94 sentra auto tranny problems

My Sentra has no trouble codes, but has only 1st and reverse...

A Classic case of bad tranny? I've been told to replace controller and/or lock up cellenoid. Where the heck are they? Anybody have an idea as to where I can get an exploded view of the tranny's guts?

Newbie

[Centurion]

Are you sure he didn't say it was the governor? If it is you're in luck because it can be replaced easily.

"A periodic problem on this vehicle is failure of the Governor (non-electronic shift Transmission only).The cost to repair the Governor is estimated at $157.95 for parts and $45.00 for labor.All prices are estimates based on $65 per flat rate hour and do not include diagnostic time or any applicable sales tax."