JohnandKris Report post Posted October 11, 2009 Have a new 2008 Coach House 232XL on a 2007 Ford E450 Super Duty Frame with 6.8-literTriton V-10 engine. We have installed a Scan gague and want to monitor the temperature range on the transmission. What is the safe temperature range for the transmission fluid (appoximate GVWR 13,000 range) when: 1) fairly level roads, 2) hills? Thanks. John Burke Aiken Share this post Link to post Share on other sites
tbutler Report post Posted October 12, 2009 I would check with your transmission manufacturer's data on the transmission. The safe temperatures should be specified for your transmission. They will be a range of temperatures. With fairly level roads, temperatures should be near the middle of the range, with hills slightly higher. When you get to the mountains look for the temperatures to be nearer the high end of the safe range. Safe temperature ranges (probably referred to as normal temperatures) for the transmission are independent of the road conditions and load. The equipment is designed to operate within a specific temperature range and anything outside this temperature range may damage the transmission. Share this post Link to post Share on other sites
wolfe10 Report post Posted October 12, 2009 I would check with your transmission manufacturer's data on the transmission. The safe temperatures should be specified for your transmission. They will be a range of temperatures. With fairly level roads, temperatures should be near the middle of the range, with hills slightly higher. When you get to the mountains look for the temperatures to be nearer the high end of the safe range. Safe temperature ranges (probably referred to as normal temperatures) for the transmission are independent of the road conditions and load. The equipment is designed to operate within a specific temperature range and anything outside this temperature range may damage the transmission. As Tom said, this is highly dependent on what transmission you have. Some transmissions (like Allison 1000, 2000, 3000 and 4000 series) lock their torque converter in 2,3,4,5 and 6th gear, even at full throttle. Others unlock the torque converter under high load conditions which materially adds to the heat load. And some older transmissions don't even have locking converters. Using synthetic fluid (such as Allison Transynd) ups the safe temperature range of the fluid. DO as Tom suggests and get information that pertains to YOUR transmission. Brett Wolfe Share this post Link to post Share on other sites
