Hyundai Trajet Automatic Transmission problem

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My Hyundai Trajet 2.7 v6 automatic gearbox is slipping between gears. It has 230000 kms on the clock. I have no idea if and when last the ATF was changed as I bought it used no FSH. Fluid is slightly brown. Im thinking of doing an ATF oil change before having it checked at the agants or specialist shop. Am I wasting money doing this anybody got some thought on it
 
Possible three things.Defective input or output speed sensors or TP sensor.Pretty common.Before do anything please check Any DTC's current or history set in the PCM.
 
Hi Mate.
If you have a OBD scaning tool then you can do it.But better take the vehicle to the local garage and ask them to check the trouble codes.Also PRNDL switch also a common problem in your model.(With out checking the codes we are just guessing here.)
Complete ATF change also a good idea.
Cheers.
Bob.
 
Thanks for suggestions have contacted a Hyundai approved repairer who suggested I bring the vehicle in. I subsequently found fluid level a bit low and asked what fluid to use just to top up. I was told Castrol Transmax Z which is green and not red like normal ATF. Manual says to use SP111 which I cant find. Hyundai Dealership also uses the Transmax Z. Any thoughts on the Transmax Z.
 
Originally Posted By: Dave1944
My Hyundai Trajet 2.7 v6 automatic gearbox is slipping between gears.


What model year? If it's a 4spd auto, it's most likely an F4A51 trans. These transmissions require an ATF suitable for Hyundai/Kia SPIII use. They're easy to service. There's a bottom mounted drain plug and you add new fluid through the dipstick tube. I'd first try a drain/fill to see if that helps.

Some of the early models (2001, maybe 2002) had a top mounted spin-on trans filter. If there's no external filter, there's nothing else to service. There's an internal filter that requires removal of the valve body to replace.

Also- do the PRNDL lights on the dash, coincide with the floor shifter? If not, there could be range/mode sensor issues that could cause shifting issues. That's a fairly easy repair to replace the sensor.

Joel
 
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IT IS A 2005 MODEL 4 FOREWARD SPEED AUTOMATIC BOX, INCLUDING THE OVERDRIVE. BOTH HYUNDAI AGENT AND HYUNDAI APPROVED BOX REPAIRER USE CASTROL TRANSMAX Z. I DONT BELIEVE THE GEARBOX IS SLIPPING BECAUSE WHEN ACCELERATING THE BOX SHIFTS EFFORTLESSLY. ONLY WHEN DECELERATING OR COASTING THE BOX CHANGES TO LOWER GEAR PREMATURELY SO WHEN YOU ACCELERATE AGAIN IT IS WRONG GEAR. AM TRYING TO AVOID EXPENSIVE "STRIP & QUOTE" SO AM TAKING IT FOR COMPUTER DIAGNOCTIC CHECKS TO SEE IF IT IS SPEED CENSORS OR SOMETHING ELSE ELECTRONIC
 
Possible vehicle speed sensor (VSS) problem?

Like said, the F4A51 will set it's own diagnostic codes, but if one is set, your check engine light will usually be lit to show this.

Joel
 
Hi Joe, my Trajet does not appear to have a check engine light is this normal. Anyway I had the diagnostics checked and a PO120 (Throttel Position Sensor)DTC came up. Technician at the Hyundai approved repair centre maintains this could be the problem. They are now wiating for a replacement part. Will do a ATF flush and refill at same time. Once again they confirmed they use Castrol TRansmax Z. As approved repairer they should know what to use.
 
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Good deal!

TPS problems are fairly common on the Hyundai 2.7 and 3.3L. If yours has electronic throttle control, I'm surprised you've never been left in 'reduced power mode' when the TPS acts up. That's the typical result. You'll get just enough throttle control to get off the road.

Joel
 
Hi still the problem persists. They replaced the TPS sensor and after test driving the DTC still showed the TPS sensor with a fault plus a few others. After spending a week at the gearbox "Experts" with only a list of faults to be attended to by Hyundai, the vehicle was taken to Hyundai. After another week of fiddling with the electrics, cleaning connections etc I was told no more error codes were found. The problem has still not been resolved so its going back on Friday. I give up!
 
Hi Dave, hope you've managed to overcome your transmission problem.

I bought my 2nd hand 2007 Trajet 2.7 in January this year and when booking for the 120k service I got a quote for what is in essence a lube service with R2097 just for the transmission fluid. Not wnating to patrt with hard earned cash in these times I've bene investigating and hopw you have some infor available - is your agent still recommending Castrol Transmax Z? I called Castrol helpline and they advised that the Trajet transmission oil used is their Diamond ATF SP2 product which is not available locally and Hyundai could be directly importing the stuff (which could explain the high cost).

I'd really like to get some clarity on whether an alternate fluid can be used as the cost from the service centre is too high.
 
Success at last. After a month of pro9blems the problem has gone away. The TPS was replaced by Hyundai all other sensors checked and terminals cleaned and all seems great. Thanks to all for the advice.

I now want to do the oil change and dont want to use the Castrol Transmax Z agents want to use. Have sourced Mitsubishi diaQueen SP 111 Atf. My owners manual says Mitsubishi Diamond SP 111 ATF. Anybody know if there is a difference between Diamond SP 111 and diaQueen SP 111. As they are both SP 111 I assume its ok to use.
 
Pveenen, great to find another South African to talk to. I got the same quote from my dealership and refuse to pay R250 per litre for Castrol Transmax Z which is not I am told an SP 111 equivalent. I have phoned around and found that Mitsubishi sell diaQueen SP 111 ATF in 4 litre tins for R270. You need 8 litres so it will cost you R540 for 8 litres. My Trajet owners manual specifies Hyunda SP 111 or Mitsubishi Diamond SP 111 but the Mitsubishi ATF is the only one I can find that staes SP 111 on the tin. I am trying to find out if the diaQueen SP111 and Diamond SP111 are the same. see my latest post. Hope this helps. Cheers
 
In a previous post it was mentioned that the PRND switch is also a common problem on the Trajet. Sometimes in morning I engage D the light does not come on and gear does not engage at all. I engage 2 and the gearbox engages but will not move into 3rd gear. After I have driven a few kms slowly in 2 I can stop engage D and all is back to normal. Any idea how to sort this out.
 
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