Highway RPM with the 200R4. Gotta love it!

Treblig is the man who inspired me to install a 200R4. I can't thank him and MopartoYa enough. Every day that I drive mine, I enjoy the conversion. I'm running 275/60-15's on mine with 3.91's and a high quality, 3000 stall lock-up converter. It really transforms the car. The out of the hole manners and timing of the up shifts is perfect. Lonnie at Extreme Automatics makes a strong, well-mannered transmission that can hold 750 hp in his Stage 2 configuration and over 1000 hp in his Stage 3 version. They will bolt right up to any Mopar including the new Hemi's with a simple SFI rated bellhousing. Nothing for the Slant 6 crowd yet though.

I used the SFI rated bellhousing to attach mine, and have the lock-up torque converter that only activates in 4th gear. It can be turned on and off with a simple 12V switch. It drops it an additional 3-400 rpm on the freeway. It's the closest thing to a 5 speed automatic out there.

If you look at Treblig's notch in the crossmember, I removed the remaining rear section too. I reinforced that section by boxing it in, welded the crossmember to the floor across the car and added a 1/4" strap of steel on top of the floor to further box in the entire structure. It's flat and didn't change the shape of the carpet on the floor. I also made a new cross member that adds additional strength to the structure.