i am new to this forum, and new to 4 wheel driving in general. I have recently aquired a 77 blazer with 454. I love everything about this truck so far except that when it is in 4H or 4L and i accelerate hard and the truck meets any resistance (like when climbing a steep rocky hill) I have to hold onto the 4 wheel shifter lever to keep it in 4 wheel drive. In 2 high I have no such problem. Can anyone diagnose this for me and tell me what i need to do (parts, etc) to fix? Thanks, Adam

 

No need to have multiple threads on the same topic. I moved your other thread to the Fullsize tech section to get better information. I have also replied to your question.

*Topic Closed*