M35A2 popping out of 1st gear

[dainwei]

I apologise in advance if there is already a post on this I tried to search for it.

I am a new deuce owner.

My M35A2 keeps popping out of 1st gear everytime. Any ideas?

I will continue into the TM but was hoping someone might be able to point me in the right direction.

Thank you in advance.

 

[Menaces Nemesis]

Really the only thing you can check on the outside of the trans is that nothing is pushing the 1/R shift shaft and residual linkage on the top/back of the trans away from the trans case (doubtful unless you installed some kind of backup alarm/lights using that aparatus). I believe you'll need to pull the top plate off and see what's going on. Maybe something with the 1/R shift shaft ball/spring detent is loose/gone, or 1/R shift fork is loose or broken (kinda doubt it), or maybe you've got some broken teeth on the main and/or sub 1st gears... TM 9-2320-209-34-2-1 Chapter 8.

 

[dainwei]

Thanks for the reply. I will take your advice and start there.

 

[Stykz]

Ive also had the same issue maneuvering at low speed, when rocking the truck back and forth to steer in a tight space. Turns out it was the old sprag transfer case binding up and it would kick me outta gear so damn hard. I ended up pulling the front driveline and stopped having issues.