Alright so I’ve been wanting to to the 6l80 swap in my 2011 rcsb 4.8/4l60 for a while now. Not for gas mileage or anything like that, simply because I want to. I am capable of doing the swap and have a tuner, just need to know what all is needed. Thanks!
2014 GMC Sierra (5.3) is in for various upgrades, so the following items will be available in about a week. NO REASONABLE OFFER REFUSED!
-stock exhaust headers
-20" OEM chrome rims
-stock step bars
-stock calipers/rotors/brake lines (50k miles)
-stock air intake
-1 autocal with unused blackbear tune
-1 diablo tuning device (I need to check if tune can be transferred}
-Rancho adjustable lift shocks
Just had the rear main seal, and the transmission output seal replaced which meant the transmission had to come out completely.
Everything looks and feels fine, except now there is a grinding/scraping noise coming from either the transmission output or where the drive shaft meets the differential. The noise is louder at slower speeds.
Do new transmission output seals need to be "broken in" and such noise is normal? Otherwise, it's back to the dealer.
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