b85Fireman Posted March 26, 2006 Share Posted March 26, 2006 Which brand and weight gear oil is your top pick for transmission and rear end? Quote Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/ Share on other sites More sharing options...
Packer Posted March 27, 2006 Share Posted March 27, 2006 80w in the winter, 140w in the summer. Or 85/140 year 'round!If pulling toys around, I think I would stick with 80w-90.Here is a trick I picked up on in the mid 70's.Put in a couple of cans of STP in each gear box or transmission.By actual tests the STP will lower the transmission AND gears by 25 degs.If it's running cooler, it's got to be better on the gears and bearings.Now before I get some flack on STP, let me state that in an engine, it will last until it hits the luberfiner, and I have no use for it in the crankcase except to get a Cummins home with a pulled sleave.Try it , you might like it!!!Packer Quote Keep a clutchin' Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5084 Share on other sites More sharing options...
rsmartyn Posted March 27, 2006 Share Posted March 27, 2006 Hey Packer, Somebody told me that STP stands for screw the public, is that true? Bob Quote Ain't a Mack? Take it back! Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5090 Share on other sites More sharing options...
HK Trucking Posted March 27, 2006 Share Posted March 27, 2006 A good friend of mine always said STP stands for "Sweet Tasting P*ssy". Personally, I run the 80w 90 Bulldog gear lube in mine year round. If its good enough for factory fill, its good enough for me. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5091 Share on other sites More sharing options...
Packer Posted March 27, 2006 Share Posted March 27, 2006 Told you I was goin' catch hell about STP!!Packer Quote Keep a clutchin' Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5098 Share on other sites More sharing options...
MalibuJim Posted March 27, 2006 Share Posted March 27, 2006 I use Royal Purple synthetic in all of my cars/ and truck(engines/trans/and differentials. I will use it in the engine/transmission/differential of the B I'm restoring. Take a look at the website, ask fleet operators etc. but I think it's the best lube available. There have been fleet studies on Royal Purple use, "allegedly" better fuel milage, less failures etc.Here is the their site, http://www.longrider.com/ By the way, we don't sell or promote any oils/lubes here at P.A.I. This is strictly my opinion and a suggestion for those who may not have heard of this oil/lube company.Jim T. Quote Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5104 Share on other sites More sharing options...
Barry Posted March 27, 2006 Share Posted March 27, 2006 Anybody using Lucas Oil additives? Quote Barry - Watt's Truck Center Parts Manager and BMT Webmaster...1-888-304-MACK Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5106 Share on other sites More sharing options...
Freightrain Posted March 27, 2006 Share Posted March 27, 2006 I put some Lucas in my triplex. In hopes that it might quiet it down? Been in there 4 yrs now. 1/2 and 1/2 with some gear lube. I think it helped some...it really used to rattle hard after a long drive. Does make it a bit stiff on winter days...not that it happens very often. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5107 Share on other sites More sharing options...
MACKTRUCKS4 Posted March 28, 2006 Share Posted March 28, 2006 I've run Lucas in my v-8 since i rebuilt it, no problems, also run lucas fuel treatment in the winter and have not had a freeze up. I'm going to try the red and tacky grease on my machines next to see how it holds up under pressure and heat. Quote Live every day like it's your last, because one of these days, it will be. Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5117 Share on other sites More sharing options...
rsmartyn Posted March 28, 2006 Share Posted March 28, 2006 A good friend of mine always said STP stands for "Sweet Tasting P*ssy". Personally, I run the 80w 90 Bulldog gear lube in mine year round. If its good enough for factory fill, its good enough for me.Hi HK, I run the same 80w 90 as you in both trucks and have not had any problems. And Freight, I hope your triplex is okay, Macks have the quietest transmissions of any truck I've ever driven (hypoid gears I guess). Bob Quote Ain't a Mack? Take it back! Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5118 Share on other sites More sharing options...
Superdog Posted March 28, 2006 Share Posted March 28, 2006 Anybody using Lucas Oil additives?I've used Lucas oil additive in my F model,my Superliner,and now my CH.Don't know if it does any good or not,but it sure ain't done any harm either. Quote Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5123 Share on other sites More sharing options...
Freightrain Posted March 28, 2006 Share Posted March 28, 2006 I think mine is way beyond worn out? LOL!!Running down the road it's not bad, but let it pull against it down a long grade and it sounds pretty nasty...clunk'n and bang'n and rattl'n.Lucas kinda took up some of the slack...but it still rattles pretty bad after a long road trip(idle in neutral). It doesn't pop out of gears(except 2nd on coast side) but don't use it often enough to worry about it.Like to replace it...but just haven't got my hands on the right one yet. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5128 Share on other sites More sharing options...
b61fred Posted March 29, 2006 Share Posted March 29, 2006 This is going off of the subject some, but I have been told that Brown-lipe aux. trans take 50w engine oil, due to the needle bearings in the trans. I know that the Mack built trans are made together but I have seen a few Macks with the Aux trans (brownie). I want to make the b73 into a duplex with a brownie trans. I have seen one factory built b73 with 3 sticks before. I have also noticed that if I put the main box in 4the gear and the aux in neutral when I let the engine warm up that it is easier to shift. I guess it warms up the whole transmission that way. Fred Quote 15 gears...no waiting! Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5133 Share on other sites More sharing options...
Freightrain Posted March 29, 2006 Share Posted March 29, 2006 Yup, I leave my main in gear and it helps move the grease/paste around enough to make it easier to shift LOL!! Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/1003-gear-oil/#findComment-5147 Share on other sites More sharing options...
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