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SUVs Toyota Highlander Toyota Highlander Transmission Problems
230 messages, Last post on Dec 01, 2009 at 9:52 AM
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Replying to: alotawatts (Aug 26, 2009 11:47 pm) Prior to the somewhat "final" solution of using E-throttle, introduced with the RX330, to "protect the drive train" they seem to have come up with a interim solution that resulted in localized (most likely "local" to the gear type ATF pump) heating of the fluid. In order to alleviate at least some of the degradation of the ATF from overheating the external cooler was made "standard". |
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Hey there, I have an 04 Highlander that is leaking transmission fluid from a faulty seal at the right side of the transfer case. Apparently this is a known issue with the 04-06 Highlander and Sienna. I feel like I am getting screwed as the production date of my vehicle was June 24 and it is now October 8 and therefore my power train warranty has expired (by a whole 3 months). I only have 53k in miles and all service has been kept up to date. Any suggestions on what to do or am I going to have to eat this one (about $1500)?  Thanks |
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I recently had my engine replaced in my 2003 HL and within 10 miles, the lower gears would start "jerking." It is fine when engine is cold (which isn't long). Tranny fluid replaced. Toyota service (not where I had work done) says that I should drive the car for awhile (months) to "reprogram the transmission to my driving patterns." What kind of "driving patterns" have to be programmed for a car to "learn" how to go from 1st gear to 4th gear? Any thoughts?
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Replying to: fixrixsix (Oct 08, 2009 7:47 am) But the newly restored engine POWER/TORQUE might. So Toyota might be correct. OUCH, that HURT...!! |
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Replying to: paul143 (Sep 22, 2009 4:13 pm)
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Replying to: casandraw (Oct 11, 2009 8:01 am) Have you come up with anything???
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Replying to: minnesnowta1 (Oct 12, 2009 5:03 pm) It appears that as a result they have been overly cautious about the issue of more closely controlling ATF line pressure, ALL aspects of line pressure. The goal seems to be constantly keeping the line pressure as low as seeming possibly in order to reduce the ATF heating due to pressurization to the n'th degree. So I find it not surprising that some of you are getting clutch "chatter", shuttering, once you reach roadspeeds that dictate the use of higher gears ratios. Higher gear ratios reduce the need for high line pressure so my guess would that Toyota, yet again, is cutting things just a tad too close. That makes it all the harder for me to understand just why the solution Ford took for solving the exact same problem in the Edge transaxle design was not acceptable to Toyota. |
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Replying to: casandraw (Oct 11, 2009 8:01 am) |
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Replying to: fixrixsix (Oct 13, 2009 7:18 am) They might replace one of the pressure controlling solenoids which may solve your problem until the engine/transaxle ECU completes the (re)learning process for the new solenoid and then begins to optimize FE again. The engine/transaxle controlling ECU must get a "mind-wipe", go back to the factory default, rolling off the production line, parametric mapping, any time a new component of this class is installed. It might be wise, worthwhile, to know which solenoid they replace that you can later do a mod, provide a biasing current, should the condition return.
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