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Standard transmission in a rock buggy?
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<blockquote data-quote="Nikwho" data-source="post: 1573368" data-attributes="member: 21947"><p>Hey all, </p><p>I get it that auto's are easy. VERY convenient. But I just like shifting gears! Plus, an SM465 has what, a 6.55:1 1st gear? That's LOW! So, I was thinking of putting an SM465 transmission into my rock buggy. Anyone else have one in a buggy/truggy? </p><p></p><p>Now, I need to figure out my axle gearing. I'm thinking that I'd like my buggy to be able to hit 65 MPH. That feels plenty fast for playing in the desert, driving between trails. My buggy will have a basically stock 5.3 LS based engine. Headers, holley EFI intake, mild camshaft and mild tune. Looking for reliability. Shooting for 400-450 HP. I want the SM465 behind that, followed by my NP203/Dana 300 doubler that's geared 1.96/4:1. If I run 4.56's, I'll have a 234:1 crawl ratio. With both cases in high range, and transmission in 4th, I'd run 65 MPH at roughly 2,500 RPM, wich is a pretty comfortable cruising RPM. BUT, if I run 5.38 R&P's, I'd still be under 3,000 RPM at 65, and have a final crawl ratio of 276:1. </p><p></p><p>Thoughts? I've never even ridden in a tube rock buggy. I'm trying to find the right balance in gearing.</p></blockquote><p></p>
[QUOTE="Nikwho, post: 1573368, member: 21947"] Hey all, I get it that auto's are easy. VERY convenient. But I just like shifting gears! Plus, an SM465 has what, a 6.55:1 1st gear? That's LOW! So, I was thinking of putting an SM465 transmission into my rock buggy. Anyone else have one in a buggy/truggy? Now, I need to figure out my axle gearing. I'm thinking that I'd like my buggy to be able to hit 65 MPH. That feels plenty fast for playing in the desert, driving between trails. My buggy will have a basically stock 5.3 LS based engine. Headers, holley EFI intake, mild camshaft and mild tune. Looking for reliability. Shooting for 400-450 HP. I want the SM465 behind that, followed by my NP203/Dana 300 doubler that's geared 1.96/4:1. If I run 4.56's, I'll have a 234:1 crawl ratio. With both cases in high range, and transmission in 4th, I'd run 65 MPH at roughly 2,500 RPM, wich is a pretty comfortable cruising RPM. BUT, if I run 5.38 R&P's, I'd still be under 3,000 RPM at 65, and have a final crawl ratio of 276:1. Thoughts? I've never even ridden in a tube rock buggy. I'm trying to find the right balance in gearing. [/QUOTE]
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