Allison MT41 questions

[sopicki]

Hello Newellers, I'm still putting together information on our "new" 1972 Newell Coach. Since we got no documentation with the coach, I'm trying to find information on the transmission. The data plate indicates that we have an Allison MT41SP. This was installed in 1981 along with an 8.2L Detroit turbo diesel engine. I would like to find an operator manual for information on what type of fluid to use and how often to change it, recommended methods of shifting, max temp's and use of the retarder (I've never used one). I've looked to e-bay, books4cars, Allison's web-site and about 10 different ways of Google search's, but I haven't found any info on the MT41. I have found info on the MT640 and 650 and have discovered that they superseded the 40's and 41's but not being familiar with the 41's or the 650's I wouldn't know what to follow and what to dismiss. Any help is appreciated. Thanks!