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SUVs Chevrolet Suburban & Tahoe 2007 and newer Chevrolet Tahoe and GMC Yukon
3119 messages, Last post on May 27, 2009 at 2:44 PM
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Replying to: dieselone (Oct 20, 2005 10:41 pm) How did we ever survive with 3 speed trannys? Just a theory since I really don't know the answer, but maybe a 4 speed is better in the long run? I'm thinking this because excessive shifting causes heat that helps kill a tranny. Wouldn't a 5 speed shift much more than a 4 when under a heavy load? More torque and more HP? Goosh 170hp was enough for my old 1991 S-15 Jimmy (4700lbs)
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Replying to: jay_24 (Oct 21, 2005 6:53 am) Basically when I'm towing my boat with my Suburban I only have 3 speeds to use. Can't use o/d when towing, engine doesn't have enough torque  2000rpm to pull a 5000lb boat 70mph (not to mention I've already replaced one trans, I don't want to replace another by using o/d). So I tow in 3rd 65mph spinning around 2500rpm or so, pulling up anything more than a minor grade requires 2nd gear and 4000+ rpm. The trucks were lighter and so where the towed loads years ago. Also, if you look at many of the engines in the 70's and 80's, they developed torque & hp at low rpm. GMs current line of small block v8s develop peak torque 4000 rpm & peak HP at 5000 rpm. Additional gears help keep the engine in the powerband w/o to much of a drop in rpm between gears. That's a problem when trying to tow up hills. The average new trailered boat is around 20' and weighs close to 5,000lbs. 20 years ago the avg was around 17'-18' and probably didn't weigh much more than 3000lbs. I'd say the same holds true with campers as well. I guess we all have bigger houses and bigger toys. |
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....or does the new "07 Denali look like a new character on the Bob the Builder kids show? http://www.autoweek.com/files/specials/galleries/yukon/pages/01.htm
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Replying to: truckbuff (Oct 21, 2005 8:07 am) How did we ever survive with 3 speed trannys? " I never had any power/performance problem years ago with my 3-speed cars when they had 403 or 427 cid in them. More gears provide better fuel econmy for sure but at the expsense of more complexed trans which requires more services. Most older 3-speed cars never needed to change trans fluid during normal life span whereas a lot of newer cars now require perioidic change of trans fluid. I personally dont mind having 5 or 6 speed in a new car. I just dont want to pay for any additional maintaince costs due to having more gears.
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Replying to: ahightower (Oct 19, 2005 11:16 am) Absoultely. Also, I dont know what others think. But I feel the front bumper is really extending too low which not only reduces the ground clearance but also blurs the line betten a SUV and a van. To me this is a very serious product image mistake. GM is making big buck on full size suvs. The last thing they should do is to make their suvs look like a van and kill the cash cow. |
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Replying to: 4rider (Oct 21, 2005 2:38 pm) Modern transmissions are made of lighter materials than they were 20+ years ago, but that isn't the biggest reason modern transmissions need frequent fluid changes. 2 reasons modern cars need frequent fluid changes, but mainly one. The trans. fluids today aren't as good as the fluids used 25+ years ago and today's engines run hotter allowing hotter trans temps as well. Don't laugh, but up until 20-25 years ago trans fluids used whale oil, which is one of the best natural lubricant as far natural ability to not break down under heat. Once international bans/limits on whaling were implemented whale oil could no longer be used for trans fluid and other lubricants. I'm sure many may be falling of their chairs but look it up, it's well documented. |
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Now that I've seen the 2007 Tahoe with the wrappers off, I must say that I'm dissappointed. Back in 1997 when Ford introduced it's new line of F-150's, both the styling and choice of engines was revolutionary for a full-size domestic pickup. Result: Ford continues to dominate this market. Back in 1994 when Dodge updated is hopelessly long-in-tooth Ram, the styling was a revolution, and while still solidly in third place Dodge took a huge bite out of the market share of both GM and Ford. The new GM's will maintain the status quo, nothing more. GM is the undisputed master of pushrod technology, but most other manufacturers have moved on. The new styling while not offensive will not win many new converts. GM has checked their bet when they should have moved all in and done something truly special.
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This reiterates my point earlier that this new vehicle is now competitive, and it is much ado about not much. Judging from such recent introductions as the Malibu, Impala, the Colorado, and now the Tahoe, something "truly special" maybe beyond their collective abilities. GM is not Toyota, their public image is rock-bottom, and a decent car is not nearly good enough right now. They need to put as much effort and money into their vehicle's designs as they do their incentives. It's like watching a football team use a "Prevent" defense. Trying not to lose hastens your demise considerably. GM doesn't have the luxury of producing another mediocre new model. DrFill |
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Replying to: quikkash (Oct 23, 2005 8:55 am) The combined sales of the Chevy Silverado and GMC Sierra are a bit higher than the Ford F-series. Data is from a competing website, through May of 2005: 1. Ford F-Series pickup — 335,269 2. Chevy Silverado C/K pickup — 274,869 14. GMC Sierra pickup — 87,210 GM's advantage is 26,810 units. Maybe GM ought to do away with the GMC division and take over bragging rights for best seller. Plus, you might say the Avalanche and even Escalade EXT are bought to be used as "trucks", and share pretty much the same mechanicals. GM is clearly preferred by consumers. I don't have the numbers, but I'm pretty certain the GM full-size SUVS far outsell the Fords as well. Chalk one up for old school engineering.
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Replying to: ahightower (Oct 23, 2005 1:28 pm) Ford only has the Expedition and Navigator. Excursion never sold well and has been dropped. |
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