I would like a fast truck and i do not like wheelies.i Will not bash in th mud should i use a CD?

YES. :yes:

How do i know the diff is good. Ofna have a few for 15$ och other for 40$. more money better diff? Truggy och buggy diff?46-50t?

Some still in stock
 

I don't see the diffs listed anymore. Didn't they sell them out? Thought I remember people saying they were receiving lots of refunds because many of the popular items were all gone.

Yes it did.
 

Yes that was the case. I received 4 of them and just placed another order with one more diff on the list this past weekend. They still had some over the weekend, just not the hardened diff. I guess now those are gone as well. Try hitting AMain and see if they have any left.

http://www3.towerhobbies.com/cgi-bin...&I=LXLGX1&P=SM
is it this one?

Sure is
 

It sure is. That it the 50T spur center diff unit. I picked up two of those for $9 each in that HPI garage sale. But yes that is what you are looking for. With the hardened gears installed it is pretty much indestructable. You can even take it one step further and use one of the RCM diff cups designed for the Savage, and get rid of the plastic cup because it can still flex under stress. The aluminum cups not only work well but they look awesome.

http://iphone.ebay.com/Pages/ViewIte...mvcc=0&sflag=1

Will this one fit mikes CD mount? Is it better than the HB diff?

The size of the spur gears you can use is listed & discussed a few pages back, have a quick look through. The ofna diff is arguably better as it has a metal case, but I've only ever seen 1 plastic 1/8 scale diff case thats become damaged inside and had to be replaced. Just one...

Which size spur you actually use is just a question of gearing for a certain speed with a certain kv motor and certain sized tires etc- use BrianG's calculator to determine what sizes you can use ( bearing in smind the size/ tooth count limited and pitches- 32p or Mod1.0 ).

Is the spur gear standard? Will hb fit the ofna diff?
I dont find what page u talk about, please Link. But the ofta diff will fit the mount?

Yes
 

Yes the diff will fit the mount, but the maxx tooth count you can fit in teh RCM mount is like a 44T or 45T MAX. Most of the diffs are interchangable so the spur gears are as well.

The mount itself will accomodate up to around a 47t without the need for clearance below the spur gear. Larger spurs will fit the mount, but clearance below it would be needed to accomodate the spur diameter and gearing would become limited with large spurs as well(has a pretty wide range, though). In a standard maxx truck, nothing larger than a 44t spur will fit between the chassis braces without clearance issues, but the mount itself will indeed accomodate larger gears. :)

Hey Mike, what's the deal with these? Is there any ETAs on the next batch?

Thanks and welcome home :)

Hoping to get the next batch done for next week - still catching up on emails, etc. while I was at RCX. :)