WHen mine went bad, it was only the top module that needed replacing.
fairly easy, the guy changed it in the parking lot
"Frank Boettcher" <fboettcher@ebicom.net> wrote in message
news:cgtmP2ThiyuHJkDLnKti0bMBzBwu@4ax.com...
> Anyone change one of these. How do you get to it. My manual is less
> than clear about how to get to it to change? Do you have to get to it
> from the underside in order to see the bolts?
>
> Is it ususally just the top (pulse) module that goes bad.? Can it be
> removed/replaced without taking the gear driven module off the
> transmission?