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Old 02-15-2023, 03:03 AM   #27
Richard
Senior Member
 
Join Date: Dec 1999
Location: Southern California
Posts: 2,698
Re: What's rear gear ratio are you running?

Putting 5.13's in my 72 with 37" tires. 6L90 installed. The low first gear should be fine and allow for good acceleration from a stop. IIRC final gear is .67. Expecting around 2100-2200 rpm at 65. Which is right where my 94 is with 3.73 and 32's. High gear ratio is not always good for mpg. My brother had told me that people were installing lower gears in the newer Toyota's and milage increased. Low RPM at cruise is not good if motor is struggling.
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Richard
1972 K10 Custom Deluxe SWB Fleetside
My build https://67-72chevytrucks.com/vboard/...d.php?t=800746
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