OOPS! I got your rig confused with another bolter's, who is trying to run a high axle ratio with a T-5. Is the 3.38 an original NAPCO ratio? That still seems to be too much gear, especially with tall tires. I assume both axles are geared the same, which would be the reason for not going to a lower ratio final drive.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!