The weak point in 9000 gearboxes is 5th. The splines strip from the inside of the output side cog.
I've seen several with dodgy 5th, and my Carlsson box I was rebuilding today had less than half of the spline left on 5th. Luckily the doner box had more (I could get about 10 degrees of twist on the cog).
My reverse had been trashed before I bought the car a year ago (and it hung out his long - neraly), and the doner box died as the oil channels in the input shaft got blocked and siezed the gears.
I've seen several with dodgy 5th, and my Carlsson box I was rebuilding today had less than half of the spline left on 5th. Luckily the doner box had more (I could get about 10 degrees of twist on the cog).
My reverse had been trashed before I bought the car a year ago (and it hung out his long - neraly), and the doner box died as the oil channels in the input shaft got blocked and siezed the gears.
