Quote:
Originally Posted by vet57air
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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Who did the tune? Did you give them the tire diameter and rear gear?
Don