thunder71173
SLP, GTP or call it MUT!
As the title states will a 4t65e with 305 gears out of a 99 park ave work in my 99gt with the pcm modified for the gears?
It's this dooooohickey
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Another thing to consider is if the trans lines are click or threaded. PA and the larger bodies typically had threaded in 99, while the W bodies were typically click. Easy to adapt, but something to keep in mind.