Ive run Durango diffs in my FS the last 3 meets ive done... the car is good, alot more drive etc and i would say alot easier to push hard.
Im running 10k Front and 5k rear... but at somepoint will be trying 12k front 7k rear.
Im putting ball diffs back in again for this weekends stotfold national i think.. then i will decide which way to run...
If anything with these geared diffs, it seems it puts more stress and strain on the car... and even though ive got all the gearbox shimmed and meshed so its nice and quiet... i just still cant get my head round the noise..
To fit them into the car is very easy... diffs drop straight in, you have to use quite a few shims though.. the gear which runs tho the outdrive etc this is the crucial one for meshing correctly and to make sure its not dbinding on its housing. I had to make up new center shafts out of 2 SP center shafts as they need to be slightly longer... You also need to use the 2.5mm pins from the durango drive shafts.. Just tap out the kyosho ones, re-drill then tap in and glue.
Any more info required, just give me a shout
Nick