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Old 05-14-2021, 02:12 PM
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vet57air vet57air is offline
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Default 8l90

Have an Gen V LT4 8L90 auto in my 66 C10. Have put 75 test miles so far. Noticed when in full automatic at city speeds (30mph) the engine rpm is about 1000 rpm. My rear tires are 31" tall and rear gear is 3:73. The engine does it but rpm seems low?
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