Sorry if this was already covered in this thread but 700 pages is to much to go through.

What are the advantages and disadvantages to going up and down in diff fluids for the front and rear differentials?

Look on page 776 it was discussed.

Would 100k diff oil be to much in front? My car is very twitchy even with 30K up front, of it there something else I should change? I actually did find a setup that will keep the rear end from sliding out so I am half way there
Thanks!

100k?? or 10k?

I run 5k front and rear

100k, I already run 30K but want to remove some of the twitchyness of the steering. I don't have expo on my radio.

that's some extremely thick oil right there, I don't have any experience with oil like that, maybe someone else can chime in, but as of last weekend I believe I was running 5k front and 3k rear, it's incredibly smooth but my truck is also pinned so that helps as well.

I'd rather not do the pin mod for a couple reasons. Is there any other tunning options besides diff oil that will relieve the responsiveness of the steering, my servo is not very fast either.

The ACKbar steering rack from rcshox.com!

I ran 60K for a while, but quit when several users commented that they were having durablity problems with CVA's and outdrives.

If you haven't tried it already, most of your front end problems would be fixed by flipping the stock drag link bar around backwards (helping the ackerman), and using a dremel with the drum sander to clearance the steering so you can still get full lock. Don't overlook warped rear arms binding up, causing lots of wierd weight transfer related issues.

Upgrade your radio! just joking.

Thanks guys!
A new radio actually is on the list. Right now on a fly sky but looking at a dx2S. I looked at the ackerman bar and thought about flipping the stock bar but I have broken two steering bellcrank arms without them being sanded. How would I know if my rear arms are warped? And lastly what problems were people having with out-drives that were caused by thick fluid?

Are your endpoits set correctly??? There is now way you should be breaking the stock bellcrank arms If you remove the a arms it is clrae to see if they are warped... thick diff fluids have no negative effect on the outdrives... not that I know of anyways.

Yes, endpoints are set correctly. I think the servo saver was just to tight. Both breakages were after bad landings.

Can someone clarify this as a whole.
Also what is this pin mod?

Not yet, will in the next day or so.