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Old 09-23-2002, 10:59 AM
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Post Ring and pinon swapping

Well I got there rearend from the 76 Nova home. I took the cover off and counted the teeth. The ring has 41 and the pinon has 14. with my calculations this means its a 2.93 gear ratio. Thats not what I wanted. I plan on a SBC and auto trans. Guess Ill run high rpm's on hwy with this? Whats involved in swapping the ring an pinon out? Iam wanting 3.55 or 3.75. I want good hwy driving but still would like to burn a little rubber! If someone could help explain the process of swapping them out see if it something I want to do. Thanks!!

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Old 09-24-2002, 10:16 AM
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Answered my own question www.ring-pinion.com/installation-kits.shtml
incase some one else needs to know.
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Old 09-24-2002, 03:54 PM
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my take's always been that you need some kind of fancy dial indicator gizmo to set your pre-load when changing gears unless youre changing the whole pumpkin. kind of a mysterious thing going on, i'll have to check your site out
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Old 09-24-2002, 03:55 PM
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2.93 would give you low rpm on the highway and a high top speed, 3.55 is a good combo for decent highway speed and good acceloration. I have 4.27 which are awesome for racing, but I also have an overdrive so I can cruise on the highway under 3000 rpm
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Old 09-24-2002, 04:42 PM
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use the 2-92 gears and go with a 700r4 if you are using a sbc . the 700r4 is alot lower speed than a th350 and you have overdrive for cruising
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Old 09-24-2002, 05:15 PM
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2.92 with overdrive!! Is this gonna be a bonneville car? I'm stickin with what I initially said, 3.55, then if you put the 700-R4 on there you would have an awesome cruising speed/rpm. I think 2.93 is way too high to be combined with O.D...
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Old 09-25-2002, 11:21 AM
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Well....after reading thru the instruction book at Randy's ring I decided I wont tackle that right yet. My choices on drive train are a SBC 305 that I have(It was givin to me) and a 350 trans or a 700r4 or a buddy of mine is getting together a hi-output SBC 400! Thats what I am hoping for. Then Ill use a TH400 trans. I ran a general tire hight and the pinon size thru the calculator on the web site and at 70mph will keep me under 3000 RPM's so that whould work for now. Thanks for the input!
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Old 09-25-2002, 12:10 PM
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With 2.92 you'll use up hp to get you rolling. You'll be slow off the line with low RPM at highway speed. I think 3000 RPM is alittle high at 70 MPH I think it will be closer to 2500 RPM or even lower.

Hey what up drgnwgn289?
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