RyanL

well guys that fixed the problem, i hauled some topsoil today and it done good, it runs like a new truck almost,lol Thanks for the help from everybody.

thanks for the specs, but i dn't have the tools i need yet to do all that, so i bit the bullet and took it to a local truck shop, after i done had it all tore apart. they charge a flat rate of 6hrs @ $65.00 hr ouch. but they goin complete thru and check all and put together, with used parts when possible at my request. They jus called me today and said it was dne and cost $1200.00. WOW! i wish i had tools to done it myself,lol So i will get it picked up and back in truck first of the week. Man, i kinda wish i would have listened to everybody tellin me that it ain't worth ownin your own truck,lol everythng i do to this truck cost me a fortune, and now i got a pretty much new truck with more money in it than i'll ever get out of it. And me being young, insurance and plates kill me, and i dn't even use truck for anything other than farm stuff pretty much. Sorry bout long post bout nothing,lol

well i counted bull gears thru plug and they are the same. so i will get me another ring and pinion sometime this wk, and another inner cam and stuff for power divider, cuz i chewed the one i just put in up. does anyone know what the backlash is suppose to be for these or any other things i should know when putting back together.

k thats what i was wandering if they would be different too. ill count to nite

i'll get a different pinion gear and change it out and hope that fixes it. ive basically got a new truck now and lots of experience and lessons learned,lol Thanks for all the help guys. I'll will post a update towards end of week, on whether it fixes it or not.

that story i was talkin about if you are interested in readin it go to google and search for mack r-model odd story, its the one on heavyequipmentforums.com

well guys i just confirmed my findings there is one tooth difference between front and rear pinion gears. i didn't pull carriers out and check bull gears, would they be different too? the way the truck acts, i don't think there is much more than a tooth difference. I also found a similar story like this on web somewhere.

well i just went out and took side cover off and counted teeth on ring and pinion to start with. The rear axle has 17 on ring and 13 on pinion. ( i counted these a few wks ago when i had it out) Now for the front it has 17 on ring and 14 on pinion. Now this sounds like its the problem cuz it acted like at ratio problem all along, and got worse when i put new guts in power divider. But i want to take rear cover back off and recount teeth jus to make sure, but key got left on and batterys r dead so i can't get bed high enuff yet to check them, but will in a few hopefully. So are the ring and pinion gears sumthing they change ratio's with these trucks or just the bull gears? dumb question i know, sorry im young and learnin.

hey, sorry guys bout not gettin back to ya. We been workin 7 days a wk which is 66hrs at my day job, and then i been comin home and runnin trackhoe til 10pm tryin to get a new building site done and old barn cleaned up and what not, so i haven't had chance to lk at ol mack, and tryed to do it 2nite but had company and didn't get nothin done but B.S.ing But the plan is check ratio's. Sorry bout the wait and ill try to figure sumthin out in next day or two. Thanks to everybody who has offered suggestions, and help thus far.

Well im going to count teeth here in next day or two when i get a chance to pull it back out. i didn't see any signs of wheel slippage. As far a power divder, its just got new wedges and inner cams and what not, that was first thing i changed. im goin to do sum checkin on torque rods, sinse these was just replaced and modified to fit. I heard just the slighest difference from factory will cause problems.

i checked top gear sets when i pulled carriers out cuz ya have to remove covers to get two of the bolts. I'm stumped, i thnk the next step is to pull frnt carrier back out and count all teeth. it has dayton whls all around. and i will go double check and make sure all are tight.

yeah there is and yeah it seemed to be ok to me when i changed trans

well, i took trk for another ride to gather some more info, this time as a passenger. The noise resembles the noise a hammer makes when hitting driveshaft tube (kinda hollow, tin can soundin, kinda noise) but it makes the truck do some fierce jerking. it don't do it goin doin hill in gear with or without jake on, and it dn't do it coasting in neutral. it only does it when in gear (any gear) while appling throttle or load and it seems to be worst when (as far as jerking more so than noise) while just maintaining speed. and it sometimes will be fine and not make noise or anthing at all. i can't pin point source of noise even standing out on fuel tank. I checked all tires and all seems well. i also don't thnk any bearings are bad. i checked all u-joints driveshafts and all are in phase and what not. I was told the other day that sometimes torque arms being to long or short will throw driveline angles out enuff to cause problems?? We did replace torque arms with other new ones we found and cut on and welded it back together with a heavy sleeve over it, but i wasn't there when this was done so i dn't know how close in length these new ones was. Sorry bout long post

thanks for all the replys. Im just at a loss on what to do or where to look. i guess im young and this is my first mack so im kinda learnin as i go. But when i traded for this truck it had 10 and 11R tires mixed up on rear. which is probaly why the spider gears was busted out. I drove the truck around a lil bit just as a tractor and never noticed and popping or anything. I then took trk to unkle's welding shop and we doubled frame and stuck a 14' steel dump with subframe on the truck. and at this same time i put all new 11R22.5 recaps on rear and virgin 11R22.5 on front, and drove trk home and this is when the popping first started, but this was before in knew bout broken spiders. I have put prob close to 200-300 miles on trk like that, it jus embarrassing and noisey and jerky somtimes. then jus the other day i replaces trans with a used one, and rebuilt spiders in front and rear, and put new inner cam and wedge in power divider. So i dn't know if any of this helps.

well i checked all rear tires and all seem to be same hieght. So i took the trk for a drive and got on a backroad and started up the grade, and it was popping/banging so i mashed throttle down and it became qiuet? and as soon as i let off it again it started popping. i checked rearends and nothing seems to be warmer than normal other than maybe power divder(which is where id say im getting the popping from). So i stopped and backed up and pulled ahead a few times and drove another 2 miles or so back home while jus taking it easy and shiftin at low RPM and stuff and it never maid a noise SO??? i don't know but im goin to go with very close but mismatced gear ratio's, and bite the bullet and pull the front carrier back out and count teeth, which i forgot to do when i just changed spider gears the other nite at about midnite,lol