Latley my truck has been lugging and bogging down when driving in 4th or 5th gear on a flat road. It is a 5-speed. It is starting to piss me off. I have a fairly new clutch and the truck is maintained well. I'm not sure what the cause is. Sometimes it feels like it shifts hard and the clutch sometimes feels a little rough. I don't drive my truck like it's a POS either. I am probably the most grandpa-like 24 year old there is.
The other night I was on my way home from working at OHSU (35 mile drive) and it started a few miles from my house. I was driving 60 mph in 5th on a flat stretch and it felt like the clutch started slipping and no matter how much gas I gave it, it would continue to bog down. Even when I down-shifted, 4th gear did the same thing. When I got it home, it smelled like something was very hot. It didn't smell like clutch smell. There seems to be a slight vibration in the floor. It doesn't feel like a drive shaft vibration.
In addition, and this is weird, I have a very tight new front end on that truck but when I am driving, it feels like it is wondering. However, the steering is exceptionally tight. There is no play at all. I have 31x10.50 new tires and a new steering rack with all new bushings and tie-rods, ball joints etc. The entire front end is new.
Here is the weird thing. I thought I was crazy because when I would press on the clutch when driving, the truck would wonder! I thought it was just from me moving the steering wheel when I shifted my body around. I also noticed that the truck pulls to the right when I accelerate and it pulls to the left when I let off on the throttle.
I want to fix this problem but I have no idea as to what the cause may be. I was thinking axle wrap ( it has new springs, gas shocks etc) or it could be the clutch or one of the bearings in the transmission. Could it be a bad wheel bearing in the rear or the rear differential?