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xllr8 Aug 14th, 99, 4:25 AM I just bought a 65 chevlle with a 12 bolt posi and 5.57 gears and am wondering if it is a 4 series carrier what is the highest (lower numerically) gear i can run in this carrier no i dont have the casting #'s right now and it's in storage thanx Tony Aug 14th, 99, 6:28 AM I had 5.14 gear on a series 4 when I bought the car. Changed to 3.73 gear. It works good but the ring gear looks real thin. Wes Colby Aug 14th, 99, 2:52 PM Geez, those ARE some steep gears! I think the lowest numerical gear ratio available for a 4 series carrier is the 3.73. ------------------ '70 Malibu - 383 'Dental Gas' Inhaling Stroker! Gold Member #39 Chevellz Alwayz! tom3 Aug 14th, 99, 2:57 PM I had a 64 with the "punkin" type diff. with a 3;73 and had to use a spacer to get to 4;11 so I'd guess you're restricted to a 4;11 unless you can find a special thin ring gear. Could be wrong, only messed with this one in that regard. tom drptop70ss Aug 14th, 99, 3:30 PM actually I think 3:90 is the highest gear for the 4 series carrier, 3:73 would be a 3 series.. ------------------ 70 chevelle ss396 conv 66 chevelle ss396 hdp/conv Wally Aug 14th, 99, 3:58 PM 5.57 is not steep Wes, try a 6:14! Had one in the SS/IA camaro, 8500 in the lights with stock rods. Every now and then it would cut one loose, many bags of oil dry! ------------------ Wally Gold #67 67 malibu Wes Colby Aug 14th, 99, 5:22 PM Drptop70: I use an Auburn Pro 4 series carrier and the lowest numerical gear available (thru Jeg's and Summit - Richmond gears) is the 3.73 ratio. I am SOL if I want to go any lower with a four series - 3.73 is the limit for my set-up and I 'think' is also the limit for most other 4 series posi's. Wally: What does that sound like when it grenades at 8,500 rpm's! ------------------ '70 Malibu - 383 'Dental Gas' Inhaling Stroker! Gold Member #39 Chevellz Alwayz! Wally Aug 14th, 99, 6:03 PM Wes, the funny thing is it gets quite! All that header noise then some clanking then quite. All you hear is the tires and the gear noise. Did a couple, both in the big end at full tilt. The second sprayed the tires, got a little interesting stopping. The low pressure oil light comes on after it blows, HELLO! ------------------ Wally Gold #67 67 malibu Wes Colby Aug 14th, 99, 10:28 PM Wally, in a strange, sick sort of way, I too would like to experience that moment in my Chevelle. I just don't want to pay for the fragged motor! Hmmm...maybe I could find a donor, hehe. ------------------ '70 Malibu - 383 'Dental Gas' Inhaling Stroker! Gold Member #39 Chevellz Alwayz! | ||