Hi I am new to this forum. I just bought a 1969 GMC K15 4x4 1/2 ton with 350 2 barrel and factory stick and air truck. I have a few question:
First is my truck considered a K15 or K1500 or is it a K10??
The 4 speed has been put in the truck and it was a 3 on the tree orginally. On a 4 speed is there a drain plug and what type of gear oil do you use when replacing it? 80 w or 80w/90w?
Last question it has the orginal 4wd that has the lock outs. From the underneath it has these ball looking hubs on the inside. What do you put in them to keep them greased? There is a square plug that looks like you fill from there. Thanks for any help. Bear with me until i get the proper terminology down. JP