by Pete in NH » Tue Mar 04, 2014 4:44 pm
Hi,
Welcome to the club!
Thanks for the compliment Gary, but this may not be any easy one to solve.
A band adjustment may help,but it may also be a more involved problem. A factory service manual is going to be needed here to check several other adjustments. First, the throttle cable adjustment needs to be correct as well as the gear selector cable adjustment. First thing I would do is check the fluid level and condition. Pull the transmission dip stick out and check the condition of the fluid. It should be a clear reddish color and not have a burnt smell. If it smells like old varnish and has a yellow-orange-brown color it is burnt. Burnt fluid is a sign of slipping transmission clutches and bands.When you changed the fluid back in 2009 did you use a Dexron type? Chrysler says their new ATF-4 type is back compatible for use in any transmission but, I'm not fully convinced of that. The newer fluid has different friction modifier characteristics.
Unlike todays automatics which are controlled by computers these old three speeds were all hydraulic and the brains of the transmission is a valve body assembly full of oil passages and spring loaded shuttle valves. I suspect by your description that since the 2-3 shift is very late and the engine RPM's are way up there may be a hydraulic pressure issue form a stuck valve, bad servo seal or internal fluid leak somewhere.
Anyway, to adjust the kickdown band that is right in front on top of the transmission case- back of the lock nut 5 turns and make sure the adjusting screw is free to turn. With a torque wrench tighten the adjusting screw to 72 inch-pounds. Back the adjusting screw off 2-1/2 turns and hold it in that position while tightening the lock nut to 35 foot-pounds.The low-reverse band is inside the case and you will have to drop the pan and fluid. Back off it's lock nut 5 turns and tightent the adjusting screw to 41 inch-pounds. Then back it off 3-1/2 turns and tighten the lock nut to 10 foot-pounds.
If you have to drop the pan and fluid you will learn a lot about what is going on inside the transmission. If the bottom of the pan has a lot of little metal shavings, along with band and clutch material the transimmsionis going to need an overhaul.
Hope this helps a little and let us know what you find.