2009 ram 1500 4.7 bought used 60k
pretty happy with it .
only thing is a noise
certain speeds and incline I get a combination of a rumble / grinding noise seems to be from drivetrain front side or near the firewall , Any input before I listen to the 'dealer" song and dance.

second question is when towing "boat" I am in tow haul mode when should I shift it out of 5th gear and do i leave it on when up to highway speed , towing about 3700 /4200 lbs.
Thanks

 

Welcome to DF
I will move your post to the 4th Gen Ram section.

 

Wnd,

There was a couple of recalls on the 2009 models but nothing I could see that would cause a grinding. If you want to PM me the Vin I will check to see if there are any open recalls on your vehicle. As far as tow/haul I would only offer what is included in the manual. See below.

Automatic Transmission

The “DRIVE” range can be selected when towing. However,
if frequent shifting occurs while in this range, select
“TOW/HAUL” mode (if equipped) or select a lower gear
using the Electronic Range Select (ERS) feature.

NOTE: Using “TOW/HAUL” mode or a lower gear
range while operating the vehicle under heavy operating
conditions will improve performance and extend transmission
life by reducing excessive shifting and heat build
up. This action will also provide better engine braking.
The automatic transmission fluid and filter should be
changed if you regularly tow a trailer for more than
45 minutes of continuous operation. Refer to the “Maintenance
Schedule” in Section 8 for the proper maintenance
intervals.

NOTE: Check the automatic transmission fluid level
before towing.

Tow/Haul
To reduce potential for automatic transmission overheating,
turn the “TOW/HAUL” feature ON when driving in
hilly areas, or select a lower gear range (using the
Electronic Range Select (ERS) feature) on more severe
grades.