미션오일에 대해 정보 공유 하고자 합니다. (뒷북이 아니길 희망하는 바입니다...)

안녕하십니까 최근 미션슬립현상을 겪고 있어 동호회에 기록되어있는 자료들을 살펴 보았고 추가로 조사를 해봤습니다.

http://v8camaro6.co.kr/board_mk/view.php?table=board_mk&br_num=402&mypage=1&page=1&test=total&keyword=%EB%AF%B8%EC%85%98

많은 정보를 기록해주신 모든 분들께 감사의 인사를 전해드리며 알게된 소소한 사실 몇가지 적어보고자 합니다.

in 2016, a new fluid specification for a "Dexron Approved" Mobil 1 Synthetic LV ATF HP was introduced in a GM Technical Service Bulletin 16-NA-175. The revision was to help correct a torque converter clutch shudder in the GM 8L90, 8L80, and 8L45 automatic transmissions.

Dexron LV ATF HP is made by Mobil and is marketed as Mobil 1 LV ATF HP. Dexron LV ATF HP is composed of a Poly-alpha-olefin (PAO) Group IV Base oil and additives developed by Afton Chemical needed for the proper operation of the 2015 and above GM 8L90 8-Speed rear wheel drive automatic transmission. The current GM specification that defines the fluid is GMW16974 (2nd Edition, May 2017).

해당 블랙라벨의 mobil1 LV ATF HP black label은 16년도에 생산되었으며 새로운 유체가 추가되었으며 자동 변속기 TCC 떨림을 수정하기 위해 만들어진 오일입니다. 

하지만 해당 미션오일로도 미션슬립문제가 해결되지 않음이 미국 커뮤니티에서 처음 나왔고 2018년 말 

Mobil 1 Lv ATF HP blue label 이 출시되었습니다.  2018년 10월에 새로나온 이 오일은 추가적 유체사양 (GMNA-9986555)이 도입되었고 2018년 12월 GM 기술 서비스(18-NA-355)에 도입되었습니다. 해당 개정안에는 시스템을 완전히 플러싱 한 후 GM8L90 및 8L45자동 변속기에서 토크 컨버터 클러치 떨림을 교정하는 것을 돕기위함 이라고 명시되어 있습니다. 

이 유체는 용기 전면에 파란색 라벨이 붙어 있으며 컨테이너 뒷면에 J-62120라이센스 번호가 적혀 있습니다. 

GM 기술 서비스 18-NA-355를 찾아보면 

TCC Shudder and New Mobil 1 Fluid Exchange

A new transmission fluid exchange procedure and a new formula of Mobil 1 Synthetic LV ATF HP transmission fluid have been released to address torque converter clutch (TCC) shudder conditions on 8L45 and 8L90 8-speed automatic transmissions (RPOs M5N, M5T, M5U, M5X) in some 2015-2017 Escalade, Yukon; 2015-2018 Silverado, Sierra; 2015-2019 Corvette; 2016-2018 CT6; 2016-2019 ATS, CTS, Camaro; and 2017-2019 Colorado and Canyon models.

The new fluid exchange procedure requires the use of the DT-45096 TransFlow Cooler Flush Machine and DT-52263 Transmission Fluid Exchange Tool Kit. (Fig. 10) The tool kit began shipping to dealerships at no charge in late January 2019. All GM dealerships should receive the tool kits by the end of March 2019.

Shudder Test

The new service procedure addresses shake and/or shudder conditions during light throttle acceleration between 25 and 80 MPH (40 and 128 KM/H) at a steady speed when the transmission is not shifting gears. To ensure TCC shudder is diagnosed correctly, drive the vehicle on a smooth road with transmission sump temperature between 122°F (50°C) – 158°F (70°C). Constant throttle input on a smooth grade is needed.

A shudder condition may also be a chuggle, surge or vibration condition. Use GDS 2 or the CH-51450 PicoScope to confirm that the concern is TCC shudder and not a tire/wheel vibration or a driveline vibration, for example. A screen print from GDS 2 or the PicoScope showing the TCC shudder event must be attached to the Repair Order hard copy. (Fig. 11)

If TCC shudder is present, a vibration peak will appear within +/- 2 Hz of the frequency listed in Bulletin #18-NA-355. Refer to the bulletin for additional information, including required shudder test conditions for each vehicle being diagnosed as well as the fluid exchange procedures.