buick840 Posted July 2, 2005 Share Posted July 2, 2005 Can anyone tell me the original diff ratio for a 1934/35 Buick 8/40 and were there any other options? Has anyone converted these diffs to a higher ratio for better highway speed or bolted in another diff altogether? If so which model diffs can been used? Link to comment Share on other sites More sharing options...
Guest imported_daydreamer Posted July 3, 2005 Share Posted July 3, 2005 try al bell in florida he should be of some help . if you need a phone # call me at 1 231 946 6609 or 1 231 3573009 ask for paul . a cheep way to raise the speed is to bolt on a set of 33 buick rims . they are 17" it does help. Link to comment Share on other sites More sharing options...
palbuick Posted July 6, 2005 Share Posted July 6, 2005 I don't have any books handy. But the 1934 series 40 and the 1935 series 40-50 were the same parts. The other series were different.I have a new ring and pinion gear set for you car but will have to check the ratio.Jim Schilf palbuick Link to comment Share on other sites More sharing options...
palbuick Posted July 12, 2005 Share Posted July 12, 2005 Finally got into garage and found ring and pinion gears for the 1934-35, 40/50 series. The ratio is 4.33 - 1 , made by Republic gear.Checking parts book seems to be standard, not positive though.Jm Schilf palbuick Link to comment Share on other sites More sharing options...
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