I have a 88 4x4 pickup with 3.0, it will not go in any gear while it is running , but i can switch it off put it in gear and start it and it will take off fine. But still willn't take another gear.What the heck???

I had this issue with my daily driver. Ended up being clutch related, when I dropped the trans and clutch, I noticed the disc had lost a spring.

I hope this helps,

Thanks,

Almost certainly the clutch not fully disengaging.

But first check the pedal bracket: https://www.yotatech.com/forums/f116...fatigue-32667/

Thanks, I was hoping it wasnt something worse..