Okay I have had these Trophy class diff cases for my T-maxx for EVER, they hold 1/8 scale diffs...the company went out of business a while ago so I have noone to call at the Manufacturer...I used to be able to go to ANY hobby shop and ask for a 7.5 diff adn they would know exactly what I needed...now I ask for them and the little snot nosed bastage at the counter turns his nose up and says " That's not a real part number" and I then get lectured by this half a person and how he knows all RC parts and he's never heard of those diffs in all of his 2 years in the hobby (end rant)......anyway I KNOW these were a real part and I know that most OFNA and Kyosho buggies ran these diffs.....My current problem is HOW DO I FREAKIN ASK FOR THE NEW VERSION OR WHATEVER TO GET A STANDARD 7.5 DIFF....I ordered an associated diff from adn RC8 to see if it will work....bt in the mean time if anyone can help I would greatly appreciate it.....