munceyman

I swap a 1998 3.8 motor and Automatic Transmission to a 1996 that had a 3.8 in it. motor runs good but the Automatic Transmission is stuck in limp mode I had it a Transmission shop and they told me to put the 1996 Transmission back in then it will work again . it is in limp mode and the o/d light is flashing . any other idea that may be wrong . thanks for your help

99GTvert

Moving to tech..

munceyman

ok thanks

superbros

So I started experiencing my*rpm*rise more than usual, as if the gas were going on its own when it's on neutral or on any gear. When I'm shifting to 3rd gear...during the transition(clutch) my*rpm*goes up to 2000-3000..but then settles as the shift is changed..it happens on every shift. I cleaned out the throttle body, and replaced my iac and I don't have a vacuum leak...but what I did notice is when I disconnect the electrical part of the iac, a turn it on, the cars'*rpm*works perfect (1000)..but as soon as I connect it, it begins to rise (1,500-2000).. please help.