joes mack Posted October 5, 2013 Share Posted October 5, 2013 im getting ready to do some servicing on the cf and I was told that the trans fluid for the Allison trans is a special type. is this true and if so what type does it take. thanks joe Quote Link to comment Share on other sites More sharing options...
BOB DINGSDALE Posted October 5, 2013 Share Posted October 5, 2013 In the big 6061 and 5960 models we used ATF,15-40,hydraulic fluid,and didn't have any problems with either of the oils.this was in west coast of canada logging trucks.100 tons plus loads. Quote Link to comment Share on other sites More sharing options...
BC Mack Posted October 6, 2013 Share Posted October 6, 2013 If you are finding the oil is getting black and a burnt smell you may be overheating it... a nice, but expensive, upgrade is to Transynd... anything with a retarder needs it. Commonly used in transit buses... but it is expensive!!!.otherwise... just what Bob said... ATF from a reliable supplier.BC Mack Quote Link to comment Share on other sites More sharing options...
joes mack Posted October 6, 2013 Author Share Posted October 6, 2013 it has some kind of red oil in it right now I was kind of thinking it might be dextron 3 or something like that. the oil smells fine and its not black or anything I was just going to change it to keep it on the time schedule it has been on Quote Link to comment Share on other sites More sharing options...
Joseph Moody Jr Posted October 6, 2013 Share Posted October 6, 2013 The government agency I drive for have all way use Allison Transmission for fleet. We have two types of transmission. One type for older models and newer type for newer type. I think the brand name on newer fluid is made by Castrol and it Transynd RD. My suggest is to Allison web site to get correct type. Quote Link to comment Share on other sites More sharing options...
1958 F.W.D. Posted October 6, 2013 Share Posted October 6, 2013 If it's an HT740 (which is very well probably is) standard ATF works. We use Wolf's Head HD Dexron III. Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment Share on other sites More sharing options...
rsb502 Posted October 6, 2013 Share Posted October 6, 2013 In any of the newer electronic 2000,3000 and 4000 series we used allison transynd, in the older MT643 transmissions we used dexron 3 or above and it was covered by Allison and Weller Reman warranties. I think the transynd runs cooler than the dexron and it definitely stays cleaner, its full synthetic fluid so its probalby best, you can tell a big difference in the cleanliness when changing filters going from Dexron 3 to Transynd. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment Share on other sites More sharing options...
dreese Posted October 6, 2013 Share Posted October 6, 2013 They get Transynd before the trucks come off the line at Macungie. Quote Link to comment Share on other sites More sharing options...
Baxter Posted October 6, 2013 Share Posted October 6, 2013 Transynd recommended Quote Link to comment Share on other sites More sharing options...
farmer52 Posted October 7, 2013 Share Posted October 7, 2013 Transynd recommendedX2. Allison is very specific about the fluid. The company I worked for was developing a common fluid for all TQ automatics but Allison was very much against it. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment Share on other sites More sharing options...
joes mack Posted October 8, 2013 Author Share Posted October 8, 2013 the transmission is a 740 and thanks for all of the information you all have gave Quote Link to comment Share on other sites More sharing options...
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