fastboater Posted October 4, 2015 Share Posted October 4, 2015 While hauling grain this harvest the engine in the one of my R686ST gave up the ghost. Rod made a fist size hole in block.I need some help or advise or leads on a reman E6 300 or 350.The truck has a 5 speed trans.has anyone had experience putting a 350hp in a 5 speed?Any help would be greatThanks Lee Anderson317-490-6121 Quote Link to comment https://www.bigmacktrucks.com/topic/42054-r686st-engine-carnage/ Share on other sites More sharing options...
Lmackattack Posted October 5, 2015 Share Posted October 5, 2015 The 350s needed more than 5 gears to keep them in the power band. I think minimum was a 7 speed.You could however have the pump set to a maxidyne 300 spec and it would be fine. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/42054-r686st-engine-carnage/#findComment-306234 Share on other sites More sharing options...
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