was created in 1915.
Allison transmission not shifting
The fluid capacity, of your Allison transmission, is 28 quarts. The filter will take and additional pint. The manufacturer recommends that you do not over fill the transmission.
I suggest you check to see if the transmission fuild is low or take your car to the dealer to see if something is wrong with the cars wheels or the transmission.
No, it's just the case.
Dextron III
The automatic transmission uses ATF+4.
Allison Transynd