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RPM Calculator

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Popular Transmission Ratios - use for input below TRANSMISSION 1ST 2ND 3RD 4TH 5TH GM Muncie (M20) 66-74 2.52 1.88 1.46 1.00 n/a GM Muncie (M20) 63-65 2.56 1.91 1.48 1.00 n/a GM Muncie (M21/M22) 2.20 1.64 1.28 1.00 n/a GM Powerglide 1.76 1.00 n/a n/a n/a GM Turbo Hydra-Matic 350 2.52 1.52 1.00 n/a n/a GM Turbo Hydra-Matic 400/4L80E 2.48 1.48 1.00 0.78 n/a GM Turbo Hydra-Matic 2004R 2.74 1.57 1.00 0.67 n/a GM Turbo Hydra-Matic 700-R4/4L60E 3.06 1.63 1.00 0.70 n/a Tremec 3550/TKO 3.27 1.98 1.34 1.00 0.68

Speedo Gears Link - Team Chevelle  

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Input - Note: Currently set for my personal trans (TH350) and rear tire combination.

1st gear ratio:		3rd gear ratio:		5th gear ratio:
2nd gear ratio:		4th gear ratio:		6th gear ratio:

Tire:

155 165 175 185 195 205 215 225 235 245 255 265 275 285 295 305 315 325 335

x 30 35 40 45 50 55 60 65 70 75 80

x 12 13 14 15 16 17 18 19

Rear axle ratio:

Speed (mph):

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1st gear RPM is:		3rd gear RPM is:		5th gear RPM is:
2nd gear RPM is:		4th gear RPM is:		6th gear RPM is:

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Input - Second set for comparison using 700R4 specs

1st gear ratio:		3rd gear ratio:		5th gear ratio:
2nd gear ratio:		4th gear ratio:		6th gear ratio:

Tire:

155 165 175 185 195 205 215 225 235 245 255 265 275 285 295 305 315 325 335

x 30 35 40 45 50 55 60 65 70 75 80

x 12 13 14 15 16 17 18 19

Rear axle ratio:

Speed (mph):

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1st gear RPM is:		3rd gear RPM is:		5th gear RPM is:
2nd gear RPM is:		4th gear RPM is:		6th gear RPM is:

 

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© 1970-1972 LS3 Showcase & Registry

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This website is designed and maintained by Webs by Dale™ (WBD). This website was created as a showplace for LS3-optioned Chevrolets. WBD shall not be held liable for any loss resulting from the use of the information contained on this website. This website is the sole property of WBD. Design, layout and website photographic images were all created by WBD or submitted by readers and are not to be copied or distributed without express consent from WBD in writing. Use of WBD name, logo and identity is strictly prohibited by law.

All submitted photos become the property of WBD and may be used for any legitimate purpose on this and other websites in the Webs By Dale family or any print publications (books/calendars/CDs/et al.) associated with this author's efforts without payment expected or due to the contributor. Submitted photos by any registrant may be used by WBD for display on any other WBD website without compensation.

While every effort is made to ensure the Chevrolets on this website are what they claim to be, WBD does not verify the cars beyond what documentation is provided. One must take their due diligence in seeking to purchase any Chevrolet and not rely on any website, including this one, to validate the bona fides of any owner's claim.

This registry and showcase website is not designed to help you locate a car you owned 20-30 years ago. To my knowledge there is no known database of a car's VIN and its past/current owner. Such a public database would be a gross invasion of privacy. The  LS3-optioned Chevrolets listed here are done so by the current owner at time of registration and may have changed hands since registration. If you are seeking information on any vehicle registered here, this website will only contact the owner with your request and it will be up to them if they contact you or not.