What diff oil is best for me to use n my rear and front gear boxs?

A lot of variables in the question with out more information. How about your center differential?

5K, 7K, 1K would be a good start. What buggy do you have?

5k,5k,1k is pretty much base line, but 5k,7k,1k/2k is pretty much the sweet spot for most ppl

Its not for the center diff its for the rear and front diff.What would bethe difference between 5k,7k and 1k?How would the thickness make a difference?

You use diff oil to make the diffs like limited slip diff. Heaver oil the less slip. Center is just as important as the front and rear. If all you do is bash not as big of a deal. All so where you run, how you drive has a lot to do with it.

when i said 5k,5k,1k that means 5k in the front 5k in the center and 1k in the rear

a "k" equals a thousand 5k = 5000.

I tried 3k, 3K, 1k then I tried 3k, 5k, 1k then I tried 5k, 5k, 1k, now I have 5k, 5k, 2k and might try 7k in the middle. So it all depends where you run and what you like.

I have 3 center diffs and 3 front/rear diffs. centers are 5-7-10 and the front/rears are 2-3-7 plus the ones in the car, 7-5-1. Its alot easier to sway out the diff that drain and refill at the track. Swap them out and then rebuild the one you took out when it needs to be.
Tires are a good starting point, diffs can get complicated if you let it. See what others are running diff and tire wise, start from that and build from there.
I'll see if I can find the artical on tire selections and what diff oils can do for the conditions, its liable to help out more.

man thats odd in my revo im using 60k 30k 300k lol

buggies diff's must be real different

Comparing a monster truck to a buggy is like comparing apples with oranges. If in a truggy what little I know you run heaver in them then a buggy.

What oils would I need to use in order to allow the buggy to turn tigther ? If I hit the throttle, my buggy tends to open and not to turn.

Here is some info. I did not write this but this will get you started.

CAR SETUP STUFF

NOTE that the rear toe in is very sensitive. MAX 3 degrees. More toe in=less oversteer.

Front- thicker gives you less steering responce off throttle and better on throttle "posi" traction pull out of corners because of the even power to both wheels... lighter oil gives lots of off throttle steering responce because there isn't a lot of resistance to how fast each wheel spins but less front wheel bite out of the corners because the power gets thrown to the wheel with the least traction.

Center- thicker gives more 4wd which can give you some under steer on a high traction track because the power to the rear is pushing the front tires (thicker oil will make the rear loose on low traction tracks while on throttle) but great drive with all 4 wheels accelerating the buggy hard... thinner oil will give you a lot of power to the front wheels so it pulls the buggy around on the throttle giving you good on throttle steering but lacks a little acceleration because mainly the front tires are pulling instead of all 4 digging.

Rear- thicker will give you understeer off the throttle because of the resistance between each wheel spinning to the other but if you do break rear traction both tires will be getting a lot of power making the rear of the buggy loose, thick oil can make handling a little inconsistant because of that... thinner oil will give you quick steering because of the low resistance of how each rear wheel spins and it will give you a hard time to break both tires loose because all of the power goes to the tire with the least traction which is the inside tire. To light of an oil can make the rear of a buggy feel loose everywhere.

A good base setup is 5k front, 7k center, 3k rear. Your diff setup probably wont be perfect on your first try so thats why you need a good base. After you drive the buggy and find out what changes you want to make to its handling then adjust it accordingly by using my info above. Diff setup in my opinion is the most important to make a good handling buggy. Tires being second because if your diff s aren't working correctly then a buggy will never handle right no matter what tires you have on. Suspension setup would deffinatly be 3rd most important and its very simple compaired to setting up diff s. Just take your time and ask for advice from the locals at your track.

Well Im running 7k n the center.Ill probably go 3k n the front and the back thanks.

as of right now im absolutely loving 5k,7k,2k and i strongly recommend it 46u, its on rails. it makes it so the rear just barely breaks loose, but just enough. idk how to explan it.