I sometimes buy my clutch kit from autozone and twice from the ford dealer. My autozone clutch don't seem to last as long, but i was looking at the description from autozone and they say its a 10 inch disk. When I called ford they said the only have 11 inch in stock. My question is are these 2 sizes interchangeable?

 

truck is 89 f150 with 4.9L engine, and trans is 5 speed. Don't know the maker of tranny

 

The F150 came with either a 10.5" or an 11", and either will work. I assume when autozone says a 10", they mean a 10.5"

The 11" will last longer and will "hook up" better, but either one is fine. The 11" has more friction material, so it will wear longer.

It's a Mazda M5OD transmission. The only real weak link is the input shaft, but that won't give you any problems on a stock motor.

 

thanks for the reply. My clutches don't seen to last, if the 11 inch works thats the one i will go with.