scott Posted November 12, 2006 Share Posted November 12, 2006 book say's straight mineral, or is there something newer and better? scott Quote Link to comment Share on other sites More sharing options...
chris88 Posted November 13, 2006 Share Posted November 13, 2006 50w synthetic, a little pricey but its what is run in all trans now Quote Link to comment Share on other sites More sharing options...
HK Trucking Posted November 13, 2006 Share Posted November 13, 2006 book say's straight mineral, or is there something newer and better? scotthttp://bigmacktrucks.invisionzone.com/inde...?showtopic=1003Bulldog gear lube available at your nearest Mack dealer. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment Share on other sites More sharing options...
Freightrain Posted November 15, 2006 Share Posted November 15, 2006 With all this talk about boxes, I'm starting to wonder what I put in mine like 5 yrs ago. I know I put 2 gals of Lucas additive to help with the rattl'n noise, but not sure what actual fluid I used? Might have been 75w gear lube? Can't recall now. Guess it don't really matter since I've put 20K+ miles on it with no issues(don't even really leak-just grumbles bad when hot). Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
theakerstwo Posted November 15, 2006 Share Posted November 15, 2006 With all this talk about boxes, I'm starting to wonder what I put in mine like 5 yrs ago. I know I put 2 gals of Lucas additive to help with the rattl'n noise, but not sure what actual fluid I used? Might have been 75w gear lube? Can't recall now. Guess it don't really matter since I've put 20K+ miles on it with no issues(don't even really leak-just grumbles bad when hot).The counter shaft end play may need to bo set.Too end play will mame them noisey. Quote glenn akers Link to comment Share on other sites More sharing options...
theakerstwo Posted November 16, 2006 Share Posted November 16, 2006 The counter shaft end play may need to bo set.Too end play will mame them noisey.I will try this again the countershaft end play may be too much that will cause a noiseYou have front and rear counter shaft and the end play gets too much with wear on bearing and can hurt the hard to find gears. Quote glenn akers Link to comment Share on other sites More sharing options...
Freightrain Posted November 16, 2006 Share Posted November 16, 2006 It shifts nice overall, no issues there, but when hot and idling in neutral it sounds like a bunch of rocks bang'n around in it.They say with the wrong oil in it, it will not get proper lubrication. Well, I think it definitely hasn't hurt mine since it was so worn out to begin with! Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
ThaddeusW Posted November 17, 2006 Share Posted November 17, 2006 It shifts nice overall, no issues there, but when hot and idling in neutral it sounds like a bunch of rocks bang'n around in it.They say with the wrong oil in it, it will not get proper lubrication. Well, I think it definitely hasn't hurt mine since it was so worn out to begin with!Just a thought:If you think about it if there is play in the shaft it will be more pronounced during idle in neutral. When things get hot they expand and your poor adjustment will go out even more as it expands. Also when in gear the forces against the shaft wont allow it to rattle all over. It might move around but not rattle as the friction between the gears will hold the shaft steady. Thats why its mighty difficult to pull a gear out when your foots on the go pedal. Quote -Thad What America needs is less bull and more Bulldog! Link to comment Share on other sites More sharing options...
Freightrain Posted November 17, 2006 Share Posted November 17, 2006 Definitely.Sometimes I can leave one box in gear, which puts enough load on it to keep it somewhat quieter.You can't pull one out of gear with any load on it for the most part, unless the gear teeth itself is worn bad enough to allow it. The torque holds it tight. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
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