My 1999 Tiburon starts in 1st gear and goes smoothly to 2&3 when cold but not into overdrive. After trans warms up it will start only in 2nd gear and still will not go into 4th(overdrive). Also overdrive light will not come on. I have replaced fluid and filter but it had no effect. Thank You
I would check into the Trans oil temp sensor,they are known to keep the trans from shifting into 4th gear if they have a open or a shorted circuit...This may also be the culprit for the other issues you are experiencing when the trans is at diff temps and doing diff things....The other thing that is known for going bad in that Transaxle is the Sunshell...The splines on the inside of the sunshell strip out and than you will lose pretty much all forward gears,Except for 1st gear most likely and you will also lose Reverse if the Sunshell goes bad...But this will not act any different if the temperature is cold or hot
SOURCE: I bought a 2000 Hyundai
The input and output transmission sensors may be bad. My car had this malfunction. I replaced the sensors and have had no more problems.
SOURCE: 2001 HYUNDIA ELANTRA AUTO TRANS THE TRANS
You really need a test drive by a tech. Any shop should be able to do that and give you a firm (written) estimate. It might not be a big deal. Shop around if you need a rebuild, If you need one, ask about their warranty. Believe it or not, a good reference for a tranny shop is the Used Car Manager at the Hyundai dealership. Go in to ask him, not over the phone, and be nice. You're asking for a favor after all. Many dealers do a lot of their work outside the store for reasons of cost. It all depends on the dealership. One will, one won't. Ask.
SOURCE: my 2002 Hyundai Accent goes into 1 gear smoothly,
CHECK ENGINE light??? Whenever the 'CHECK ENGINE' (Service Engine Soon) light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE the problem and perhaps eventually fix the problem.
SOURCE: auto trans shifter shifts p-r-n-d-2-1
There must have been a 'Check Engine' Light? When a 'check engine light' (MIL=Malfunction Indicator Lamp) is turned on, there is a DTC (Diagnostic Trouble Code) set/stored in the ECM/PCM (Engine Control Module/Powertrain Control Module). This code identifies which engine management system component/function experienced a malfunction. Once you pull/read this code, you may begin diagnosis. You'll need an OBDII (On-Board Diagnostics II) code reader. You should find a P07?? number stored (P07??... is a transmission code).
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