My tranny works fine but I find when I'm driving in town(30-60 km/hr) the tranny shifts into high gear too soon and I'm driving at 1000-1200rpms. Then when I give it gas to accelerate the tranny seeems somewhat slow to downshift. I do have 273 rearend.
Is this normal or is there an an easy adjustment I can make?
Thanx for your advice.

 

Start here: To adjust the TV Cable skip the book method and do this: Press the 'D' shaped lock button on the adjuster and loosen the cable setting (The black housing that the metal cable is in will move forward). Now, have someone floor the gas pedal while you check to see if the throttle plate is open all the way. Usually they are off a little and will wiggle. Do whatever you have to do to get it open solid. Now, with the pedal still floored, press the 'D' button and pull the cable casing (the black tube) back as hard as you can (putting maximum tension on the metal cable) and release the button. You now have the engine, tranny and gas pedal all in sync at WOT. Mark the cable casing so if for some reason it gets moved you can know where to put it again. The problem with the 'self adjust method' is that it bends things and puts them permanently out of whack. It is also the full TV setting, which is theoretically what the GM method does.