03' Big Red Posted February 5, 2020 Share Posted February 5, 2020 hey gang, i am looking to purchase another truck . it is a 1992 DM that has a EM 7 300,Eaton 8LL and 5.73 axle ratio, i thought EM 7's are governed at 1750 rpm, the seller states peak torque is around 1700 rpm and it will pull up to 2100. am i wrong ? Quote Link to comment https://www.bigmacktrucks.com/topic/60850-1992-em-7-info-needed/ Share on other sites More sharing options...
terry Posted February 5, 2020 Share Posted February 5, 2020 Kind of a deep rear ratio for a 8LL transmission. terry Quote Link to comment https://www.bigmacktrucks.com/topic/60850-1992-em-7-info-needed/#findComment-442015 Share on other sites More sharing options...
03' Big Red Posted February 5, 2020 Author Share Posted February 5, 2020 that's my thought especially if its governed at 1750 Quote Link to comment https://www.bigmacktrucks.com/topic/60850-1992-em-7-info-needed/#findComment-442016 Share on other sites More sharing options...
880joe Posted February 5, 2020 Share Posted February 5, 2020 I thought peak torque was around 1100 rpm on those. Probably came out with a 5,6,7,or 8 speed mack transmission when new Quote Link to comment https://www.bigmacktrucks.com/topic/60850-1992-em-7-info-needed/#findComment-442024 Share on other sites More sharing options...
terry Posted February 5, 2020 Share Posted February 5, 2020 1 hour ago, 880joe said: I thought peak torque was around 1100 rpm on those. Probably came out with a 5,6,7,or 8 speed mack transmission when new I think it has to have an L in the engine designation to be that low torque engine. terry Quote Link to comment https://www.bigmacktrucks.com/topic/60850-1992-em-7-info-needed/#findComment-442033 Share on other sites More sharing options...
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