I had a similar experience with my Tiburon. The Clutch retainers had broke and got into the differential causing the noise. I elected to purchase a Unwarranted Transmission from a salvage yard and repair it . Here is my experience / how to , it uses steps posted above and here - P0734 Transmission problems - Hyundai Forums : Hyundai Forum
My link - ElantraWiki - Repair : Overdrive / 4TH gear loss or slipping

 

I need to get my 2007 smogged but the check engine light is on and so when I had it scanned I got the P0734 and p0328 codes. I have taken it to several mechanics and they are telling me transmission needs to be rebuilt/replaced. You stated that replacing the clutch bearing solved the problem. I would like to get the car smogged and get that done if possible. If I get the knock sensor replaced will that possibly cause the check engine light to go out so I can pass the smog? Or will I have to fix the transmission first? Thanks. I don't know that I want to try and do the repair myself. I would need a video to guide me through it.


Need Help!

 

These descriptions of problems basically describe my situation. I have seen here, as well ad in other threads, the DIY repair/service to the overdrive bearing and am willing to give it a try. But I'm curious if there's anyway to tell if there's a more serious internal problem to the tranny which requires removal or is it purely a guess? At about $20 and an afternoon of my time vs. $1000 - $1500 or more, it's a no brainer. But I don't want to WASTE my time if I knew that the simpler WITT kit won't fix my problem. I don't expect an ironclad guarantee, but would appreciate any additional info.

Thanks s bunch!

 

I've found these videos:


I hope can change the overdrive kit

Thanks

 

[QUOTE=bulkwarrior;44564]

Luckily, it's not that difficult to fix. You don't even need to remove the transmission from the car. You need to order a new bearing kit from whatever it takes transmissions(forgot the exact URL but you can google it). The part number is 42220LK. You get a torrington race bearing, a bushing and something I can't name.

UPDATE: Thank you. Here is the link for the kit to repair the issue. https://www.wittrans.com/search?part=42220lk42220LK Kit, A4BF1/A4BF2*/A4AF2/ A4AF3 Overdrive Hub (Front)

Contains:

• 42220LA - Shim, A4BF1/A4BF2 O.Dr. Hub (Front)(.015"Thk)(Use W/42220L (Use W/42220L Brg To Correct Inplay,)(1.270"ID)
• 42056E - Bushing, KM175-5/176-5/177-8/A4AF/A4BF/F4A33/W4A32/W4A33 Forward Sun Gear (.808" ID)
• D42220L - Hyundai A4BF1/A4BF2/A4AF2/A4AF3 OD Hub (Front) Bearing w/Race & Cup Race 45525-22800 (Brg W/Race Is .109"Thk, 1.672"OD, 1.108"ID) (Cup Race Has 6 Outer Tabs)(2 Piece Set)

If you DO NOT install the shim the issue will continue. The shim is key. We also recommend replacing your filter and pan gasket due to the broken bearing particles.

 

On behalf of the many who have benefited from the information you provided in this thread, and just don't have the time to thank you. I'm proud to present to you, the top award for outstanding achievment at successfully determining the problem many of us have with this car and keeping them running and affordable for many. Thank you!
Congratulations! 🎉

Let's have a warm round of applause!