My gst has been making a clicking soung and seemed to be hopping in the rear when starting to get up to speed. I have come to the conclusion its the differentials. I was going to lock the center differential but am not sure how to do this. If anyone knows how or has a pic of the process that would help. Also if I decide to change the diff oil what would you recommend and where can I buy the oil. Thanx

it could be the truck shifting into second....my Nemesis did that until I tweaked the shift point adjustment screw. The Nemesis shifts into second early and the truck would shake.

I have adjusted the shift point but didn't seem to solve the problem. I can't hear the shift but this thing flies. Just really concerned about the noise. Don't want to strip or break anything.

Yeah, my truck shakes a little when it shifts into second, I think it shifts too early, i need to tune it.

rrcjr1972 most likely you are fine its just the truck shifting into second. you can hear it shift cause your shift point is way to early you need to tighten it up so it shifts later and then you will be able to hear it. as far as locking your diff you can give us a call and we can walk you through it or you cna go to our website http://www.cenracing.com/download.html once there scroll to the bottom you will see addtional information section and genesis diff lock is in there .