Yesterday I was a quart down. I bought 50w and dumped in it I usually run 20w-50w. It has been making it run better. I have a problem with it shifting fast. When at a dead stop. It shifts at 10 then again at 15. Since I put that quart of 50w in it it has been running and driving smooth. It used to be a mud truck and I think the motor is worn down but when I got the truck the motor was strong so I kept it. The tranny was rebuilt a year ago.
Oh and I just put a new set of after market gauges in it.