Originally Posted by
Gearhead3620
I bought the diff on thetoyz.com the part number is ASC7678. the bearings were bought on amainhobbies.com and the part number is ASC6903.
To fix your issue it's gonna cost some more money, you should have bought these....
http://www3.towerhobbies.com/cgi-bin...?&I=LXXCX5&P=7
Keep the rest of your diff parts and get these...
http://www3.towerhobbies.com/cgi-bin...?&I=LXZEL8&P=7
the parts you hav are not designed to work with the diff case you have..
Your other option would be to get a tranny case from an original B4 and not a B4.1 and keep all the parts you have. I won't guarentee it will fit but it should. I only say that because I don't want to give you bad info on a forum. I hate when people do that.
I don't know if the top shaft and idler gear bearings you have will fit in a B4 case..