Pedal ratio is overlooked by most of the people as a potential source of a stiff pedal. This is less of your problem with later muscle cars and more of the problem in earlier street rods in the event the booster/master is mounted in the vehicle at fiverbrakebooster.com. However, pedal ratio is as big a problems in either case, thus it must be considered like a potential grounds for a hard brake pedal.

Pedal ratio means relationship relating to the pedal’s pivot points along with the length of the brake pedal. The pedal is used as being a lever to make use of motion towards the booster (or directly for the master cylinder if the car don't even have a power booster) in line with the length of the pedal. If the pedal ratio is incorrect by less than 1/4”, this will allow weak hands pushrod to advance through for the booster. This, in return prevents the booster motionless the piston in to the master cylinder. The hard pedal you experience is actually the bottoming out from the pedal as well as movement but leaving stroke in the master cylinder and so brake pressure with the wheels.

The step one is to verify the place that the problem is located. I would start with disconnecting the shift linkage for the transmission if the transmission could be shifted manually from within the car for the transmission bell crank. If the transmission could be shifted through the bell crank, then the issue is in the shift linkage or shifter assembly. It is true that some replacement parts are actually discontinued. There could be something which fell to the shifter that may be causing the problem. As for replacement parts, there are numerous salvage yards, and quite a few GM parts will interchange.

You’re right that this front brakes do many of the stopping. So most manufacturers do put smaller, thinner pads for the rear wheels Toyota brake booster . But something obviously went wrong in such a case. My guess is Chrysler just cheaped out an excessive amount and grossly under-designed the brakes within this car. They went beyond the boundary in “de-contenting” (i.e., saving cash).

I’ve heard that Chrysler has extended the warranty for your front brakes within this vehicle. But customers have complained that that “warranty” repair will not be free, that dealers charge a “deductible,” which varies in line with your mileage. And, apparently, with what seems to be a reasonably clear admission of your design mistake, they beefed in the brakes in the future to slow the torrent of complaints.