How thick diff-lock oil in my bl truggy

[gizzmo79]

I wonder what is you guys using (front, center and rear) , i use ofna oil.
I have tried with 10 000 front, 30 000 center and 5000 rear, but my front wheels is ballooning alot, and i almost does wheelis on the gras

[lutach]

Originally Posted by gizzmo79

I wonder what is you guys using (front, center and rear) , i use ofna oil.
I have tried with 10 000 front, 30 000 center and 5000 rear, but my front wheels is ballooning alot, and i almost does wheelis on the gras

I have solid spools instead of a center diff just to stop my front tires from doing all the ballooning. I also like to drive with the spool instead of mechanical brakes just because I never really drove my nitro buggy (Which now is a conversion waiting for some custom made parts). I know some local guys who have went with the Ofna 100,000 in the center.

I had to go to 500K in the center on my last one, anything less and it was just unloading too much.

[Sammus]

i use 7k in the centre and just go easy on the throttle. If you're not too trigger happy it won't unload, and you'll still be far away from any nostril burning toxic fume releasing noise machines lol.

[stum]

I'm running my 8ight-e buggy with 10k center, 7k front, 3k rear and it's is awesome on the track. Now a truggy with bigger tires I would think a 30k center would be more than enough, at least for racing... if you are just bashing OR have motor brakes then 500k is fine. I know the traxxas e-revo center diff is now shipping with 500k, even the revo platinum has 500k so it is not all that abnormal.

Yea, it takes a lil track time with each truck to get it dialed. In my RC8 buggy I think I am running around 30K and its really close. With 100K in my truck though I was pulling the front tires off the ground just from the speed at which they ballooned, it was horrible.

[Gee]

Holy crap is this for real?
http://www.amainhobbies.com/product_...ducts_id/23510

Typed in differntial fluid and these were on there. Anyone spend that kind of money on a differential?

Seem to be in the hijack mood but it's related to the differential fluid question. Can't remember where i read it. It was recommended that a lighter fluid (not "lighter fluid", lower viscosity?) be used in the smaller 1/10 - 1/12th truggies vs the 1/8th scale. Is it going to hurt the performance of a smaller truggies to use the same f/c/b fluid that is used in a 1/8th scale? All I have is the three pack (10, 30, 50K) from traxxas.

I kinda understand the purpose of using the differnt wieght fluids in each differential to improve performace . It seems that if you go too heavy of fluids in all the differentials it would also make the motor work harder. Say instead of using something like 30/50/10k go with the lower viscosity 7/10/3k. Just threw some numbers in there for wieghts. Would the results be the same as the effect on the differential but less work on the system?

Hope my question(s) makes sense to someone.

[Sammus]

It's a very differently designed differential. That's probably the most expensive ones I've seen. The ofna TORSEN style diffs are also pricey, though not that much. Similar idea but a different design. The handling characteristics are very different to the diffs we are used to.

[stum]

Gee the motor is working regardless if your slippers are giving or not... so the performance differences lie with your ability to get the torque to the ground w/o spinning out & keeping control while achieving a higher speed through the track. I would think anyone using the motor brake would want a very high center diff to avoid all brake power going to the front typically causing less control. If you have mechanical brakes I've found the stock 10k center is really great, but if your setup is braking via the motor I personally wouldn’t do anything less than 50k and just work your way up to the 500k if necessary. Keep in mind the Traxxas setup is different with the transmission as well as it using motor brakes, so the 500k is necessary; the 8ights are direct drive off the center diff and often have mechanical brakes still.. but not always.

[RC-Monster Mike]

Originally Posted by stum

Gee the motor is working regardless if your slippers are giving or not... so the performance differences lie with your ability to get the torque to the ground w/o spinning out & keeping control while achieving a higher speed through the track. I would think anyone using the motor brake would want a very high center diff to avoid all brake power going to the front typically causing less control. If you have mechanical brakes I've found the stock 10k center is really great, but if your setup is braking via the motor I personally wouldn’t do anything less than 50k and just work your way up to the 500k if necessary. Keep in mind the Traxxas setup is different with the transmission as well as it using motor brakes, so the 500k is necessary; the 8ights are direct drive off the center diff and often have mechanical brakes still.. but not always.

The opposite of this is actually true IMO. I use motor braking and I use 10K in the center on my truggy. When I hit the brakes, the diff unloads AWAY from the front where all the load is, so the front wheels don't lock up. A heavier oil will unload to the rear to a lesser degree and cause more push when braking. As Sammus mentioned, if you apply throttle smoothly, the diff doesn't suddenly unload to the front when accelerating, either. I wouldn't use anything less than 10K in the truggy center diff, but I wouldn't use any more than 20K or 30K unless I was driving on the road and didn't want any diff action. In a buggy, I would use 5k or 7k in the center. 10K works best for me in the truggy center. I use 7k-10k in the front, 10K in the center and 2k in the rear on my race truggy.

i run 7-7-7 in my rc8t the front end seems to hold its one and the truggy handles great alot of the diff setups depend on the truggy also i know on a crt you need 30 in the center or it unloads bad

[Gee]

Thanks Stum. That helps. How many days does it take to put 500k in?

[stum]

Originally Posted by Gee

Thanks Stum. That helps. How many days does it take to put 500k in?

I start the drip about a week before I need it ;P LOL

Originally Posted by stum

I start the drip about a week before I need it ;P LOL

Use a spoon?

[TDC57]

For what it worth.

I'm running / using 7k in the front diff, 30k in the center and 5k in the rear on my buggies and truggies..

Hope that helps.

Have a great week..