Originally Posted by budfish (Post 673227)

I recomend ceramic balls :thumbsup:

Originally Posted by Robby (Post 673374)

Under the auspices of not starting another deadend thread, because it's already been widely discussed (everyone's tired of it, and the arguing), I'd suggest checking any one of the pre-existing threads where opinions have already been given...... ;)

here's a couple to get you started -
http://www.oople.com/forums/showthread.php?t=103717
http://www.oople.com/forums/showthread.php?t=79066

Originally Posted by Frecklychimp (Post 673413)

The only problem with running with the RTR grease for racing (as they now come built...mine was a bag of bits!) is that you'll have no benchmark for tuning, any oil will be softer than the grease but give different resistance and temperature working tolerance...also a different feel to the car i would have thought... the grease in them is usually very thick and a pain to clean out going on experience with other Losi RTR gear diffs!

I started with 3K and went upwards, with each grade it improved.

Remember to bed it in before running it... hold one wheel and apply power, starting with low power and alternating holding each wheel.

I changed the oil in mine after a couple of runs to inspect it and there was some light swarf from bedding in, best to get rid rater than having increased wear rate on gears.

Just keep an eye on outdrive wear as they are softer than the ball diff outdrives

The car will instantly accelerate faster and brake a lot harder, it does feel completely different at first and you will have to adapt a little when taking jumps so take it steady to start with!

Hope it works for you matey,

Mark :thumbsup:

Originally Posted by TARTMAN (Post 673415)

Many thanks, just the advice i was looking for. will bed it in, run it for a meeting as is, then strip it and try oil, maybe 4000 as a starter fom whats been said..... i am not a fan of to much steering and run near bald front tyres, so will be a new car to try almost i reckon lol.....:lol:

Originally Posted by Gnarly Old Dog (Post 673482)

Pretty much everything that Frecklychimp has said on the subject I would agree with.

Most of the Horizon UK / TLR drivers continue to use the ball diff but those that have tried the gear have all reported back the same findings as the Chimp - in that it feels slightly different to drive, gives more drive (they had to back off their slipper settings) and in dry conditions they felt it was no handicap once an oil range was found that suited them.

The reason we continue to use the ball diff is that in variable weather / grip conditions, the consensus of opinion is that the ball diff is more consistent across a wider range of conditions whereas the gear diff could excel in dry and high bite conditions but that the characteristics didn't suit the wet conditions if the diff had been set up for the dry.

With the vagaries of the UK weather being anything but predictably hot, dry and sunny, we've all largely chosen to continue with the ball diff for now.
HTH

Originally Posted by Frecklychimp (Post 673424)

i know a fair few Durango drivers have tried theirs and gone back to playing with balls!

Originally Posted by Frecklychimp (Post 673631)

Gutted nobody picked up on my deliberate wording!

I have my gear diff in a seperate complete gearbox ready to go, that way it can be dropped straight in at a meeting... handy if i have any issues with another gearbox as its fairly quick to swap in between heats :thumbsup:

Originally Posted by vrooom (Post 675266)

I installed gear diff in my tlr 22, i found I was slower due the gear diff letting the wheel spinning inside out of corners. It also made mess of my gearbox due gear diff leaking, so im back with ball.

But i need those 3/32 carbine thingy balls to make diff last longer.

Originally Posted by Frecklychimp (Post 675314)

Never had an issue with leaking,

i green seal slime on outdrive seals when building to help sealand lubricate the outdrives to slow o ring wear, particularly when new.

Over filling with oil is normally the reason gear diffs leak... you should only fill till planetary gears/pins are covered and there is a visible bowl shape in the oil... it sometimes doesn't look enough but its the thickness of oil that gives resistance to gears rotating, not volume filling the whole unit up so the gears can't rotate... then as the force overcomes it the seals break and excess oil leaks out!

If diff oil leaks onto your gearbox gears you will get a lot of transmission drag.

if they are filled correctly and still leaking is an issue... use a smear/bead of Loctite 5910 automotive sealant around edges of casing when assembing from clean, that will stop it... but it'll need plenty of curing time...can be bought in halfords etc, used in engine building on sumps/gearboxes/diffs etc etc so more than good enough for a model car diff!