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Ok, I posted before about how much the 3.42 gear sucks in my Tahoe because I tow my small enclosed trailer for work everyday. Well, I got feedback that I would be running around 2200 rpm with 4.10's at 65 vs. the 1600 or so I am running now. Especially around town in "D" the RPM's would drop below 1500 on a regular basis and I had NO POWER at all. What I have been doing this week is keeping it in "3" instead and the RPM's have been right in that "over 2000" range and the truck is pulling just fine, but I am going through more gas obviously.

So here is the question.......do I swap in 4.10's and then be able to drive around in "D" and have the RPM's where they should be or do I leave in the 3.42's and drive around in "3" and still have the low RPM when I am not towing. Need some feedback because I am on the fence on which to do.
 

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HOT AIR BALLOON OWNER
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Running @ 2k in the city v 1400rpm yields BETTER economy as the motor isn't lugging. Your thought process is reversed. Just quit using D/4th for the city, period. There's no reason to use OD in the city.

Your vehicle isn't built for fuel economy. I'd go 4.30-4.56:1 gears, you'll tow far easier and have increased city economy as the vehicle will accelerate easier. Freeway will be a wash.
 

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HOT AIR BALLOON OWNER
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Forgot to mention I am running the stock 16" wheels and tires.


So what? Ever thought of the curb weight of that Tahoe? Has to be close to 6000lbs in street trim w/ driver, tank of fuel, and 3rd row seats.
 

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4.10 should be perfect for a DD Tahoe. Heck I had 3.42 on my "light" rcsb and hated every minute with them, I can't imagine how people with heavier rigs can stand them.
 
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