Its been bugging me for awhile so I finally did some research. The ol' yota has always been pretty snappy... But I've always notice that 3,000 rpm's is a little high for 75mph on the highway with a 5-speed and 32 inch tall tires. Well to come to find out the truck came factory with 4.56 gears, sports the gear code for it on the firewall. But on the down side... My truck is now on 405,000 miles and the rear main is starting to leak like hell now days

 

with 4.10 gears and 31's

my 22r and 5 speed keeps the speedo at 70(actual speed is around 75-77)and my RPM's are at just a hair below 3000

yours doesnt sound odd to me???

 

I've got 4.88's and 35's, I'm at 3k at 70 mph in 5th and my odometer is 1/5th off...