usually this involves accuracy of fit to the rubber , it is dragging . Probably it it is too tight Rather sadly i have had to leave a few if them a bit loose , = some wind noise . A trade . A very small amount of silicone grease may help , but that has cons . New rubber is 5 x worse at friction than old stock , some stock ones had “ flocking” on the rubber ; they work great , but you cannot get that .. 57 59 are worse if that is any consolation. You charge that rubber piece , it brings lots if trouble I never found any documentarian of it but there are two motors both fit , one is more powerful . , you can tell as it is a 1/2-1” longer . Sometimes they get mixed up in restoration . I think the long ones came in the back More torque All this came about when I made new gears of brass instead of plastic in gear box ( Forward Look Parts, still have a few ) The Nylon strips Think twice before pulling old rubber if it is functional I also found along the way a motor from a later mopar , not sure what maybe 68 era like charger , also had a tough back window. It was all sealed up in a black coating like undercoat , as water entry into case or by passing through top bearing with the ones that point up is a huge and common problem , water fills brush up area “ cup” destroys it . . Later one was larger too implying more power, but fit our gearbox with some minor fooling around There is a plastic seal or slinger on shaft, just pushed on it shrinks gets loose water runs under it . glue to shaft with weatherstrip cement .- some valve stem seals fit too Now I always drill an .060 hole in the bottom of motor end cap on any upward facing one , centered under shaft , a drop of oil , no more, helps lobe bronze bush often dry and lets any water out. OK to do with motor together , any chips are under shaft not in bearing Hope this helps Really Aggravating . There are powerful Dorman power window motors / gearboxes( one piece, low $) for much later cars but electrically different , a permanent magnet . Have to flip leads to reverse ( needs relay ,)I worked that out ok —- went to redrill to mount it , feeling like “AHA solved !! “ Could not believe it , they changed the pitch of gear teeth on mesh Pinion is pressed on , or one piece, in plastic box, Someone may want to chase that… … John G On Mar 12, 2026, at 1:15 AM, 'Matt Allyn' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote: -- For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang --- You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group. To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx. To view this discussion visit https://groups.google.com/d/msgid/chrysler-300-club-international/DB462B80-A42E-4031-A7F8-D3C745E7472B%40gradyresearch.com. |
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