Found them very knowledgeable and professional in their work. They were extremely patient with me and took the time out to explain what was happening.
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With some free time over the weekend, I tried a few things before my visit to Chrome Motors on Monday, thanks once again to @abirnale for his helpful pointers and for directing me to Chrome Motors and Dinesh.
Test runs with ADAS features off
I did multiple test runs on Nice Road with ADAS features completely off and a few setting combinations and tyre pressures but it did not make any difference and the vibrations in the floor/body and seats were consistently starting at 98 km/h till about 106 km/h.
Wheel balancing
After the above test runs I headed over to Tyre Professionals and got the wheel balancing and rotation done and explained to them the vibration issue that I was facing. Opted out of wheel alignment. Great service from Nayak and Sunil – they showed me the readings for each wheel and explained in great detail how those impact the vibration and pull issues in vehicles. There were no major red flags in my case – one needed a refitting and another needed the weights to be changed and I was all set. Unfortunately, my second round of test runs on the Nice Road after wheel balancing still had the issue with vibrations coming in at 98kmph till about 106kmph so a visit to Chrome Motors was inevitable.
Chrome Motors to the rescue
Went ahead with my appointment on Monday morning and met with Dinesh who is the service manager there, explained to him the issue I was facing and I was also honest about my multiple visits to Anant Cars on this issue. He gave me a patient hearing and promised to get this checked thoroughly and asked Manju to go along with me for a test drive to understand the issue first and then go about his diagnosis. I informed them about the wheel balancing that was done over the weekend and shared the numbers with them and they were happy with it.
Went on a test drive and Manju fully acknowledged the issue that I was highlighting, came as a surprise to me based on my earlier experience with the other service centre, and he also explained what he would be doing next to get to the root cause – If my memory serves me right I think he went in the order of checking propeller shaft then wheel rims then hubs then driveshaft etc. He was very methodical in his test drive as well and I could see he was maintaining various speeds and observing the behaviour keenly. As the first step he got the propeller shaft disconnected and we went on a test drive to see if the vibrations were still there this time the XUV was butter smooth at all speeds – no vibrations whatsoever. The issue was an unbalanced propeller shaft. They wanted to tighten and retorque the propeller shaft once before going to Cotek & Mahindra and this was done and tested but it dint fix the issue. Details were discussed with Dinesh and he asked Manju to immediately get the Cotek engaged and raise it with Mahindra whether to go for further investigation or go for a replacement of the propeller shaft. The Cotek was contacted and the advice was to fit the propeller shaft at 3 different rotations/alignment and test it along with flashing of few modules, it seemed like some kind of pre-checks / sop before raising a warranty replacement. The propeller shaft was marked and rotated and fixed after each test run, it was noon by the time the first run was done and work forced me to get back home and I left Manju to continue on it. Got a call in the evening that the issue seems to have been fixed after the third rotation/test and they asked me to come in the morning for a test drive. Dropped in in the morning and went on a test drive and the issue seems to have been resolved for now – was advised to drive a few hundred kilometres and report back if I think the issue has resurfaced. I am going to keep a keen eye on this in the coming days and get back to Chrome Motors in case it pops up again, am happy that the root cause has been identified finally and am sure Chrome Motors will get the fix if the issue reoccurs.
A big shout-out to Chrome Motors
Dinesh and Manju especially for all their patience and effort in getting to the bottom of this issue and getting a resolution. Found them very knowledgeable and professional in their work. They were extremely patient with me and took the time out to explain what was happening and also allowed me to be around the floor all along when my car was being worked on
Keyword: Vibrations on my XUV700: How Chrome Motors came to my rescue