project99

Hello all, Having an issue with my 92 4runner 3.0 with auto. The problem is occurring when I put it in "drive" and take off from a stop, the transmission engages and pulls fine until it shifts from 1st to 2nd. During the transition of 1st to 2nd gear it will rev almost like it's slipping, but when I let off the throttle it shifts into 2nd gear, then I can get back on the throttle and it's fine, no slipping or shutter. And the rest of the shifts are completely normal.
Checked fluid and that's fine, level and condition. It is lifted with 33's and has 157,000 miles on it. Thanks for any input.