Ranch Hand
Active Member
We recently purchased this truck to work on and off our ranch. It’s rated 46000 GWV, 13’ bed, Tandem axles, CAT C7 engine, Air spring suspension, 10speed transmission.
I have some questions about it.
1) When driving down the road empty (never carried a load yet) it makes a “thrumming” sound. The frequency of the sound changes with the speed of the vehicle. The tires are in fair shape, tread depth is around 5/32”. My brother thinks it’s because the tires don’t have all the exact air pressure. The pressure ranges between 85-95 psi in the different tires. Is this the problem, is something else wrong, or it’s just the way these trucks sound?
2) When shifting and I double clutch, it is very hard to get it go into the next gear, particularly downshifting. The road and engine speed has to be perfect before I can get it in gear. I actually find it easier to clutch to neutral and then push it into the next gear (without grinding) when the engine syncs up to the road speed. I help on the ranch on weekends so I am new to double clutching, but all the videos that I have watched on double clutching, this issue doesn’t seem to be an issue. I want to make sure that it’s me and not the transmission that needs work.
Thanks
I have some questions about it.
1) When driving down the road empty (never carried a load yet) it makes a “thrumming” sound. The frequency of the sound changes with the speed of the vehicle. The tires are in fair shape, tread depth is around 5/32”. My brother thinks it’s because the tires don’t have all the exact air pressure. The pressure ranges between 85-95 psi in the different tires. Is this the problem, is something else wrong, or it’s just the way these trucks sound?
2) When shifting and I double clutch, it is very hard to get it go into the next gear, particularly downshifting. The road and engine speed has to be perfect before I can get it in gear. I actually find it easier to clutch to neutral and then push it into the next gear (without grinding) when the engine syncs up to the road speed. I help on the ranch on weekends so I am new to double clutching, but all the videos that I have watched on double clutching, this issue doesn’t seem to be an issue. I want to make sure that it’s me and not the transmission that needs work.
Thanks