mackr1989

no the clutch was adjusted at around 152k and still has the right amount of play in the pedal. the trans as well as the truck has 157k miles.

the truck does leak air but no where noticeable which tells me it could be coming from somewhere internally. air tank is always empty in the morning after being parked at night. air psi while driving is usually around 95-100. 157k miles on trans. not sure about the range split exhaust port? the trans does miss split engagements when shifted fast and grind. i guess the splitter and range selector does engage quickly when the truck is nit running and at full psi but maybe a slight delay..ill check on that. nit sure what you mean with your last question. several people are convinced its a synchro or snap ring but i think it is poor air pressure/dirty air lines or possibly synchro. by the way, the clutch is adjusted but doesnt mean it doesn’t have something to do wi5ht the issue.

2180 in 2000 rd688sx dump truck seems to be slipping when splitting gears from from underdrive to direct in high range while the truck is loaded. this doesnt happen in low range and doesnt happen when the truck is empty. if i shift from underdrive to direct while in high range and slowly lift my foot off of the fuel pedal while still keeping slight pressure, the transmission slides right into gear while splitting. prior to this happening, i could  split and fully and quickly take my foot off the throttle it shifted fine but now i have to baby it.

how are you guys splitting gears with mack 18 speeds? i have a 2180b in mine and some people have different ways of shifting these.

i do all of those things. i understand how to shift through the gears and the only gear that gives me trouble is usally only eighth while splitting. the other gears only make a real quick scratching type noise in between splits but it doesn’t always happen.

which will out perform the other, a mack tandem dump with a 400 18 speed..75mph truck or a pete tandem dump with a 500 cummins 6 speed allison that will do the same speed.

i was looking around at available used transmissions online and came across a link for mack transmissions that are supposedly rebuilt by this company? anyone on here ever deal with them? are they trustworthy?

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.

how much can any one of these scenarios cost to repair? i was expecting far worse cases and these possible issues dont seem to bad.

mack 18 speed in a 2000 rd with a 400 doesnt always fully engage when splitting between underdrive and direct. it will happen wether the transmission is in high or low range. when this occurs, it will seem to just neutralize and grind. what is going on?

we bought a 2000 rd with 58s last year and the frame had some scale between the rails. i started hitting the frame one day with a sledge to break some of it up and 1 foot hair line cracks started appearing. replaced the rails at donovan in nh for $11k. touch up paint hides a lot when youre selling something...

if i do have a boost leak, how is the problem fixed and is it expensive?

i need to convert my 12 24.5s to register my truck for 73k in mass. its a 2000 rd688sx randem dump. the tires i have now on the front axle are rated for less than the 18k front axle capacity and i want to convert to aluminum 22.5s with floatation tires. i want pics to see which tire size is both functional and looks best.

2000 rd's volt meter is pinned all the way to the right as soon as i turn the key to on and while truck is running. any ideas? bad ground? everything electronic works as it should.

the air build up rate in my truck takes a long time to reach 120. is it just time for a new compressor?

can i just replace the turbo and notice a difference?

can i get the same hp out of my 400 as a 427? of so, how?

my 2000 mack rd with a 400 18 speed has a pyrometer temp that is running between 600-900 degrees while accelerating. i put a thermometer gun to where the sensor is in the pipe and it was reading the same as the gauge in the cab. turbo temp was around 725 at the time that i pulled over to check when the pyrometer was reading around 850. the temperature quickly drops while i start slowing down or run the truck around 1300 rpms. gauge says to not exceed 1100 degrees. is my truck running hot? 

can anyone tell me how often to grease a 2000 rd688sx ten wheeler dump? 18 front 58 rears. how frequent and where exactly.

you guys are right about the tire size and camera angle but im also referring to the space between the top of the tires and the front fenders without looking like its leaning backwards. 

i love how this cab/hood sits on the frame. it makes the truck look so tall. how do you make it look like this?

2000 mack rd with 400 builds air slowly and it takes a lot longer than it normally would for the coolant to reach 180 degrees which is when i start using the engine brake, usually never lower than that. any ideas?

how do you mount the mini bulldogs on bumper poles?

where can you get chrome headlight bezels that fit around the headlights on a late model mack rd? ive seen them on these trucks but can not find them.

we have a 2000 mack rd and id like to change the bullet lights on top of the cab to led. can you do this and if so, which lights will fit? can i just get led cab lights that fit a granite and put them on this truck or is the fitment different?