Justinboese Posted November 16, 2015 Share Posted November 16, 2015 Hello everyone. I recently lost my low range. I pulled both rear inspection covers and had someone split gears while I looked inside. Looks like shift fork is moving but not fully engaging. I tried to help it with a pry bar with no luck. It almost seems like fork is holding it back. I thought maybe bolt on fork came loose but figured if that were the case I could have manually pushed it back. I haven't pulled the rear top cover yet as it is very tight between cab. How far does cover have to come up to get out? Is there something that would limit movement on top cover? Any help would be greatly appreciated. Thanks, Justin Quote Link to comment https://www.bigmacktrucks.com/topic/42684-12-speed-help-please/ Share on other sites More sharing options...
mrsmackpaul Posted November 16, 2015 Share Posted November 16, 2015 Welcome JustinThe trans top cover on the high low should be able to fit out between the cab floor and the top of transmission I have the bolt the holds the selector on the high low drop out once and had the same thing as you describe happen to me Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/42684-12-speed-help-please/#findComment-311674 Share on other sites More sharing options...
Full Floater Posted November 21, 2015 Share Posted November 21, 2015 Have you tried replacing the air supply spin on filter? Seemed to help a little when I was (still am) having issues with the reverse selector. Damn now im paranoid about those bolts. Did I tighten them enough??? hmmmm Quote Link to comment https://www.bigmacktrucks.com/topic/42684-12-speed-help-please/#findComment-312331 Share on other sites More sharing options...
e9500v8 Posted November 22, 2015 Share Posted November 22, 2015 Is fork sloppy in the slot? Just had mine apart cuz the fork and gear were so worn it was going into gear when in neutral. Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/42684-12-speed-help-please/#findComment-312448 Share on other sites More sharing options...
Justinboese Posted December 17, 2016 Author Share Posted December 17, 2016 Ended up pulling Trans and rebuilding. It was that or pull hoist and box as its a dump truck. Thanks for replies. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/42684-12-speed-help-please/#findComment-355301 Share on other sites More sharing options...
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