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Old 08-29-2015, 04:02 PM   #11
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1. As mentioned, won't do a lot for you. A few times I have used 4Lo (transfer case) is when parking the trailer up on our mountain of boards (mountain of boards no longer needed due to bringing dirt in!) where we store it to level the trailer. I would use 4Lo to just be able to creep up the mountain without the need to give the truck much gas (accelerator). Very controllable that way. Not sure I have ever needed to do the same in the campground.
2.If it gives you more payload, then I say go for it! a 1500/150 truck/suv can and will run out of payload very quickly!
3. The factory brake controller is so integrated into the GM trucks it can not be added after the truck is built! It works so smooth, you can't even tell.
4. I towed ~7200lbs (last trailer) with a '10 Silverado 1500 4x4 CCSB 5.3/6spd/3.42. I may only be here in Mid-Mi towing (so far!) but I never felt a lack of power!!! Remember, you have a rolling brick behind you trying to cut through the air. Most of the time I stayed in 5th with a drop to 4th on bigger inclines. Couple big hills it was 3rd, 4th was ever so slightly dropping speed, but once in 3rd the truck picked right back up to 65-67ish and I could have kept accelerating beyond that speed if I wanted (actually saw 70 creep up before I realized! Lol).
5. As mentioned, don't consider the 4.8L. It would do the job, but be similar to what you have now climbing the hills. Don't think the 6.2L is available in the Tahoe, otherwise an even better choice at maybe 1-2mpg less than the 5.3L.
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Old 08-29-2015, 04:58 PM   #12
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Question on Tahoe as a Tow Vehicle

What do you tow your trailer with now? 3.42 axle and 5.3 (can't get 6.2) motor is limiting.... I love the look of tahoes but they are not towing much....
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Old 08-29-2015, 05:45 PM   #13
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What do you tow your trailer with now?
2007 4Runner 4.0L V6, 3.73 axle.

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Originally Posted by need-a-vacation View Post
Don't think the 6.2L is available in the Tahoe, otherwise an even better choice at maybe 1-2mpg less than the 5.3L.
I believe you're right, only the 5.3 in the years I'm looking at.
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Old 08-29-2015, 08:39 PM   #14
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2007 4Runner 4.0L V6, 3.73 axle.



I believe you're right, only the 5.3 in the years I'm looking at.

Well the Tahoe will definitely be a step up over a 4Runner. My dad has a 4Runner and they are nice but won't out tow a Tahoe...
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Old 08-30-2015, 12:58 AM   #15
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I have a 99 Suburban with the 3.73 and 5.7L engine and tow mine just fine with 3 people and about 200 pounds of scuba gear (for 2) in the cargo area. Fully loaded my trailer weighs about 3100 pounds. However my pinion bearing decided to give out last week. Its only got 256,000 miles on it. Currently its apart in my neighbors shop from our inspection to see just what gave. I'm replacing all the bearings and I am giving a lot of thought to upgrading the gear to the 4.10. Can't make up my mind. Gear will cost about 200 bucks and gas mileage will suffer even more but I will have really good torque. Do I need it? Not really. Do i want it? Yeah! You can never have too much torque and power when towing. Tahoes and Burbs are basically the same vehicles under the paint. The 3.73 has good torque. I can't speak for the 3.43, but I would think the 3.08 is a little weak. I think that particular setup is geared for daily driving by soccer moms. My vehicle does great towing 5-6000 pound stuff and toting a family and gear. You can't fill the Suburban. You'll over load the weight before you run out of space. My 99 has a 6500lbs tow capacity, and I think the newer ones have increased to around 8 or so???? That will tow a lot of different trailers on the market and won't even know yours is behind it. When looking at an SUV for a tow vehicle I gave a lot of thought into the family room and cargo I would be keeping in the vehicle. Kind of hard to tote bikes in (it can be done) but its great for scuba gear and other such things that I like to keep locked up and dry (groceries). Also it has a pretty big roof rack for kayaks, bikes, luggage box, etc. I'd rather have a vehicle over powered for what I use it for than one just getting by. I did that with my Escape. It pulled it, but it worked really hard to do it.
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Old 08-30-2015, 07:18 AM   #16
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Do the math to figure out your change in top gear RPM at highway speed. I think you'll find that the 4.11 is waaaay to much and will hurt fuel mileage a lot. I have not used this particular calculator but there are others too. In the 60s and 70s drag racers used gears like this or higher numerically to get the car off the line and reduce wheel spin on cars with bigger power, but driving them around would have the car in top gear when other cars were still in 3rd gear.

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Old 08-30-2015, 04:28 PM   #17
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Do the math to figure out your change in top gear RPM at highway speed. I think you'll find that the 4.11 is waaaay to much and will hurt fuel mileage a lot. I have not used this particular calculator but there are others too. In the 60s and 70s drag racers used gears like this or higher numerically to get the car off the line and reduce wheel spin on cars with bigger power, but driving them around would have the car in top gear when other cars were still in 3rd gear.

MOTOR - A Rear Axle Calculator
3.73's to 4.10's is not that big of a jump.I would be willing to bet in 99, options were 3.73's or 4.10's. My cousins 99 Silverado 1500 has factory 4.10's.
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Old 08-30-2015, 05:08 PM   #18
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3.73's to 4.10's is not that big of a jump......snip
I would tend to agree with the older GM 4-speed transmissions (like my '02' 4-speed/4.10).

Thinking out-loud here...., I would think with the newer GM 6-speed transmissions a 3.73 gear would be plenty deep, possibly under some shifting conditions even similar (output ratio) to the old 4-speed/4.10.

Bob
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Old 08-30-2015, 07:43 PM   #19
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I would tend to agree with the older GM 4-speed transmissions (like my '02' 4-speed/4.10).

Thinking out-loud here...., I would think with the newer GM 6-speed transmissions a 3.73 gear would be plenty deep, possibly under some shifting conditions even similar (output ratio) to the old 4-speed/4.10.

Bob
I agree with you the 99 suburban is a 4 speed

The newer 6 speeds don't need as low of gears but in pulling conditions 3:73's would be nice.However gm did away with 3:73's in there 1/2 tons unless you get one with a 6.0 vortec max or 6.2 max trailering package.Im unsure on gearing as far as the 15+ body styles goes.

The 3/4 tons and 1 tons with the 6.0 had options for 3:73's or 4:10's.
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Old 08-30-2015, 09:44 PM   #20
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Well I talked with a differential guy today. This guy knows gears and such. I have the 4 speed tranny. He told me the 3.73 is plenty of gear to haul what I haul and a 4.11 would only increase my fuel consumption. I wouldn't gain enough to offset it. I Don't know about the New stuff. So I'm keeping my 3.73. He was also of the opinion that 3.73 was the best all around gear for these vehicles. Decent gas mileage with decent power. A really good compromise and he wouldn't go either way if installing a New one. He'd keep the 3.73.
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