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Old 07-04-2013, 04:02 PM   #11
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Thanks. 4x2, which makes life easier. I have a programmer on my truck that I can use to tweak the lock point if necessary. Watched the video again today of how to change it out. Feeling more confident about a DIY project. Just need to leave PLENTY of time. I'd just be really ticked if I changed it and got a whine :-(
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Old 07-04-2013, 07:46 PM   #12
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Personally I would not mess with changing out gears, rather put that money in savings for future down payment on larger truck built to handle the load properly
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Old 07-07-2013, 11:59 PM   #13
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Well, after talking to a couple of mechanic friends I've decided not to pursue a gear swap. It seems that the benefit is not great enough to warrant the expense. No need to dig into a perfectly good 3.55 diff:-)

I am thinking about something like the Firestone Ride Rite air bags to help out my WDH. It would be nice to not have as much tension on the bars. Experiences with the Ride Rite or similar?
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Old 07-12-2013, 03:02 PM   #14
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I had a 07 silverado 1500 with a 5.3. The truck came with 3.73 gears and I installed 4.10 and I went from 13.5 average mpg to 15mpg! and it def towed better!! I truck seemed to lag through each shift with the 3.73s with the 4.10s it felt better and went through each gear much better and the motor was not lugging as much if that makes sense, plus I could tow 1000lbs more with the 4.10s
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Old 07-13-2013, 12:30 AM   #15
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Good to hear. I've pretty much talked myself out of it for the time being, but maybe sometime down the road. Did you do it yourself, or pay a shop? How much did it wind up costing you?
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Old 07-13-2013, 09:07 AM   #16
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I paid a shop to do it, my truck was a 4x4 and it was around 1,300 for both diffs, all new bearings and synthetic fluid, I also bought a hypertech programmer to fix the speedometer plus I wanted one anyway. I towed my new whitehawk 27dsrl with it twice and it towed pretty well but the tranny temps were between 170 and 200 so I ordered a secondary tranny cooler to go with the factory one, I took my truck in to the dealer for service and left with a 2011 2500hd with a duramax lol ( wife was thrilled) but once I towed with the new truck I was amazed how well the 2500 handled the load and that diesel is amazing! I don't even know the camper is behind me anymore
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Old 07-13-2013, 01:17 PM   #17
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Thoughts on gear ratio

I don't know what axle is in your truck but if you do it yourself the use of setup bearings will really help save you a lot of effort.

Buy an extra set of bearings and gently grind the ID until they press on by hand. With the right bit it takes about 5 minutes per bearing.

Do your shim setup with these then press on the unaltered bearings when you have a good pattern. Avoids risking damage to a new bearing. Bearings are very precise one to the next so the pattern won't change.
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Old 07-13-2013, 02:11 PM   #18
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Quote:
Originally Posted by tmsbandman View Post
Yeah. Not happening in the forseeable future, anyway. I'm not sure I have the guts to tackle it, and it's an 8 labor hr job I can't afford. Thanks for the advice. Might not be worth it if I can't use OD. Engine would tach pretty high in 3rd with 4.10.
The reason you shouldn't use overdrive has nothing to do with overdrive itself. The problem is it makes the gearing to tall. If you installed 4.1 gears that would shorten the gearing to the point where you could use all your gears.... and more gears is better.

I have an Expedition with a 5.4 and 3.73 gears. At 60 mph it's turning over around 1800 rpm which is great when running empty but too low when towing my trailer. If I leave the OD off it's around 2500 which is great for torque and tows with ease. Downside is it's now just a 3 speed auto. 4.1 gears would bump the rpm to around 2100 at 60 in OD which means I could use it on the hwy.

My truck is a 4wd though which doubles the cost of changing gears and my trailer is lighter so for me it's not worth the effort. In your case it might be.
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