rcvdairy Posted June 16, 2014 Share Posted June 16, 2014 Hello I have a mh613 with trtxl1070b 12spd, snapped 2nd/3rd gear shift rail. split the back third of the tranny off to get broken rail out but cant figure out how to put back together with all the shift forks in place, Im thinkin theres a certain order or trick to make it work but cant get it figured out.. any help would be greatly appreciated thanks Quote Link to comment https://www.bigmacktrucks.com/topic/36067-12spd-maxitorque-problems/ Share on other sites More sharing options...
mrsmackpaul Posted June 16, 2014 Share Posted June 16, 2014 Is it still standing up on its bell housing if not it may need to be Paul Quote Link to comment https://www.bigmacktrucks.com/topic/36067-12spd-maxitorque-problems/#findComment-249443 Share on other sites More sharing options...
ws721 Posted June 16, 2014 Share Posted June 16, 2014 That's what I did with my 6 spd. Stood it on its bellhousing. Also, Some of the forks have to be held in place with wire, coathanger while linging the fork shafts up to put back together. Good luck, hope it goes well for you Quote Remember if it's got a hood it's no good! Link to comment https://www.bigmacktrucks.com/topic/36067-12spd-maxitorque-problems/#findComment-249450 Share on other sites More sharing options...
rcvdairy Posted June 16, 2014 Author Share Posted June 16, 2014 thanks for the replies! since my trucks a cab over I split it while in the truck so cant really stand it on bell housing. theres 2 plugs on back of tranny that look like there made to have shift rails slide out but the one for 2nd and 3rd shift rail is not big enough because the shaft tapers up to 7/8 for a few inches and whole at back of tranny is only 3/4s. 4th and 5th is easy because I can slide rail in from back while lining up the forks but ya I don't know how ur supposed to do 2nd/3rd one if I cant slide it in from back ounce I have the case already together. it was easy to take out cuase that shaft was snapped in two places so I never seen how its supposed to come out normally Quote Link to comment https://www.bigmacktrucks.com/topic/36067-12spd-maxitorque-problems/#findComment-249475 Share on other sites More sharing options...
mrsmackpaul Posted June 17, 2014 Share Posted June 17, 2014 it might have to go out the deep reduction end ? its been a while since I've had mine apart and I was taught you cant split the trans on the truck should be pulled out and stood up on its bell housing I have never had to force these gear boxes apart to work on them it it dosnt come apart or together easy somethings wrong well that was the way I was taught mind you I was not trained by Mack just another bloke working in his back yard I have had my 12 speed apart a couple of times and it was fairly simple Paul Quote Link to comment https://www.bigmacktrucks.com/topic/36067-12spd-maxitorque-problems/#findComment-249562 Share on other sites More sharing options...
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