Haz Posted November 9, 2023 Report Share Posted November 9, 2023 (edited) SSM 52051 - 2019-2023 Edge/Nautilus, 2022-2023 Maverick - AWD - Chatter/Shudder During Low Speed Turning Events Some 2019-2023 Edge/Nautilus and 2022-2023 Maverick vehicles equipped with all wheel drive (AWD) may exhibit chatter/shudder during low speed turning events. This may be due to fluid contamination in the rear drive unit (RDU). Drain and refill the RDU, refer to Workshop Manual Section (WSM) 205-02. Drive for 5 miles (8 km) in stop and go conditions with right and left turns and re-evaluate. If the issue is still present, continue with normal WSM diagnostics. For claiming, use causal part 4000. Supplemental information from 2019-2023 Edge-Nautilus Workshop Manual RDU Diagnostics and Testing document... Axle Fluid Analysis The appearance of yellow or green axle fluid in early mileage axles is a result of yellow marking compound used at the assembly plant to verify gear mesh contact pattern. The marking compound within the fluid will darken some over time. Appearance of milky fluid could be caused by water intrusion. Drain and refill the fluid and retest for normal operation. Supplemental document download links> (Applicable to 2019-2023 Edge-Nautilus) Rear Drive Unit (RDU) Differential Draining and Filling - General Procedures - 2019 Edge Workshop Manual.pdf Rear Drive Unit (RDU) Differential Fluid Level Check - General Procedures - 2019 Edge Workshop Manual.pdf Edited November 9, 2023 by Haz 4 1 Quote Link to comment Share on other sites More sharing options...
Gilmore Posted September 11 Report Share Posted September 11 I this replacement of differential fluid due to contamination during assembly a recall or to b fixed by the ford dealership? 1 1 Quote Link to comment Share on other sites More sharing options...
Haz Posted September 12 Author Report Share Posted September 12 Welcome to the Forum @Gilmore! This is not a Recall. Special Service Messages provide information to professional technicians about recommended Service actions when a vehicle exhibits specific symptoms. In this case, if the described AWD vehicle is exhibiting slow speed rear-end chatter or shudder while turning, then fluid contamination may likely be the cause, and changing the RDU fluid should be the technician's first-step toward correcting the issue. No suggestion is made that contaminated fluid was installed during assembly. The Workshop Manual citation informs technicians about a yellowish or greenish fluid coloration that may be visually evident on low mileage vehicles, which is attributable to the gear mesh marking compound -- with no recommendation for a fluid change. The Workshop Manual does recommend fluid change when milky fluid is found, which is indicative of water contamination. The Special Service Message provides another reason for fluid change -- a vehicle's behavioral issue of rear end chatter/shutter on turns. Good luck! 2 Quote Link to comment Share on other sites More sharing options...
Edge_2019 Posted Tuesday at 07:42 PM Report Share Posted Tuesday at 07:42 PM I have a 2019 AWD Edge and we started noticing a shudder in the rear end at about 66,000 miles. Dealer wanted $180 just to look at it, plus the cost of repairs. After searching online I decided to replace the rear differential fluid. Dealer wanted $62 for 1 quart of "Motorcraft Disconnect Rear Drive Unit Fluid XY-75W-QL". I paid it : ( I replaced the rear diff fluid and on the very first drive the shudder was gone!! Incredible! I'm now solidly in the camp of people who change their trans and diff fluid every 60k miles! I mentioned SSM 52051 to the dealer but they still wanted $180 just to look at it. 2 Quote Link to comment Share on other sites More sharing options...
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