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Car Forum / Hyundai Cars / February 2006

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Automatic Seems To Shift Itself--What Is It Doing?

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Robert Cohen - 26 Feb 2006 00:05 GMT
Maybe it's chip/computer is acclimating/adjusting itself to a different
driver's style of driving?

I'll be driving steadily our automatic on a highway trip, and it
occasionally seems to shift itself.

Is such normal? It doesn't worry me with  extended service contract.

Approx 50,000 mileage, 2003 Elantra.
Matt Whiting - 26 Feb 2006 02:08 GMT
> Maybe it's chip/computer is acclimating/adjusting itself to a different
> driver's style of driving?
[quoted text clipped - 3 lines]
>
> Is such normal? It doesn't worry me with  extended service contract.

Yes, that is why they call them "automatic", they shift themselves.

Matt
Tunez - 26 Feb 2006 17:31 GMT
SMART ASSED answers ALLWAYS help DONT THEY !!!!!!!

>> Maybe it's chip/computer is acclimating/adjusting itself to a different
>> driver's style of driving?
[quoted text clipped - 7 lines]
>
> Matt
Matt Whiting - 26 Feb 2006 19:26 GMT
> SMART ASSED answers ALLWAYS help DONT THEY !!!!!!!
>
[quoted text clipped - 9 lines]
>>
>>Matt

Yes, when an ambiguous question is asked.  :-)

Matt
Jody - 26 Feb 2006 23:04 GMT
no,  but they can bring a  few chuckles into a dreary day =-)
> SMART ASSED answers ALLWAYS help DONT THEY !!!!!!!
>
[quoted text clipped - 9 lines]
>>
>> Matt
hyundaitech - 27 Feb 2006 02:46 GMT
Gotta say, if I'd gotten here first, I'd have been tempted to post
something similar.  There's no way from the information given in the post
to get any idea of what the car is actually doing and under what
conditions.  Reminds me of the time a customer brought in her Hyundai
Scoupe with the complaint "tach goes up and down while driving."  Near as
we were able to figure, the customer thought it should remain steady like
the speedometer.  
1 - 26 Feb 2006 06:21 GMT
>Maybe it's chip/computer is acclimating/adjusting itself to a different
>driver's style of driving?
[quoted text clipped - 5 lines]
>
>Approx 50,000 mileage, 2003 Elantra.

Sounds like the Torque Convertor locking up. Many people refer to this
as the overdrive. You should also feel it when you give it more gas or
go up a sight hill. The RPM's will jump about 500. If you didn't have
the transmission flushed at 30k it would be wise to do this ASAP. Some
people say the trans shifting will get more noticable as the fluid
gets old. And make sure you only have it changed at the Hyundai dealer
and make sure they are using the SP III fluid only.
Robert Cohen - 26 Feb 2006 13:56 GMT
1:

"Sounds like the Torque Convertor locking up. Many people refer to this

as the overdrive. You should also feel it when you give it more gas or
go up a sight hill. The RPM's will jump about 500. If you didn't have
the transmission flushed at 30k it would be wise to do this ASAP. Some
people say the trans shifting will get more noticable as the fluid
gets old. And make sure you only have it changed at the Hyundai dealer
and make sure they are using the SP III fluid only."

Reply:

I'm recall manual overdrives in some 1950s vehicles.

We've been doing whatever the Elantra  owners manual requires

re: specifically, change/flush of the transmission fluid

I think it was done, and
will now follow-up with specific inquiry at dealer which would be in
their computer records too.

THANKS
Bob - 27 Feb 2006 01:11 GMT
> Sounds like the Torque Convertor locking up. Many people refer to this
> as the overdrive. You should also feel it when you give it more gas or
[quoted text clipped - 3 lines]
> gets old. And make sure you only have it changed at the Hyundai dealer
> and make sure they are using the SP III fluid only.

Unfortunately, going to the Hyundai dealer means nothing as far as them
using the proper fluid. The dealer I bought my Sonata from does not use SP
III. They use some BG magic synthetic fits-all.

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