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they all differ ,but very slightly when all the hydraulic systems that interface are working correctly.4900 to 5300 is common and the best for stock engines.oil viscosity and converter coupling also causes slight changes.
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CRISTOFOROS KOKKONIS GM AUTOMATIC TRANSMISSION SPECIALIST
www.ckperformance.com
STREET,STRIP AND DRAG RACE TRANSMISSIONS,CONVERTERS,DRUMS ,SHAFTS ETC.
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