A quick look at the Winnebago brochure for your coach shows it to have an Allison 3000MH transmission. Go to www.winnebagoind.com
, select Resources from the top tool bar, then select Product Information and enter the appropriate info.
It would be a good idea for you to crawl under the driver side with camera in hand and take a picture of the transmission ID label. Using the info from the ID plate go to the Allison web site and select My Transmission, enter the requested info and you will get all kinds of interesting information about your transmission.