rich Posted February 26, 2010 Share Posted February 26, 2010 I am replacing a 1070b 12 speed cause the damn thing broke. A while ago i bought this superliner that had a 12 speed and the 2 low hole speeds would not work. After some research and investigation I realized the lock out had broke in half. Though i tried to retrieve the broken parts all i got out was a couple small chunks. Getting back to when i bought this truck the tranny locked up because it was in 2 gears at once. I was able to pop off the shift tower and line the slides up and go on my merry way. After thinking about it i am sure one of the chuncks was the culprit and then finally fell to the bottom. Then after a while reverse was becoming a problem engaging and the nuetral for the pto was a problem. Then the other day I put a little strain on the drive train and snap goes the tranny. No reverse no pto no nuttin. Towed it to the shop and decieded to find a good take out with a garrentee and found one for a $1000.00 could not pass it up. I will pick it up tomorrow and do the swap. I am praying to the MACK gods that i am getting a good tranny. We split it and everything looks good Quote Link to comment https://www.bigmacktrucks.com/topic/12800-r-r-12-speed/ Share on other sites More sharing options...
Rob Posted February 26, 2010 Share Posted February 26, 2010 I am replacing a 1070b 12 speed cause the damn thing broke. A while ago i bought this superliner that had a 12 speed and the 2 low hole speeds would not work. After some research and investigation I realized the lock out had broke in half. Though i tried to retrieve the broken parts all i got out was a couple small chunks. Getting back to when i bought this truck the tranny locked up because it was in 2 gears at once. I was able to pop off the shift tower and line the slides up and go on my merry way. After thinking about it i am sure one of the chuncks was the culprit and then finally fell to the bottom. Then after a while reverse was becoming a problem engaging and the nuetral for the pto was a problem. Then the other day I put a little strain on the drive train and snap goes the tranny. No reverse no pto no nuttin. Towed it to the shop and decieded to find a good take out with a garrentee and found one for a $1000.00 could not pass it up. I will pick it up tomorrow and do the swap. I am praying to the MACK gods that i am getting a good tranny. We split it and everything looks goodWhat are your plans for the busted one? I have a 1070b that has problems also and would like to have another for spare parts as that damned thing is expensive to repair!!Thanks,Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/12800-r-r-12-speed/#findComment-50254 Share on other sites More sharing options...
rich Posted February 26, 2010 Author Share Posted February 26, 2010 What are your plans for the busted one? I have a 1070b that has problems also and would like to have another for spare parts as that damned thing is expensive to repair!!Thanks,RobI am going to find the problem then go from there. I think it has a broken main shaft Quote Link to comment https://www.bigmacktrucks.com/topic/12800-r-r-12-speed/#findComment-50256 Share on other sites More sharing options...
rich Posted February 26, 2010 Author Share Posted February 26, 2010 I am going to find the problem then go from there. I think it has a broken main shaftRobWhen i find out i will post it up.Buddy Quote Link to comment https://www.bigmacktrucks.com/topic/12800-r-r-12-speed/#findComment-50258 Share on other sites More sharing options...
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