stev Posted August 12, 2011 Share Posted August 12, 2011 this is a video of a truck for sale north of me: the driver seems to keep revving the engine while driving it forward, and it really seems to be running fast while he is backing it up.is there something wrong with the engine? i suppose it might be that it just isn't warmed up, but something just doesn't seem right, and i can't figure out what it is . . . . .thanx . . . . . . Quote Link to comment https://www.bigmacktrucks.com/topic/20151-video-of-r686st-for-sale/ Share on other sites More sharing options...
mowerman Posted August 12, 2011 Share Posted August 12, 2011 this is a video of a truck for sale north of me: the driver seems to keep revving the engine while driving it forward, and it really seems to be running fast while he is backing it up.is there something wrong with the engine? i suppose it might be that it just isn't warmed up, but something just doesn't seem right, and i can't figure out what it is . . . . .thanx . . . . . .ya,,,specially in reverse,,its sounds like a 5.and 4 in lolo reverse.bob Quote Link to comment https://www.bigmacktrucks.com/topic/20151-video-of-r686st-for-sale/#findComment-83560 Share on other sites More sharing options...
Lmackattack Posted August 15, 2011 Share Posted August 15, 2011 He was just in a higher gear than he needed to be when driving in the lot. You hear the govenor trying to compensate for the low rpms. Backing up he is just in a low gear..sounds normal to me.. Quote Link to comment https://www.bigmacktrucks.com/topic/20151-video-of-r686st-for-sale/#findComment-83762 Share on other sites More sharing options...
hatcity Posted August 15, 2011 Share Posted August 15, 2011 He was just in a higher gear than he needed to be when driving in the lot. You hear the govenor trying to compensate for the low rpms. Backing up he is just in a low gear..sounds normal to me..yup Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/20151-video-of-r686st-for-sale/#findComment-83764 Share on other sites More sharing options...
slpwlker Posted August 15, 2011 Share Posted August 15, 2011 Sounds like every Mack I grew up around Quote Link to comment https://www.bigmacktrucks.com/topic/20151-video-of-r686st-for-sale/#findComment-83765 Share on other sites More sharing options...
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