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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#27678 03/18/2004 12:05 AM | Joined: Mar 2001 Posts: 259 Member | | Member Joined: Mar 2001 Posts: 259 | I have all these Factory Chevrolet Service News Bullitins that were give out to the factory mechanic and this is what it say's about the rearend gears for the 58 truck. "Series 31 and 32 carry the 3.90:1 axle ration of previous models as standard equipment. An Optional axle of 3.70:1 is now available" Is this the fuel saver option??
I looked in my Interchange Manual and thought that I found that number you indicated but it's one number shy. I found 3748436 which is for a 53-55 3.55:1 gears in a Corvette and sold for a sum of $46.95
Joe
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