dmac2590
Junior Member
- Joined
- May 15, 2023
- Posts
- 13
- Reaction score
- 7
- Location
- butler pa
- First Name
- Dan
- Truck Year
- 1977
- Truck Model
- K15 Sierra Grande
- Engine Size
- 350
I replaced my 4 speed Transmission with a "good" Transmission early this year. It has penn GL-4 fluid in it. When I shift into 4th it sounds like a rock tumbler from 35 mph up to about 50 mph. I kicked the transfer case (np205) into 4 hi went down the road and zero noise from anywhere in the transmission or transfer case. Truck has new clutch, flywheel, throw out bearing, pivot ball and clutch fork. Anyone seen this or heard this before? Any input is greatly appreciated. Thank you all.
