Popular Post Gravel Kid 5 Posted January 18 Popular Post Share Posted January 18 Hey all you truckers! New O/O here going into business fairly soon here, I've just bought a 77 R686 with an E6-350 and a T1070 6 speed that I'm putting back together. I guess these trucks came from a company out of Bremerton WA that used to pull pup trailers behind them, truck was last registered about 15 years ago. I do see a few Mack's out here in western WA that have the same paint scheme with the spade on the front that are still running! I'm very curious to hear stories from anyone that may know of the company that originally owned these trucks; what it was like pulling a pup with these trucks (I understand that it was probably pretty slow!) and any notable experiences in these trucks? Anyone else currently/previously haul 90k+ GVW loads with setups like this? I'm thinking it will be pretty interesting to drive with a load on compared to the RD I drive at my current work, with an 18 and an E7-460... 3 1 Quote Link to post Share on other sites
terry 528 Posted January 18 Share Posted January 18 very trouble free set up, but not a good transmission for a pup, to wide of gear ratios. but they were used for alot of years. terry 1 Quote Link to post Share on other sites
storkmack 747 Posted January 18 Share Posted January 18 We ran them in semis grossing 80-85k depending on how you got loaded. Let the Maxidyne do it’s thing and lug is down into it’s sweet spot with the torque. If you think you have to keep the R’s up all the time you will always be tach’ed out. Those guys with the bigger power and more gears may be ahead of you, but I really doubt they will get an extra load on you at the end of the day. 2 Quote Link to post Share on other sites
mackey58 534 Posted January 18 Share Posted January 18 So true mr storkman.i run that 90RD690s all day EM6 300L .let it fo its thing.that extra load wont finish the job. Quote Link to post Share on other sites
storkmack 747 Posted January 18 Share Posted January 18 I have been having this discussion with a friend. He has a 94 RB mechanical E7 300 that’s cranked up and a 2060 trans. Just thinks it’s a pooch cuz the large cats pull away at 50mph. He wanted to change all kinds of shit thinking he was gonna go faster. All I said was “boy you like shift gears and lose money”. Quote Link to post Share on other sites
mackey58 534 Posted January 19 Share Posted January 19 The RD has a 7 speed.let em pull away. Watch the fuel gauge move.that em6 moves along .a little slow but I ain't shifting that much.lol.slow and steady wind the racelol Quote Link to post Share on other sites
mackey58 534 Posted January 19 Share Posted January 19 What would they do in a 237 with a 2 stick 6 moving heavy equipment with a mechanical detatch talbert lowboy Quote Link to post Share on other sites
Joey Mack 231 Posted January 19 Share Posted January 19 In '99, I drove for a construction co. in Maine for only 2 years,, But I drove '77-'97 Mack's... My favorite was the '79 long framed RD tractor, with a tri-axle framed dump... That tranny was so versitile, and multi-speed reverse was very cool for backing on svc roads around the job site.. I also drove the X-107 twin stick.. another multi speed reverse tranny in a tri-axle dump truck.. I learned to respect that tranny... after that --- no more stopping in the middle of the intersection, to start over.. Bullet proof and proven.... It may be slow, but it will Pull!!.. jojo.. 1 Quote Link to post Share on other sites
terry 528 Posted January 19 Share Posted January 19 As far as i am concerned the best trans mack ever built was the overdrive 12 spd, i put one in a DM with 4.17 rears, best combo ever, and it was a runner too. terry 1 Quote Link to post Share on other sites
storkmack 747 Posted January 19 Share Posted January 19 I have that set up in an 85’ R model E6 350,12 sp and 4:17 rears. She’s a puller for sure. 1 Quote Link to post Share on other sites
mackey58 534 Posted January 19 Share Posted January 19 Ya need a driver,lol that's a sweet combos is that the white one i.saw one day Quote Link to post Share on other sites
storkmack 747 Posted January 19 Share Posted January 19 Haven’t plated it in a few years. 2 Quote Link to post Share on other sites
mackey58 534 Posted January 19 Share Posted January 19 Ya need a driver,lol that's a sweet combos is that the white one i.saw one day Quote Link to post Share on other sites
mackey58 534 Posted January 19 Share Posted January 19 That's nice Quote Link to post Share on other sites
Joey Mack 231 Posted January 19 Share Posted January 19 Hell Yeah!!!!!!!!! Great post's.. It brings me back...... The 12 spd. I drove was in a 78 RD tractor. The deep reduction switch was up in the dash... Looking back. That was a real Mack, I would love to have one... Jojo 1 Quote Link to post Share on other sites
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