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Old 01-08-2014, 02:31 PM   #1
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1973 27' Overlander
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Gear change

2003 Chevy 1500 Express Van,5.3L V8.,tow package. Am I wasting money on changing the rear end gearing to increase towing capability ? I think that I am at #6800 now, what can I gain ?
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Old 01-08-2014, 02:56 PM   #2
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First off, what is your current gearing? If you go to a lower gear (higher numerically), it may very we'll screw up the computer controlled functions like rich/lean and spark advance. I'd check with a performance oriented shop to see what your options are. If they say it's feasible, spend a couple of extra bucks to get some sort of posi-traction set up.
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Old 01-08-2014, 04:23 PM   #3
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1968 30' Sovereign
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gear

Quote:
Originally Posted by baylito99 View Post
2003 Chevy 1500 Express Van,5.3L V8.,tow package. Am I wasting money on changing the rear end gearing to increase towing capability ? I think that I am at #6800 now, what can I gain ?
Changing your gear ratio will not gain towing capacity. If you change your ratio it will change the torque applied to the rear wheels which will give you more power pulling hills and may even increase your gas milage slightly. cost will probably be in the $1000 to $1500 dollar range.Should be able to reflash comp. to take care of any issues with the gear change.
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Old 01-08-2014, 04:54 PM   #4
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Years ago, I had an old Chevy van and switched from regular 75-series tires to 60-series low profile tires, which is similar to changing to a higher numerical gear ratio in the rear-end. This resulted in constant, high engine RPMs, horrible fuel economy and engine overheating.

Your van is much newer, but you should be aware that changing rear-ends may cause unexpected results; and you'll have a lot more work to change the gears back if you aren't satisfied, compared to just switching back to the old tires.
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