I have an '06 GC with 48K that's been a dream vehicle, never had any problems. Last week the transmission light came on in the dash, so I checked the manual and it said to check the fluids. Did that, and added some to it but it wasn't too low. The light still comes on, but not always, it's intermittent, which makes me wonder if it's a good or bad thing, :) The van seems to shift fine. Is there possibly some internal sensor that triggers this light at a certain mileage so you know it's time to change the tranny fluids? Or is that wishful thinking! Also, I notice that the electronic display for the odometer, etc...flicker when the AC is running. Any thoughts on this? Thanks in advance for any help!
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Re: Transmission Light & Dashboard Flickering
Todays transmissions are something you really don't want to neglect, as it gets pretty expensive. Yes there are speed sensors, solenoids etc, that are electronically controlled, that can be causing that. Personally I would get it in to a dealer, and have it scanned & diagnosed a.s.a.p. to avoid making a small problem, a big problem. Is that powertrain not still under warranty?
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their are many problems with any vehicle and envoy/trailblazer[top seller ] have troubles some of the complaints were in the early 02 -03 the sun gear in transmission would crack some were the rear light panel corrosion problem a recall for some 06-07 in the northeastern area for drivers door circuit shorts due to cold weather road salts being able to seep past window and a few not many of the 02 trailblazers /envoys for an air bag module inspection last year recall for some 06-09 for a drivers headlight module the 05 had some for windshield sealant not fully cured their has not really been major problems with them but like with any vehicle the owner will either love them or hate them
A true manual transmission is exactly that and has no connection to the dash board instruments, other than the speed sensor, which doesn't control the gearbox, but supplies the engine's ECU and dashboard with the relevant vehicle speed information. I can't think of any related reason as to why you should have a related instrument issue and gearbox issue. I would recommend the obvious which is to take the vehicle to an experienced mechanic/technician.
Hello the wrench symbol could be a head light or signal bulb, or low fluid in the engine compartment you will have to really be most observant to pin point it.However check engine light will need to be tested with a OBD2 scan tool to retrieve your cars malfunction this usually cost from$25.00 up? plus the cost of parts and labour.It would only be guessing to try and begin to figure out what the engine fault would be without doing the OBD2 Engine scan hope this information was a help to you. Merry Christmas.
yes Mercedes changed the transmission service interval to 40k miles but then after that you don't have to service the transmission until you reach 140k miles. It is a good idea to the transmission serviced at this mileage especially for warranty purposes. There was a lot of issues with the new 722.9 transmission when it first came out. Which is one of the reasons Mercedes moved up the transmission service from 100k miles to 40k miles for the first time it needs to be serviced anyways. Plus if the transmission happens to need repairing the first thing the dealership will look for is to see if the trans service had been done at 40k miles before doing any kind of warranty work on the vehicle. As a former Mercedes Benz Tech at the dealership I would say yes it is necessary to get the trans serviced.
Regardless of what dealer tells you, there is no such thing as lifetime fluid. Even the best fluids such as synthetics should be changed. Change intervals should be regarded as false as well...If you changed all the fluids once a week your vehicle would last far longer than it does...Obviously this would take up a lot of time and $, but reasonably engine oil should be changed at at least 4,000miles, trans fluid every 25-30K. Otherwise the oil begins to chemically change loosing it's ability to do it's job and also carries fine contaminants with it that begin to wear components.