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Pickups Toyota Tacoma Toyota Tacoma Transmission Problems
320 messages, Last post on Nov 22, 2009 at 9:39 PM
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I have been reading different posts and was suprised to hear other people having the same problem as me. I have a 06 double cab tacoma 4x4. Ever since I got it a weird humming noise would appear around 30 mph and go away at 40 mph. It wouldnt do this all the time, it might happen one day and wouldnt show up again for a couple days later. I finally took it into the dealer with around 2500 miles on it. I took it for a drive with the mechanic and he heard it, so we drove around trying to figure out what it could be. He asked if it did it in four wheel drive, I said I have never tried it. So we waited for the humming noise to show up, and once it did I popped it in to 4WD, and the noise instantly went away. We tried it a couple times and every time it went away. So now I have to take it in later this week and they are going to troubleshoot more and hopefully fix the problem. Well I just wanted to hear from you guys if you had the same problem and what the outcome of your experiance was?
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I have a 2006 Tacoma 4 door, V6, auto trans. I live at 8700ft elevation. Closest towns are at 7200ft (12 miles, steep grade), and 6000ft (40 miles moderate to shallow grade). Speed limit is 75MPH. My problem happens when cruise control is engaged. Coming up the steep grade it shifts down as expected most the time, but some times will go down 2 gears, which is not nessary. On the moderate grade it will hunt between clutch locked OD (or 5th), clutch open OD, and 4th with the clutch locked or open. Eventually it will usually stay in 4th for most of the climb (which is my understanding of the "logic" of the programing for the transmission). Head winds have a noticeable effect but for the sake of this discussion let's assume they are constant and light. When I don't use the cruise control and man the throttle myself, there is only one short hill that the trans. shifts down to 4th, all the rest of the way I can keep it at 75mph + or - 3mph without it shifting down to 4th. (It does unlock the clutch a couple of times.) So the question is: Is it possible to re program the computer that controls/senses transmission and engine parameters so it will have: 1. a larger throttle opening before shifting down. When it shifts down there is still at least 1/3 of throttle travel left. (Full throttle opening/manifold pressure at 7000ft is roughly equal to 2/3rds at sea level.) 2. and/or accept a 5mph sag in set speed before shifting down. 40 miles in a lower than nessary gear is a significant fuel effiency issue. Coming home from work it is irritating to not be able to use the cruise control. Any input from some of you engine management computer guys would be appreciated. Thanks for your efforts, VStrom1 |
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Replying to: vstrom1 (Sep 29, 2006 6:03 pm) |
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Replying to: vstrom1 (Sep 29, 2006 6:03 pm)
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Replying to: beach_brada (Sep 30, 2006 9:19 pm) You know how I might overcome the Tacoma squeaking clutch pedal that drives me crazy in damp/ rainy weather. All summer long, with low humidity, there is silence, but now that its begun to be cooler and damp, the squeaking is back! Its done this for years. Walt |
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My 05 prerunner w/5spd has a ticking noise from the trans. It stops when the clutch is lightly engaged. The dealer has changed the clutch asmbly. I changed trans to royal purple. It's better but it's still there. |
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I have a 2005 tacoma 4.0 L DoubleCab with an automatic transmission, with 20K miles. While attempting to change my oil (for my first time with this vehicle) in the dark something I highly recommend you never do, especially with a new vehicle!), I inadvertently loosened the auto-transmission fluid bolt (funny same size 14mm too). Well needless to say, after the first few seconds observing Toyota's "amazing red" come pouring out, I was slightly panicked. In my haste, i dropped the bolt and let about 1-2 cups (as in measuring cups...not sure exactly, but the bolt was out for about 5 seconds). ANYWAY, I purchased a quart of fluid from a local dealer (yikes! $25/qt)but am just now finding out that there is no dipstick to check just how much i lost, and how much to replace (which brings me to another problem) Can I safely drive without adding the fluid? Will I need a complete auto-trans fluid change? Can Toyota, any knowledgeable mechanic, or me and my "lacking auto" skills bring it back to normal??? Please help me forget the error of my ways!
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Replying to: jetsjam (Dec 12, 2006 5:41 pm)
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I accidentally unscrewed the transmission fluid drain plug while doing an oil change & lost some tranny fluid.... 2 questions: (1) Can I pour replacement automatic transmission fluid down the tranny dipstick tube? (2) Is there a specific kind of auto. trans. fluid for the 2006 Tacoma?
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