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Need Used Gm 3.23 Gears For 02 1500

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Babyhauler Enthusiast

Babyhauler

Posted
Posted

I am looking for a used set of GM 3.23 gears for my 02 1500 2wd EC 5.3.

I use my truck in my sales job and I know the 3.23s will increase my mileage. Stock gears are 3.73. ~2000 rpm at 70. It will hurt take off and pulling but I will have to live with it. I know, I know. We had this set up at a previous employer and they reached 20 mpg regularly. I avg close to 16 thru the winter and the hot weather mileage has been 14-15. I record every tank and usually burn Chevron fuel. Mobil 1 oil changes at about 5000 miles. Michelin LTX at 44 psi. Speed limit most of the time and a lot of drafting. A car would be best but the cost, ins, parking, etc do not add up now.

Thanks

jro909 Senior Enthusiast

jro909

Posted
Posted

dude i can get 20mpg out of my 3.42s rolling on agressive tread its all about hitting the sweet spot on the speedo...50mph is good, cruise control..driving with the a/c off little things add up

76LQ9TA Enthusiast

76LQ9TA

Posted
Posted

Which rear axle is in your truck? I have a set of low mileage 3.23 and 3.42 gears out of a 10 bolt 8.5/8.6 differential. $80 each + shipping. These are original GM gears. PM your email address to me and I can send pictures. The 3.23 gear set has 70,000 miles on it and the 3.42 is under 30,000 miles.

  • 3 weeks later...
wavery Enthusiast

wavery

Posted
Posted
jeff,

 

PM sent... I think.

 

I want to change my 3.23's to 3.73's for towing. If you are interested in a swap, let me know. I only use my truck for towing our 4,000# Pop-up trailer. Depending on where you live, we could arrange a swap. I live in Beverly Hills.

 

I will have to check on the size & bolt pattern of the rear-end on my '06 1500. It has 32K on it. I have had it for 2 years and towed about 5K with it..... no issues.

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