SWalters

Hankook drives Bridgestone or Michelin steers, sell the case back to tire guy. Do not run caps.

Thanx for all the input. I removed rear shift lid and checked fork hoping it was lose. But it wasn't so I got to use my brand new trans jack! Allentown Mack rebuilt for me going to pick up Monday AM and install.

Shifts smooth. I didn't get that far, but I will tomorrow night. I had a bearing cage come apart in trans. my speed sensor broke I changed it, then broke again few days later if that. did a little checking there was pieces of a bearing cage floating around in there keep breaking speed sensor. so Mack suggested bearing kit. so I let them do it. Clutch is brand new I took engine out last winter and sent to Allentown Mack to rebuild. Truck works hard always 80,000 plus. young drive as well, he not bad just alittle rough I think. I don't have a problem takin trans out and swap with rebuild. just don't want to if its a simple range cylinder rebuild or change shift fork and bolt. Just want to diagnose the problem correctly. thanx for your help

My trans shifts fine even in winter, but it doesn't really get cold here. If the range cylinder is not working corectly it wood leak internaly?

Can I see range fork bolt if I take off top cover on trans? I have to take top off anyhow if I have to pull rear of trans off, that where the special tools come in hand to hold the 3 shafts in place. Right? I have 580,000 on trans Mack put a bearing kit in it at 250 300 thousand should I just pull it and go thru the hole thing?

Hello Guys, I have a 18 speed Mack trans that will not stay in high side range! It will slip out and grind when accelerating then reingage when u let off pedal. I can get it to do it in the shop brakes on wheels chocked, in high gear. I change selector control on top of trans thinking it might had an internal issue, I didn't put gauge on air supply to it but there seems to be plenty of air, everything is shifting as it should. There. Is no air coming out of trans to suggest the selector/actuator that shift to and from high side is leaking internally. Any help is appreciated! I like to diagnose issue and fix problem not throw parts at like my Peterbuilt dealer. My Mack guy passed away this past winter at a very young age, and we miss him dearly!