How To Improve Shifting On The 6-speed Manual Transmission Guide

Difficult, notchy, imprecise, and sloppy shifting manual transmissions are a common complaint with the Genesis Coupes. These problems can be easily reduced or eliminated entirely with a few simple upgrades to fix Hyundai’s factory shortfalls.

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Priority upgrades:

· Redline MT85 transmission fluid – the OEM fluid is terrible, and this is the fluid most people have had the best luck with. Buy 3 quarts, it requires approximately 2.3 quarts, 17mm fill plug (make sure you can remove it first before draining fluid) and 24mm drain plug. Drain the old fluid out, fill with the new Redline MT85 fluid until it drips out of the fill hole when the vehicle is level. A fluid pump or funnel with tubing attached is the easiest way to fill it. Hyundai recommends a 60,000 mile change interval for this fluid but I would suggest a little more often.

· Megan Racing manual transmission mount – P/N MRS-HY-0440. The OEM transmission mount is so terribly soft it can be twisted by hand and it allows the transmission flop around. The upgraded mount holds it firmly in place, and reduces one point of driveline sloppiness. Make sure you support the transmission when removing the mount.

· Shifter bushings – The OEM shifter bushings are soft rubber that squish and absorb some of the movement when trying to shift gears. Replacing them with stiffer polyurethane bushings will transmit the force in a smoother and more precise manner. Both the front (round or oval bushings depending on year), and the rear square bushing should be replaced simultaneously. There are multiple companies that make them – pick your poison. Don’t forget to grease anywhere that movement occurs during shifting while you’re in there, and half of the hardware on the driveshaft is reverse threaded. Here is an install guide for the bushings, along with a short shifter if you add that as well. https://www.youtube.com/watch?v=rnPMNhW1D4k

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Optional upgrades:

· Braided stainless steel clutch hose – OEM rubber hose can slightly balloon under pressure and feel soft, but a stainless line will feel much more solid. Choose whatever brand you want, they’ll all work fine. Note: you must bleed the clutch line with fresh fluid afterwards. I’ve also been told that upgrading the brake lines to stainless steel as well will improve clutch feeling because they all share the same fluid. I changed all of my lines simultaneously so I can’t really comment there.

· Short throw shifter – some people like to upgrade to a short throw shifter while already in there, it is personal preference. Choose the brand you want, I think the ATQ is a little better quality, though.

· Weighted shift knob – a heavier shift knob can also make it feel a little easier to shift. There are tons of weights, shapes, colors and designs out there, so choose what you like.

· Magnetic drain plug – P/N 0K95B-27121 is a large magnetic drain plug to replace the OEM manual transmission drain plug to attract any magnetic shavings in the fluid from being circulated.

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Non-transmission related note:

If you are under the vehicle and loosening the driveshaft to do any of this work, half of the hardware on the rubber driveshaft couplers are reverse threaded so pay attention. If those rubber couplers are showing signs of cracking, they need to be replaced. Sideways Guru is the only one I know of making and selling these replacements at a good price at this time. There are 2 total rubber driveshaft couplers, one on either end of the driveshaft.