4L60E transmission Low1 won't hold my truck back going down hill, why?
Hey guys, this question is actually for my truck, i hope some one can shed some light for me...When i put in Low 1 and gas it, it goes normal. but if i go down hill in Low 1 with out my my foot on the throttle the truck rolls like as if its in neutral without trying to bring the RPM's up and slowing down the truck and i hear some rattling,skipping noise, why? the motor used hold me back in low 1 if i didnt give any gas in the past.... also, i dont know if its because the warmer temperature outside but after driving for 20-30 minutes i hear some noise from under the truck recently and it increases and decreases with RPM....and if i turn the truck off and restart it after 30 seconds and doesnt do the noise until after 5 minutes of using it. anyone got any ideas on whats going on? my truck is a 4.3 automatic 4x4 with 62k miles on it.......