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 Share on other sites More sharing options...
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