![]() ![]() After the initial adaptation by the factory, the self-adapting is a very slow process as there should only be changes in clutch pack fill times and pressures as the clutches are slowly worn. The point of this constant adaptation is to account for variation in assembly tolerances and clutch wear over time. The TCU in the 722.9 transmissions is constantly self-adapting by adjusting clutch pack fill times and pressures. Despite that, however, there still can be shifting issues related to transmission adaptation as well as hardware issues such as a failing TCU or clogged solenoids. Over time, Mercedes has made improvements through software revisions and the use of new fluid. The early converter based AMG models had slow and sluggish shifting as well as harsh downshifts when slowing to a near stop. Nearly from introduction, the 722.9 transmissions have been known to have issues with shifting. With 7 forward speeds, gearing is both aggressive for acceleration, and conservative in the higher gears to aid fuel economy. ![]() The design allows for skipping of gears during certain downshift operations helping to create a sporty feel and quicker response. Details Tooling TCC/Lockup Symptoms ErraticTCC apply pressure,ExcessTCC slOversized Lubrication Harsh TCC apply & release,TCC codes Pressure Regulator Valve Kit 1 88740-09K F-88740-TL9* Pressure Problems Burnt clutches,BurntTCC apply components,rsized Supply Harsh shifts,Soft shifts,TCC codes & concernsPressure Regulator Valve 2 88740-02 Fits either of 2 locations F-88740-TL2* 3 Burnt clutches, Erratic line pressure,Oversized Working 3 88740-01 F-88740-TL* Low converter & lube flow, OverheatingPressure Regulator Valve Upper Shift/Engagement Concerns Valve Body 4-5 Flare, 4-5 Harsh, Delayed engagemeOversized B2/BR Regulator Valve Kit 88740-04K F-88740-TL4* Harsh engagement * VB-FIX Required 1 4 2 Lower Valve Body 2 ©2020 Sonnax Transmission Company, Inc.Variations of the Mercedes 722.9 transmission can be found in nearly every Mercedes model from 2006 to 2017. Mercedes 722.9 Click on part numbers for product details or visit to see all products for the unit(s) shown here. ![]() Please download the PDF to view it: Download PDF With more than 60 layouts to choose from, these convenient, go-to reference guides are valuable resources for any shop.Ĭlick here to view PDF if the tech resource does not appear below.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
January 2023
Categories |