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#1
02-02-2020, 03:30 PM
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Standard Gear Ratio 4-speed
Can someone please clarify for me the standard gear ratio for a 4-speed, non air, 4bb car? The original brochure isn't clear to me. I thought it was 3:55.
Also would a 1966 complete rear drum to drum assembly be a direct bolt in on a 1965? Thanks
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#2
02-02-2020, 04:08 PM
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1966 and later rear axle housings are 1" wider vs the 64/65 Housings.
Most will still bolt in with no issues unless you had some Tire/Wheels that were close to rubbing the rear wheel housings with the earlier rear axle. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#3
02-02-2020, 04:25 PM
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This is a link to the 1965 Pontiac Performance brochure: http://www.oldcarbrochures.com/stati...rmance-16.html It appears to indicate the standard rear axle ratio for a four barrel, four speed car was 3.23:1. 3.55:1 was standard for a 360hp tripower car.
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#4
02-02-2020, 06:20 PM
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Is that a good link? I can’t seem to bring it up
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#5
02-02-2020, 07:15 PM
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Quote:
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My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic. |
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#6
02-03-2020, 04:15 PM
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Thank you guys, I appreciate the help.
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#7
02-03-2020, 07:45 PM
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It’s funny (strange). I can’t connect to the link on my I-phone. I tried on my laptop and it came right up.
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