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Old 02-01-2010, 07:48 AM
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gears and 37s

i have been thinking about putting a 6 inch lift with 37s on my truck. is it necessary to swap out the gears to something a bit lower, or are 37s ok to run with a 3.73 gear. thanks
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Old 02-01-2010, 07:59 AM
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Not necessary if you don't tow a big load often. I'm running 37's with the 3.73's and it feels fine. Not a big differance between stock tires. 4.30's would put you back to stock tire/gear ratio. If you tow a bit I'd recommend a gear change for your tranny's sake.
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Old 02-01-2010, 08:00 AM
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You would be ahead to swap to 4.30 gears, even if you don't tow. Keeping 3.73s will hurt your in-town mileage and put more stress on the transmission.
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Old 02-01-2010, 08:24 AM
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i was just gonna see what everyone thought. i have heard that 37s are as big as you want to go without gears, but then again ive heard that you need lower gearing with 37s. im on the fence about it.
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Old 02-01-2010, 08:27 AM
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I run 4.30s with 35s
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Old 02-01-2010, 08:44 AM
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With a stock 31 in. tire going 55 your rpm's would be 1556. Put 37's on and they'll drop to 1304. 37's and 4:30's you'd be at 1503. At over a 250 rpm drop you are putting a big strain on your transmission. Towing would really hurt ya....
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Old 02-01-2010, 08:47 AM
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def regear.... without it your putting extra stress on your trans on top of it not shifting where it should....
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Old 02-01-2010, 09:19 AM
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hey topdawg, let me first just say that i love your truck, im kinda using it as a template for my truck (hope you dont mind). would i need to swap both front and back gears, or can i get away with just the backs. what would a price be on a gear swap?
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Old 02-01-2010, 09:42 AM
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Quote:
Originally Posted by jstokes1987 View Post
hey topdawg, let me first just say that i love your truck, im kinda using it as a template for my truck (hope you dont mind). would i need to swap both front and back gears, or can i get away with just the backs. what would a price be on a gear swap?
you can do the rear only if you never plan on using 4wd... if not you have to do both... gears and master install kits your looking at about 700 bucks... install is anywhere from 250-500 per axle depending on where you go... generally you should set aside about 1500-2k for a gear swap
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Old 02-01-2010, 09:51 AM
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Yes you can do the backs and not the fronts at the same time. Only thing is you want have 4 wheel drive or should I say you will, but just don't use it. I actually went this route because at the time I couldn't afford to do it all at once. Here locally everyone seems to charge $250 labor wise plus parts. I think for the rears I paid $300 for the gears, $150 for the install kit and $250 for the install. Front was about the same, except I had my ball joints done which cost me $50 more.

I think it's cool you use my truck as a template. I do the same thing with some other trucks I've seen on the forum. I take what I like and taylor it to how it would fit me. If you have anymore questions let me know...
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