Rufino V Posted February 1, 2018 Share Posted February 1, 2018 Can someone tell me how to shift a Mack dump truck 1987 , it has 5 speed on the stick and on the knob has these letters “ D L N R “ I want to know the shirting pattern for this truck Quote Link to comment Share on other sites More sharing options...
hatcity Posted February 2, 2018 Share Posted February 2, 2018 Direct..low..neutral..reverse low is a vey low gear, use in 1st only direct is normal 1-5 AND you get 5 speeds in reverse in some applications, the main has to be in gear to run PTO, etc...that is why you can use the Neutral Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment Share on other sites More sharing options...
j hancock Posted February 2, 2018 Share Posted February 2, 2018 Sounds like you might have a T2080B. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
Rufino V Posted February 5, 2018 Author Share Posted February 5, 2018 If I want to upshifting from 2 L to 2D do I need to move the selector from L to D before bring the stick to neutral? Quote Link to comment Share on other sites More sharing options...
Rufino V Posted February 5, 2018 Author Share Posted February 5, 2018 Do you know any video where can I watch how to do the shifting, this is my first time driving a 1987 Mack truck Quote Link to comment Share on other sites More sharing options...
terry Posted February 5, 2018 Share Posted February 5, 2018 7 minutes ago, Rufino V said: Do you know any video where can I watch how to do the shifting, this is my first time driving a 1987 Mack truck look at the shift diagram, if your going to use every gear,1st low, 2nd low, 3rd low, 1st hi, 2 hi, 3hi, 4th hi, and 5th hi, you can skip some gears in low range, but you almost always need them all in high range, this trans is always used with a 300 hp engine that is a low lugging engine. terry Quote Link to comment Share on other sites More sharing options...
Rufino V Posted February 6, 2018 Author Share Posted February 6, 2018 The truck does not have any shift diagram Quote Link to comment Share on other sites More sharing options...
1965 Posted February 6, 2018 Share Posted February 6, 2018 19 minutes ago, Rufino V said: The truck does not have any shift diagram Scroll back up & you’ll find 1 Quote Link to comment Share on other sites More sharing options...
Rufino V Posted March 15, 2018 Author Share Posted March 15, 2018 The diagram is DIP LO N REV Quote Link to comment Share on other sites More sharing options...
bts-4120 Posted March 15, 2018 Share Posted March 15, 2018 low range on the trans was mostly for creeping off road and curb side pouring in a cement truck you'll need the top 5 every time but the bottom 3 depends what you doing with the truck bet its at least for 5.73 gears in it Quote Link to comment Share on other sites More sharing options...
Rufino V Posted March 15, 2018 Author Share Posted March 15, 2018 IS not like 1 L 1H 2L 2H 3L 3H 4L 4H 5L 5H ? Quote Link to comment Share on other sites More sharing options...
j hancock Posted March 15, 2018 Share Posted March 15, 2018 NO On 2/5/2018 at 11:41 AM, j hancock said: If you are running all the gears: Start out 1L, 2L, 3L, then preselect "D", then 1D (fourth), 2D (fifth), 3D (sixth), etc... Depending on conditions, you may not need to use one or more of the lower gears. The shift pattern is below. 1 Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
terry Posted March 15, 2018 Share Posted March 15, 2018 4 hours ago, Rufino V said: IS not like 1 L 1H 2L 2H 3L 3H 4L 4H 5L 5H ? You do not the hi-lo like a splitter. If off road used proper low range gear, when on pavement put range in direct and shift the main 1-2-3-4-5 in that order. terry Quote Link to comment Share on other sites More sharing options...
j hancock Posted March 16, 2018 Share Posted March 16, 2018 13 hours ago, terry said: You do not the hi-lo like a splitter. If off road used proper low range gear, when on pavement put range in direct and shift the main 1-2-3-4-5 in that order. terry In the 2080 operation guide, Mack recommends not starting out higher than 3L (6.63). The 5.24 ratio of 1H (fourth) is not practical to use for starting. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
terry Posted March 16, 2018 Share Posted March 16, 2018 8 hours ago, j hancock said: In the 2080 operation guide, Mack recommends not starting out higher than 3L (6.63). The 5.24 ratio of 1H (fourth) is not practical to use for starting. I have driven the 6'7and 8speed in these trans,1st hi is plenty low to start on. terry Quote Link to comment Share on other sites More sharing options...
Maxidyne Posted March 16, 2018 Share Posted March 16, 2018 That's been my experience too- 1st high usually works fine unless you're starting on a steep uphill with a load or in muck. Running light or empty you'll often find that 2nd high works fine. Quote Link to comment Share on other sites More sharing options...
Lmackattack Posted March 16, 2018 Share Posted March 16, 2018 If its the 8 speed I recall I mostly started a heavy load in 2nd/low then a quick flip it into hi as I move the stick back into 1st. I really disliked this trans because that when loaded you had to use the low side for at least 1 gear. starting out in 1st low and shifting up thru the gears was pointless. when empty I think I would just run 1-2-3-4-5 in hi. I liked the older 2 stick 6 speeds much better Quote Link to comment Share on other sites More sharing options...
mackr1989 Posted March 18, 2018 Share Posted March 18, 2018 probably a t2080 with a 300L. we had an 89 rd 690sx dump with that configuration. it topped out at 62 mph. it was geared so ridiculously low that you could start off in 5th gear while loaded. very slow truck with far to much space in high range gears being 5-6-7-8. first gear was useless as it barely got the truck moving. reverse was nice because you never had to feather the clutch. it has a unique shift pattern too. i used to start in 2nd and shift to 4th or 3rd and shift to 5th. the gears are way to close. i hated having the 300L and the mack 8 speed but i think it would be a great plow/sander configuration. i didn’t realize what i was buying. Quote Link to comment Share on other sites More sharing options...
Rufino V Posted March 21, 2018 Author Share Posted March 21, 2018 Any one know how many tons hold the 2 axel dump truck 1987 mack Quote Link to comment Share on other sites More sharing options...
Rufino V Posted April 16, 2018 Author Share Posted April 16, 2018 Where can I find the trnansmission model? Quote Link to comment Share on other sites More sharing options...
polracer01 Posted April 16, 2018 Share Posted April 16, 2018 Have mack dealer run the vin or should be an Id tag on tranny running the vin through mack will only tell you what it was originally if changed out will need to find the tag Quote Link to comment Share on other sites More sharing options...
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