I could use some help understanding this and ways to get the proper service done before we drive 30 hours to Colorado to use this 4X4.
We have a 2020 Expy with F4 (4x4 options). has 23,488 miles, driven in used in 2H mode 99.9% of the time and driven in Georgia on mild city and highway roads, zero off-roading to date.
We had a nail in the sidewall on a rear tire. The tires had plenty of treads left but I decided to buy 2 matching new rear tires at 23K miles so they were better matched. The tires took 1 day to arrive so they put on my Spare which was a full-sized matching Michelin tire. That night driving home in a light drizzle, the warning 1st came on. Said ""Electronic Limited Slip Differential Reduced Torque" and had a place to click Ok. I clicked ok and message went away till I drove it again then it ceased coming on for a few short drives. I got the 2 new Michelin Defender LTX M/s put on the next day and later that evening, the warning message came on again. It now comes on occasionally (50% of the time) at low speeds, often under 45mph, and even on dry pavement. The dealer here in Savannah is a nightmare - 2 weeks to get a diagnostic appointment and 2-5 days there in the shop to diagnose the issue ( total joke for service but my only warranty choice) - but they are sending a mobile service to try and pull codes to see if it is a wheel speed sensor going/ gone bad.
So, to recap this started when using the spare and continued when we replaced both rear tires with similar Michilen 275-65-18 Defender LTX M/s tires which I've heard shouldn't matter. The original tires were. Michelin Primacy XC and there are still 2 matched on the front.
I could use help or advice as I've see dealers having trouble with ELSD messages. I've reviewed other posts and read deep into this one
https://www.expeditionforum.com/threads/2022-check-elsd-service-vehicle-soon.52620/ which contained this info below.
Electronic Limited Slip Differential Reduced Torque
Displays if the electronically limited-slip differential has limited functionality. This could be due to an undersized spare tire or caused by the system overheating. If you have an undersized spare tire installed, replace the spare tire with a full-sized tire as soon as possible. If you do not have an undersized spare tire installed, the vehicle has reduced functionality. Have your vehicle checked as soon as possible.
