QuestionHT,
I did go to the dealership and they are the ones that told me I needed a new transmission. They wanted $2350. to put in a remalufacture transmission. Now if it is a throttle switch like you stated or a sensor, shouldn't they have caught this during their test. As stated earlier, the dealership had it twice. First they changed the pulse generator and flushed the system and the second time is when they informed me the transmission needed replaced. Now AAMCO is telling me after rebuilding the transmission it is still doing the same thing but not as severe. Please help. Thanks Tom
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The text above is a follow-up to ...
-----Question-----
Have 83,000 miles on my 2000 Elantra, and after driving on the highway when coming to a stop at speed of 5-0 mph the car jerks when downshifting. It feels like being rear ended. Took it to hyundai dealership and was told transmission needed replaced after having transmission flushed and new pulse generator put on. Trouble code 1634 and 734. Took it to AAMCO and they did a diagnostic check and said 4th gear was out. Had AAMCO rebuild the transmission and its still doing the same thing. Please help because I have invested over $2700. into this problem
Thanks Tom
-----Answer-----
You'll need someone with a scan tool capable of reading Hyundai transmission and engine data. The condition you describe can occur if the throttle position sensor is malfunctioning. In the engine data screen, the value for the idle switch should be monitored. If the idle switch reads "off" when you come to a stop, that means the computer thinks you have your foot on the gas and it will abnormally shift into first gear.
If the idle switch reads "on" while the condition is occurring, the problem is within the transmission and
AAMCO should be willing to repair it under their warranty.
In the future, I'd recommend you check with the local Hyundai dealer prior to doing major transmission work. In the dealer where I work, you could have a factory remanufactured transmission installed in your car for about $1900 to $2000, and we're on the higher end of the dealer pricing scale.
AnswerIf the dealer did their tests properly, they should have caught any idle switch or throttle position sensor issues. In fact, on the dealer diagnostic sheet, there is a space listed specifically for the results of testing the idle switch.
I also left out improper fluid level as a possible cause. If the transmission is significantly over- or under-filled, it can cause some abnormal things to occur. Fluid level and condition are also part of the dealer transmission diagnostic sheet.
Since AAMCO has rebuilt the transmission and you're still having the same issue, I think AAMCO needs to step up to the plate and do what's necessary to fix the problem. Since AAMCO admits that it's still doing the same thing (although not as severely), they should be willing to provide you warranty service to correct it. If they are not, you should begin moving up the AAMCO customer assistance chain.
At this point, since AAMCO is the one that has rebuilt your transmissions, they're the only ones that can provide assistance on your repairs. If you were to bring this do the dealer (again presuming it's not an idle switch issue), they'd quote you a price on replacing the transmission.
If the dealer wanted significantly more than AAMCO for comparable repairs, I can see why you went to AAMCO. I had mistakenly received the impression that you had not gotten a price quote from the dealer, and I made the statement I did about checking with the dealer because I've seen people spend more at other places for inferior repairs than they would have spent on a factory remanufactured unit from the dealer.
