Re: Shudder
Posted by HH56 On 2021/5/25 10:48:39
Assuming there is no grease on the clutch disc then in addition to checking the condition of engine and trans mounts also check and see if there is a snubber bar on your car mounted between a bracket on the trans and another to the frame. This was an item introduced in the late 30s and carried on in various forms until the 51 models.
Not all models needed them but it was added to help control what Packard called clutch chatter. The 3 point engine mounts on the models prior to 51 could allow the engine to shift slightly fore and aft and the bar was added to help control this motion. While the problem was mostly in reverse, it could also happen in low as the car started out from a stop.
Check to make sure the brackets are tight and the rubber bushings at each end at the rod/bracket connection have not deteriorated. Bar was adjusted fairly snugly to add a slight bit of tension to the engine/trans assy to stabilize any fore/aft movement and keep it to a minimum.
Here is a 21st series version which would be very similar if not identical to what would have been on any 22nd series models equipped with the bar. If your car does not have one perhaps something could be fabricated and tried if no other reason for the shudder is found.
Attach file:
snubber .jpg (166.59 KB)
Not all models needed them but it was added to help control what Packard called clutch chatter. The 3 point engine mounts on the models prior to 51 could allow the engine to shift slightly fore and aft and the bar was added to help control this motion. While the problem was mostly in reverse, it could also happen in low as the car started out from a stop.
Check to make sure the brackets are tight and the rubber bushings at each end at the rod/bracket connection have not deteriorated. Bar was adjusted fairly snugly to add a slight bit of tension to the engine/trans assy to stabilize any fore/aft movement and keep it to a minimum.
Here is a 21st series version which would be very similar if not identical to what would have been on any 22nd series models equipped with the bar. If your car does not have one perhaps something could be fabricated and tried if no other reason for the shudder is found.
Attach file:
snubber .jpg (166.59 KB)
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