south woods

My Mack 13 speed, is about to bite the dust. I can't locate used one. Can I put in a fuller 13 speed, in terms of of everything matching up. Could I go back with a different Mack transmission, say a 9 or a 10? Would this affect power/speed? This is on a 91 ch613 with a 350 in it. i don't use the truck much anymore and not wanting to put the $3500 for a rebuild price in it.

Got the top plate pulled, forks and rails and detent are fine. only thing we could figure is the shifter isolater. When shifter goes into reverse it is hitting the dash and still not putting it all the way in reverse. Will get the part tomorrow and post back results. Thanks

I Will have to see if i can get to the cover through the plate in the floor board of the cab.

I have a '92 Ch613 with a MAck 13 speed. It has started popping out of reverse, on both high and low side. It was not that bad at first but has gotten worse. Any ideas on what it could be? Synchronzer maybe? thanks ahead of time for the replies. Andy