kevin mccune Posted February 2, 2007 Share Posted February 2, 2007 The six speed in the 86RD is mighty hard to shift on cold mornings- anybody have any sugestions on what weight oil to use & the capacity of the 6spd? Thanks Kevin Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/ Share on other sites More sharing options...
rick harper Posted February 2, 2007 Share Posted February 2, 2007 That transmission will take 80/90, capacity if I remember rights is around 34lbs. Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10219 Share on other sites More sharing options...
kevin mccune Posted February 2, 2007 Author Share Posted February 2, 2007 Thanks very much Rick-43lbs be close to 5gals?feels like 140W in there now-I'm assuming 75-90W WILL WORK -Thanks again -KevinSorry Rick got in a hurry & transposed the numbers on the capacity-34 lbs close to 4Gals,correct? Thanks Kevin Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10231 Share on other sites More sharing options...
mudslut28 Posted February 6, 2007 Share Posted February 6, 2007 Kevin...mine is pretty stiff on those 10 degree days but it has the 85w-140 in it..so Id say yours must also. 75w-90 should be fine as well. Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10283 Share on other sites More sharing options...
kevin mccune Posted February 6, 2007 Author Share Posted February 6, 2007 Thanks WV,have you or anybody ever seen a six speed torn out?I have never seen a transmission that could stand so much abuse.Now as an aside, I know some guys recommend 50W synthetic,but wouldn't that be a little thin in the summer months?Thanks-Kevin Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10290 Share on other sites More sharing options...
MACKS Posted February 7, 2007 Share Posted February 7, 2007 80-90 is your best bet for year round use ,it's what mack recomends. Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10299 Share on other sites More sharing options...
bulldogin Posted February 7, 2007 Share Posted February 7, 2007 is it a 6 speed low hole? (2 stick) or a 2060? Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10301 Share on other sites More sharing options...
kevin mccune Posted February 7, 2007 Author Share Posted February 7, 2007 2 stick- the other truck has the air shift button-Kevin Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10305 Share on other sites More sharing options...
mudslut28 Posted February 9, 2007 Share Posted February 9, 2007 Sure have Kevin I have 2 laying in the driveway that have seen better days..lol. The last one got so much wear on the countershaft bearings it started breaking teeth on the gears. I could tell some of the stuff I done to that thing but it would make me look bad an nobody would believe me anyways..lol. But I will say I ran it an entire shift squalling like a siren in 2002...it might have had a quart of oil in it. I filled it that evening after work and ended up running that tranny until early 05. They are an amazing piece. I dont think theres a gear in it with all its teeth intact and it hauled right up till I downed it to change it out. It held together long enough to carry me thru some very rough times.The other one was torn out by a rookie driver on a steep bank.....the only weak spot I have seen in them is 1st gear. You get one on a really steep bank and 2nd bogs out and you snatch 1st real quick and wheelie it...theres a good chance its gonna be a 5 speed afterwards..lol. Keep in mind this is probably grossing 110000-130000...so that lick would probably split the case on a Fuller..lol.Basically stupidity or stupidity is the only way to hurt one. I honestly think they'd run a month on swamp water for oil.Nothing like a Mack... Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10347 Share on other sites More sharing options...
kevin mccune Posted February 9, 2007 Author Share Posted February 9, 2007 Thanks WV,I've seen the abuse these things will stand too-Kevin Quote Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10357 Share on other sites More sharing options...
HK Trucking Posted February 9, 2007 Share Posted February 9, 2007 One thing that I've seen happen a number of times on the TRXL 107 or 1071 is that a tooth will come off one of the reverse idler gears, causing a banging noise when in reverse.It's usually caused by a driver trying to jam the compound in reverse while the truck is still moving, or without using the clutch brake.Other than that, I agree they're indestructible. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/2096-6-speed/#findComment-10358 Share on other sites More sharing options...
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