If slippage is caused by pressure loss, or clutch slippage, there is going to be tell tale signs in the fluid(color, odor). Mechanical portions of the transmission(hard parts) are almost never going to have slippage as a symptom. With a failure of a hard part, you are either going to have no movement, or significant noise. What you are describing may be symptomatic of a torque converter, but that is not necessarily going to be gear specific, since it is doing the same thing in all gears. The exception to this is higher gears, and torque converter clutch lockup. This should happen in third and fourth gear, in excess of 40 mph is when it applies.
Saturday, July 3rd, 2010 AT 1:15 PM