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| | | | Joined: Jul 2011 Posts: 74 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2011 Posts: 74 | I have a 1 ton 1948 chev panel with a 4.56 differential. Is there a ring and pinion set for this so I can get more than 45 mph.
Thanks | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Nothing that's being produced at thsi time. Only option beyond swapping out the rearend entirely would be to find the 4.10 third member that was an option in '68-'72 3/4 tons.
Bill Burmeister
| | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | An OD transmission swap is another way to crack the 45 mph barrier. You will likely also have to swap a full pressure 235 for your tired 216 to get the benefit of OD.
The 1 ton may have 5.13 gears, so switching to the higher 4.56 3/4 ton gears may give you some improvement. Double check the actual ratio, and play with the online gear calculators to see what rpm your truck is spinning at current speeds. | | | | | Joined: Jul 2008 Posts: 413 Shop Shark | | Shop Shark Joined: Jul 2008 Posts: 413 | Id double check the gear ratio that you have now, with 4.56's you should be able to go faster than 45. im guessing at least 55-60.
I know that the bigger trucks like my 2&1/2 ton which has 6.33 gears, the top speed was 45, but they also have taller tires which makes a difference.
If you do actually have 4.56's try a taller tire. They will make a difference.
Last edited by JeffL; 08/12/2012 9:14 AM.
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