While driving, usually upon slow pickup, the transmission seems to "jump" when shifting between 20 and 30 MPH. This is an automatic. It's a 05 Elantra with 132K. Any ideas what is needed?
Country: United StatesMake: HyundaiModel: ElantraYear: 2005
Hello I'm Neal and I am here to help resolve your issue. If I cannot help I will opt out and refer your question to another expert.
A common issue on those is a "shudder" or a "flare" when shifting from 2nd to 3rd gear and it may be more prominent when accelerating gently. Would either of these descriptions be accurate? If so it may just be the fluid level, but to properly check the level and diagnose the problem requires a scan tool. There may also be the need for a relearn procedure which can also sometimes resolve the issue. These tests are best done by a transmission shop or a dealer. If these do not resolve the issue it may need to be replaced unfortunately.
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The "jump" I spoke of is more like a belt in the transmission slipping. It shakes the car failry violently. I checked the fluid with the dip stick and it looks fine. I did it while the engine was running. I also had a front end aligned and the tires balanced to solve another issue, but this one is very concerning to me. Any other suggestions? The check engine light is on, but I don't think that is the problem. I will read the codes later. Are there specific codes related to transmission issues?
Thanks so far for your help.
There are codes for the transmission, why don't you get back with me after you get the codes read? I can tell you a lot more if I have the codes. Make sure to write down the exact code numbers and let me know.
I read the codes and the code that came up is only for the O2 sensor (P0139). No trans codes. I don't think the fluid has ever been changed. Could that possibly be the problem?
How did the fluid look and smell?
The fluid is a bit dark but it still has a red tint, and it smells a bit like varnish, but no very strong. I put some on my finger and it was not gritty and it was still oily.
A transmission service could resolve the problem and it is worth a try, but if there is a serious issue going on it will likely cause it to get worse quickly, which would happen anyway. So it is worthwhile to service it if it has never been done.
Shop Owner and Mechanic on multiple makes.