willtory Report post Posted October 5, 2017 Allison 3000 transmission in 2004 Itasca Meridian motor home with 114,572 miles shifting rough, shuddering during acceleration at 1400 RPM. Technician at transmission shop states there are no codes, and that verifies the electronics. States tranny must be torn down and overhauled. Transmission filters were changed annually, fluid (ATFIII) was changed at 20,000 miles or two years which ever came first (usually the calendar time). So, what causes a transmission to fail at this relatively low mileage? Share this post Link to post Share on other sites
wolfe10 Report post Posted October 5, 2017 RedT, Was this diagnosed by an authorized Allison dealership? If not, a second opinion by one is in order! And, with a 2004, really surprised you are not using Transynd. It is a LOT better fluid. Assume U-joints have been ruled out. Share this post Link to post Share on other sites
dreimink Report post Posted October 5, 2017 I would take a sample and have it analyzed. It might help by ruling out the fluid and help pinpoint the problem. Share this post Link to post Share on other sites
willtory Report post Posted October 6, 2017 I am the original owner, the transmission had ATFIII when delivered. It is at an Allison transmission shop. A sample won't tell much because to fluid (19 qt) and filters were changed two days ago. I will visit the shop to observe the teardown. Share this post Link to post Share on other sites
