Re: Help me!

Posted by HH56 On 2022/3/25 21:08:05
Packard transmissions and linkages do take a bit of finesse and deliberation when shifting to prevent just that problem. It is important to go thru the steps and not just slam hard when going from one gear to another. There is also a possibility of wear, damage, or looseness in the interlock block or mechanism inside the transmisson. If the problem keeps happening I would suggest giving that section a look.

As I recall, the interlock part of the block is a close tolerance rod with rounded ends which slides in a hole in the block. Opposite the rod ends is a detented area or half hole in each lever at the neutral position. A solid ramp leads to the detent on each side. As soon as one lever moves out of neutral the ramp part of the lever forces the pin to the opposite side of the block so that end of the rod will enter the detent in the other lever and prevent it from moving. For both levers to move at once I would suspect the rod or a detent is very worn or the bolt holding the entire block has managed to work loose and bock moves with the levers. The bolt working loose was a known issue more so in earlier cars that had a smaller bolt but still possible on the later units.

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jpg  interlock.jpg (55.40 KB)
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