bgblk1968 Posted yesterday at 02:20 PM Share Posted yesterday at 02:20 PM 2011 MP7 with Eaton Autoshift engine went bad. Trying to put MP7 out of 2015 that had a MDrive in. The flywheel interchanges but will not let transmission go all the way in. Likes about an inch before going flush. Seems like pilot bearing is not deep enough in flywheel. Do mdrive and Eaton use same gear housing? What am I not seeing? Quote Link to comment https://www.bigmacktrucks.com/topic/75626-mp7-flywheel-problems/ Share on other sites More sharing options...
fjh Posted yesterday at 04:39 PM Share Posted yesterday at 04:39 PM 2 hours ago, bgblk1968 said: 2011 MP7 with Eaton Autoshift engine went bad. Trying to put MP7 out of 2015 that had a MDrive in. The flywheel interchanges but will not let transmission go all the way in. Likes about an inch before going flush. Seems like pilot bearing is not deep enough in flywheel. Do mdrive and Eaton use same gear housing? What am I not seeing? Another project for the Heinz me thinks? Maybe post the vins from both trucks and see if he can cross reference the engine housing s ! Quote Link to comment https://www.bigmacktrucks.com/topic/75626-mp7-flywheel-problems/#findComment-577063 Share on other sites More sharing options...
The Heinz Posted yesterday at 04:52 PM Share Posted yesterday at 04:52 PM If I had the VIN's I can cross them no problem. Just had the same issue with a customer's truck that had rolled over a while back, so they installed an engine and cab from a different truck, leading to us ordering the wrong flywheel for the engine, and then the correct one was wrong for the Allison in the chassis, because the engine was specced with a Maxitorque! We had to chop the ears off the Allison to fit it, voiding warranty with customer's approval of course (they did the same when piecing this Frankenmess together). 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75626-mp7-flywheel-problems/#findComment-577064 Share on other sites More sharing options...
bgblk1968 Posted 23 hours ago Author Share Posted 23 hours ago Engine is out of 1m1aw02y0gm052852(MP7 with Mdrive) Wanting to put in 1m1aw02y3bm015299(MP7 with Eaton Autoshift) Both CXU613's Quote Link to comment https://www.bigmacktrucks.com/topic/75626-mp7-flywheel-problems/#findComment-577068 Share on other sites More sharing options...
Popular Post The Heinz Posted 22 hours ago Popular Post Share Posted 22 hours ago (edited) The flywheel housings are different, the mDrive flywheel housing is 23030729, which is luckily available to order from Mack. The engine blocks are the exact same, as are the timing gear plates and covers, so I don't see why you wouldn't be able to swap flywheel housings. Edited 22 hours ago by The Heinz It's Friday Eve 3 Quote Link to comment https://www.bigmacktrucks.com/topic/75626-mp7-flywheel-problems/#findComment-577071 Share on other sites More sharing options...
fjh Posted 18 hours ago Share Posted 18 hours ago Heinz to the rescue!👊 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75626-mp7-flywheel-problems/#findComment-577079 Share on other sites More sharing options...
The Heinz Posted 4 hours ago Share Posted 4 hours ago It also just occurred to me that you'll want to swap flywheels and pilot bearings, but I think you already knew that anyways. Early morning fog, just wanted to make sure you don't do extra work because of me! The pilot bearing for the Eaton Autoshift is 20512915. Quote Link to comment https://www.bigmacktrucks.com/topic/75626-mp7-flywheel-problems/#findComment-577096 Share on other sites More sharing options...
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