B44.1 diff gears

[topher2009]

Hi, is there a secret to the b44.1 bevel gears or an upgrade option from another car?

Running a b44.1 in the club off-road champs and going very well but keep killing the rear bevel gears. I am running a 5.5t in it so maybe a bit powerful but the diff seems to hold up, just the gears that don't! Might be the slipper a bit tight but just wondering if anyone back when these were newer did any gear upgrade!

Thanks

Chris

[Big G]

Fit geared diffs? Metal crown n pinion then

[topher2009]

Thanks for the reply, which gear diffs fit as a replacement?

[Origineelreclamebord]

The B44.3 featured gear diffs, but I think to fit these on the 44.1 you also need different gear casings and perhaps more. BugleBoy Racing also had a conversion that allows you to fit DEX410 gear diffs:

http://bugleboyracing.com/index.php?productid=20


Honestly though, I'm not sure the ball diff is actually the problem. The B44's drivetrain was conceived in the era of brushed motors where lightweight was more important. The gear casing is relatively thin by modern standards, so under (heavy) power it may flex to an extent that the mesh is poor, wearing quickly or even stripping teeth. You could try shimming the gears (toward each other) so that the mesh is a little tighter, hence if there is flex the mesh is better.

When shimming the gears, pay attention that the gears still move freely and are not pushing against each other, as this will limit the service life of your ball bearings particularly, but possibly the gears too.

[topher2009]

Thanks for the reply, I have shimmed it now and think I have the mesh as perfect as it can be. Someone is lending me a 6.5 just to take the power down a little to see if that helps.

[MiCk B.]

Hi,


I ran all the series of B44 vehicles.


What I always did was remove any play between the diff and the crown gear.


When assembled if you can move the diff left to right on the diff outputs. Then you need to add a shim to move the diff gear closer to the crown gear.
(Really important on the rear.)



Following this method / procedure, I'd have a very reliable B44 transmission.


The conversion if you can still get the parts of the B44 to a Durango gear diff was very expensive. At this stage it would be a multiple of the value of the buggy.


MiCk B. :-)

[topher2009]

Thanks Mick, I had a closer look at the gears that failed and it is definitely the tip rather than root of the teeth that has gone, I was stupid and didn't even bother to check shims, I just put it back how it was..... Now I have new gears in, and it is shimmed correctly . Looking forward to some good racing Sunday now.

Winter project is ball joints! I am loving cheap off-road racing, car was cheap with lots of spares and I had spare electronics from mod touring car!

[MiCk B.]

Hi,


Keep an eye on the mesh as the gears bed in from new.



Any play I'd always add a shim, moving the gears together.




Enjoy the buggy.


MiCk B. :-)