Yes, you need to change your TCC. You can either re-use the one from your old transmission, or get a new one for your '95. You will need to change the spedo gear, or your speed and mileage will be off (over). You don't want the odometer to say you have more miles on the car than you actually do. I don't know what color gear you need, but I think, IIRC, I needed the orange gear for my 3.08's.
'95 Cougar - 2002 Explorer engine, 2004 Mustang PTP2 PCM
PI 4.6L 95 XR7 Cougar: [email protected]
2004.5 Silverado Crew Cab/Long Bed/4x4 6.6L Duramax: [email protected]
(Weighing in at over 7200#) on 10/19/2007
Dyno - 446.4RWHP/820.2RWTq
Pulling - 300.9' 3rd place finish 8/2011