NightRunnerRC
Full Access Member
After an an almost 2000 mile round trip from texas to daytona fl and back for the 4th....noticed a few things about the truck. First road trip now....
When going 75 with cruise control set in 6th, for hours at a time...i have noticed that my rpms are different sometimes. 1700, 1300, 1100, 750, have even seen 400.
This is all with no foot on the gas, nor speed change. Stopped for fuel, back on the road get to speed, throw it in 6th...poof, 500 rpm. put into 5th, normal, back to 6th 500....
Now for the trippy part. While cruising, watching my tach, 1600 rpms...it will suddenly drop to 1100 or lower and shoot right back, all within about a second or less. same with the 1100 to 500 drop.
while thats happening i feel no movement change in the truck, nor exhaust tone change. speed still at 75....WTF
WHat is the normal rpm range for 6th gear @ 75 mph and could this be something electrical in the tach?
When going 75 with cruise control set in 6th, for hours at a time...i have noticed that my rpms are different sometimes. 1700, 1300, 1100, 750, have even seen 400.
This is all with no foot on the gas, nor speed change. Stopped for fuel, back on the road get to speed, throw it in 6th...poof, 500 rpm. put into 5th, normal, back to 6th 500....
Now for the trippy part. While cruising, watching my tach, 1600 rpms...it will suddenly drop to 1100 or lower and shoot right back, all within about a second or less. same with the 1100 to 500 drop.
while thats happening i feel no movement change in the truck, nor exhaust tone change. speed still at 75....WTF
WHat is the normal rpm range for 6th gear @ 75 mph and could this be something electrical in the tach?