2 to 3 shift 2003 Santa Fe 3.5L V6

[Mick (archive)]

Anyone notice a "stutter" in the 2 to 3 shift in their 2003 Santa Fe with
3.5L V6 ? I have taken it back to the dealer who tried to "flash" the chip that controls the transmission but this didn't change it at all. They said they notice that there is a distinct hesitation, or "stutter"as it shifts from 2 to 3. I would describe it as a very lazy shift that almost seems like it slips before it grabs 3rd.

I am looking for suggestions as to how this can be fixed if anyone has the experience.

Thanks.
Mick

 

[John Doe]

There is a TSB fix to reprogram the bump. And you don't even have to take it in to the dealer! Try this..

Courtesy of Hyndai santa Fe owners Forum
http://p211.ezboard.com/bhyundaisantafemessageboard

There is a possible fix that anyone can do. If you need help disconnecting a battery terminal then get a friend to do it.

The computer has adaptive learning with regard to shift control. I used to think it adapted to the driver, but now I know that it is for the purpose of adapting to tolerances in the transmission including normal wear.

The TSB at www.hmaservice.com/webtec..._394890045 specifically recommend this with regard to what they call shift flare on the 2-3 shift (engine speed increases during the shift) or shudder on the 2-3 shift.

This procedure is completely harmless so you can do it for any problem or any time you want to have some fun

The procedure is to be done with the transmission fully warmed up. If you have been driving it should be warm even in cold weather. The engine coolant warms the transmission fluid.

OK, when the battery is disconnected the adaptive learning is lost. So disconnect a battery terminal then reconnect it.

Then Accelerate the vehicle through several 1-2-3-4 upshifts at small throttle openings (approximately 25-30% TPS) until shift flare or shift shudder no longer occurs. I assume 25 - 30% TPS is 25 - 30 % throttle.

(Another TSB says to use light and medium throttle openings)

As you can see in the TSB if adaptive learning does not solve the problem the transmission is to be replaced.

Go here hmaservice.com/webtech/ to see TSB's for your model and year plus the service manuals and electrical manuals, etc.

 

[hyundaitech]

You'll want to look at tsb 03-40-015. It pretty much spells out what the dealer should do for a shift flare or shudder.