Popular Post j hancock Posted July 9, 2019 Popular Post Share Posted July 9, 2019 Gorgeous Truck! 5 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/ Share on other sites More sharing options...
james j neiweem Posted July 9, 2019 Share Posted July 9, 2019 One of the best Macks ever made. A pullin beast. Quote Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427362 Share on other sites More sharing options...
HeavyGunner Posted July 9, 2019 Share Posted July 9, 2019 A 10 speed in a heavy haul truck seems a bit odd, but it’s certainly a beauty. Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427363 Share on other sites More sharing options...
j hancock Posted July 10, 2019 Author Share Posted July 10, 2019 9 hours ago, HeavyGunner said: A 10 speed in a heavy haul truck seems a bit odd, but it’s certainly a beauty. I was hoping to see what gear ratio was stamped on the carriers but I couldn't because of the fifth wheel plate and design of the rear fenders. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427412 Share on other sites More sharing options...
Truck Shop Posted July 10, 2019 Share Posted July 10, 2019 Nice tractor and nice sign art also. Quote One ping only Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427420 Share on other sites More sharing options...
JoeH Posted July 10, 2019 Share Posted July 10, 2019 endtB? What's the B stand for? I know DT is diesel, turbo, but what's the B? Quote Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427425 Share on other sites More sharing options...
ekennedy21 Posted July 10, 2019 Share Posted July 10, 2019 18 hours ago, HeavyGunner said: A 10 speed in a heavy haul truck seems a bit odd, but it’s certainly a beauty. Lou switched transmissions when he restored that truck. Quote Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427440 Share on other sites More sharing options...
JoeH Posted July 10, 2019 Share Posted July 10, 2019 8 hours ago, Rob said: Usually means "Dynatard" engine brake installed. Being that late however the analogy could have carried over to the Jacob's engine brake but I'm not sure there. It's a glider. The endt tip turbine motor wasn't used anymore in 88, they had gone to the E6 4valve. Forgot about the dynatard! Quote Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427441 Share on other sites More sharing options...
mackey58 Posted July 11, 2019 Share Posted July 11, 2019 Beautiful Quote Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427489 Share on other sites More sharing options...
mackey58 Posted July 13, 2019 Share Posted July 13, 2019 That's is a SWEET R I've seen it and the newer RD love em Quote Link to comment https://www.bigmacktrucks.com/topic/58047-1988-mack-rd-686sx-heavy-haul-tractor/#findComment-427663 Share on other sites More sharing options...
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