I am swapping my 98 gt 4r70w automatic transmission. I did my research and learned that only another 98 gt 4r70w automatic transmission would be an easy plug-and-play fit. I took my transmission out and bought a transmission from a guy who owned a shop 4 hours away. The guy told me it's a 100% plug-and-play as it is another 98 gt 4r70w. However, I think it's a Mercury Grand Marquis 4r70w transmission. The wiring harness for the transmission is completely different and when I looked up the...

98 gt transmission swap