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Old 04-11-2012, 01:40 PM   #11
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Cheaper than a new truck change the rear end to 4:11 gears.. mileage will suffer a little but hey you are towing anyway.. if it is a 4x4 then make sure you change the front gears too..
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Old 04-11-2012, 06:14 PM   #12
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You can change the final gear ratio somewhat by buying a size smaller set of tires for the TV. Keeping out of OD is the way to go and an auxillary transmission cooler would also be good. A lot of towing has to do with driver expectations. If a newer TV is in your future a bigger engine would help. "There is no replacement for displacement".
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Old 04-11-2012, 07:57 PM   #13
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I have a 04 Tahoe 5.3L 3:73 w/ Factory Tow Package & Aux Trany Cooler. Although it isn't our primary TV we use is occasionally to tow our 26BH. Recently weighed ready to camp @ 6080lbs. The Tahoe isn't great but will certainly get up the Mts. On prolonged grades, specifically HWY 168 East of Fresno in the Sierra Natl Forrest, ~7% for about 9 miles...we have to drop to 2nd pull @ ~45mph 3300-3500 RPM. The Temps climb quickly, right to about 215-220 on warm days.

Remember you aren't just pulling your trailer, how full in the Tahoe. You get several adults and gear in the SUV too all together you are learning first hand the limitation of that particular TV.

FYI I have never seen prolonged 4K+ RPMs on my Tahoe.
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Old 04-11-2012, 10:56 PM   #14
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Originally Posted by Rustic Eagle View Post
One other consideration that may contribute to elevated tranny temps is the condition of the tranny fluid. TV's that tow often in mountain regions may rerquire the fluid to be changed more often then a TV that tows primarily on the flats. So I have to believe throwing in 7% to 12% grades on a regular basis must add to the fluid degradation as well.

Just thinking out load

Bob
Good point, I think I will have mine changed out soon.
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Old 04-12-2012, 11:19 AM   #15
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That is a good point on the gear change. And come to think of it, I do have bigger wheels on my Tahoe, they are 17" instead of the standard 16" So when I put the larger truck tires on them, that added a difference.
I wonder how easy it is to change out the gears and if it is worth it on a high milage SUV.
Clubhouse, thanks for chiming in on those details. Sounds like yours was very much the same as mine on the long steep grades. Do you have standard or aftermarket wheels? I was specifically climbing various grades on hwy 299 leaving from Nevada to the coast, its a nice road but very steep with hairpin turns and climbs to about 3000ft all slow speed. I had it in 2nd gear and it did okay but it was also 40 deg out side. Some of the grads coming back over and trying to avoid I-80, I was hitting the 4k rpm but I was also trying to maintain a speed.
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Old 04-12-2012, 09:21 PM   #16
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I have standard OEM 16" wheels.
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Old 04-20-2012, 06:22 PM   #17
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When I drove across Canada my unit was loaded heavy and we struggled through the mountains as well. I have to admit that I simply decided that I really didn't need to actually reach the speed limit of 100 or 110kmh if the hills wouldn't allow it. I found that the Envoy and trailer did quite fine maintaining about 80kmh in 3rd. That was fine by me, even on the worst of the hills. To make sure I wasn't a hindrance for other drivers, often I'd just slide behind a semi-truck and follow him up the hill. Now...to be fair we didn't have the high outside temps that you had to deal with, but we managed.
I've actually just returned from major service on the envoy - dealer mentioned that the transmission fluid was "black" (probably an exaggeration). Had it flushed & serviced and should be good-to-go. Transmission cooler is a must, as well...
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Old 04-20-2012, 09:35 PM   #18
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Originally Posted by azimuth551 View Post
That is a good point on the gear change. And come to think of it, I do have bigger wheels on my Tahoe, they are 17" instead of the standard 16" So when I put the larger truck tires on them, that added a difference.
I wonder how easy it is to change out the gears and if it is worth it on a high milage SUV.
Clubhouse, thanks for chiming in on those details. Sounds like yours was very much the same as mine on the long steep grades. Do you have standard or aftermarket wheels? I was specifically climbing various grades on hwy 299 leaving from Nevada to the coast, its a nice road but very steep with hairpin turns and climbs to about 3000ft all slow speed. I had it in 2nd gear and it did okay but it was also 40 deg out side. Some of the grads coming back over and trying to avoid I-80, I was hitting the 4k rpm but I was also trying to maintain a speed.
I've travel the same roads and there are curves and steep grades, you cant get a good start to get up the hills. I have had 6.9, 7.3( non turboed diesels) and a V10 gas. these were great on the flat and small hills but when it came to the mountain driving they were all under powered. You need torque to tow up the steep grades. just my opinion.
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Old 04-22-2012, 10:24 AM   #19
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Having black trani fluid can't be a good sign. You might be on your last miles with your transmission.
I am glad someone wrote in that has traveled the same roads and knows what I am talking about. Even with a V10, it still has limitations. I have decided on getting a Diesel truck, as my Tahoe already has 120K on it, its not worth modifying the gears because I still want to keep it and have a second vehicle to use and to use on those longer trips. Anything less than a diesel and I am just monkeying around. I also noticed coming back into the Reno area at the higher altitude I lost power, especially going up the mountains with a head wind--forget it!
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