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I hope I picked the correct category. "Hudson" was not available..
I just finished installing a 4:11 gear in my 49 Commodore eight with OD. The original 4:59 had the engine "happy" at 50 MPH but a bit stressed at 60MPH. I live on the FLAT east Coast of Florida. The steepest thing we encounter are the high rise bridges over the Indian river and Interstate overpasses. If you don't have a lot of hills in your neighborhood.. I highly recommend the swap. It took a while to acquire all the seals, gaskets, speedo drive gear etc.Thanks to the help of other forum contributors. It was well worth the effort. I used the royal Purple 75-150 gear lube ($20.00 a qt.) Also I used a Ford/Mercury wheel bearing grease. It was recommended by a friend and experienced mechanic. He said he has quieted several rear wheel bearing noises on Ford pickups even after installing new bearings! The only difficulty encountered, was setting up the end play. After a few more miles, I am going to re-check to make sure it's not too tight or loose. Thanks again guys !
Live in the past.... it's cheaper.
49 Super six Brougham
49 Commodore Eight Convertible