Grind sound after t-case fluid change

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Joined
Feb 20, 2026
Threads
2
Messages
3
Location
Alabama
I recently changed the gear oil in my 01 Cruiser. (Valvoline 75/90 full synth). A couple days later, I started hearing a grind-like noise only after the truck has sat for some time and only upon my initial acceleration. It goes away immediately afterwards and does not return. Does this sound related to my changing of the oil or just a coincidence?

I also occasionally get a similar sound when accelerating up steeper inclines. Could this be related?

I’ve checked the skid for any contact and made sure the fluid was topped off. Spiders and slips have all been greased recently. I can’t seem to find anyone with similar symptoms on the forum. I will try to get a video later with my GoPro, but wanted to see if anyone had any initial ideas. Thank you
 
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