Blackfoot ball diff

[peaches]

Hay guys this is my first post I have a Blackfoot I built it about 20 years ago as I remember I went through a couple sets of dog bones then upgraded to the thorp dirt burners and the red billet spacers what I didnt know until now is that you need other parts to make it work properly so I stored it away on a shelf in a box but now thanks to my neighbour who races rc cars trucks I want to get it going again and enjoy it as much as I did for the short amount of time I had it running so I am hoping that you guys can steer me to a thorp ball diff and or any other parts I need I have a new set of beveled gears coming to replace th original that I chewed up stuffing the dirt burners in there thanks for any all help .

[HunterZero]

Welcome to the club!

The Thorp ball diff for the Frog-style ORV gearbox is a hard part to find, and are typically expensive in good condition - they fetch up to $60 or more on eBay.

Since the Frog and Brat were recently reissued, it's now very easy to get replacement driveline parts again. The re-released Frog comes with dogbones instead of the old hex shafts which can be had cheaply on eBay or from sellers like jr-rc and stellamodels, and a UJ set (#53908) is available, usually for about $25 or so on eBay. All the diff gears and gearbox side plates/bearing carriers are cheaply available on eBay. All parts will drop right into a Blackfoot. Ball race the car, get a couple of diff gear sets, and some 5mm shims and you should be fine.

- James

[peaches]

Thanks HunterZero

 The Thorp driveshafts I have and which are new are the expandible ones the male end that goes into the diff has 6 sides to it like an allen wrench I would like to still use them there is a thorp no slip rear end #4544 on ebay I am wondering if that is what I need I cant find any info about the thorp parts though .

[Lonestar]

Peaches - the Thorp diff for the BF/MB is one of the most sought after collectable piece for these cars... unless you're a vintage nut, sell them on ebay and buy the modern parts instead as suggested above. Kind of like if you have a 250GTO gathering dust in your garage and you just need a Clio to commute downtown

Cheers

Paul

[peaches]

I do realize now that they are hard to come by from hours of searching..... I may have to use the modern parts for now just to get it up and running but I built this truck 20 years ago so it would be nice to get it going with the original parts I bought back then! I stayed up until the next morning to build one for me and one for my brother so ya you could say Im a vintage nut.