superliner237 Posted November 16, 2014 Share Posted November 16, 2014 Was talking to a guy today about different trucks and stuff and the topic of transmissions came up. He told me that when the first 550 cats, not a clue about time frame here, 80s, 90s,....70s??? that eaton fuller didn't make a trans. rated for the torque of that motor yet. He was told that a limited number of trucks, Pete, Kenworth came out with Mack 18 speeds in them. I've never heard tales of this, and I don't want to be the only one out here with this buggin me. Guy's a pretty straight up person so I really don't think he's pullin' my chain. Bad info to him?? Beats me. Just had some time, thought I'd throw it out there. Quote Link to comment https://www.bigmacktrucks.com/topic/37750-mack-18-speed-in-paccars/ Share on other sites More sharing options...
rsb502 Posted November 16, 2014 Share Posted November 16, 2014 I've never heard of a Mack trans in a paccar but crazier things have happened, the first Cat 550's would have been 3406E models in the mid to late 90's The Cat 550's use an Eaton 18918 or other 18 series transmission, the 600 and 625 use the 20918 its got a bigger input shaft. 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 https://www.bigmacktrucks.com/topic/37750-mack-18-speed-in-paccars/#findComment-266907 Share on other sites More sharing options...
slpwlker Posted November 16, 2014 Share Posted November 16, 2014 I had an RTLO20918B in my Pete. The low end was low and the top end was awsome. great splits in between. I mean 84 Superdog ate me alive but he was bobtail. Quote Link to comment https://www.bigmacktrucks.com/topic/37750-mack-18-speed-in-paccars/#findComment-266914 Share on other sites More sharing options...
rsb502 Posted November 20, 2014 Share Posted November 20, 2014 Too bad we cant try again! 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 https://www.bigmacktrucks.com/topic/37750-mack-18-speed-in-paccars/#findComment-267338 Share on other sites More sharing options...
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