Looking through FMCSR 393.47, the only requirement I see in there is that the effective length of a slack adjuster on each end of an axle must be the same.
Where I live if the truck was manufactured with automatic slack adjusters you can NOT replace them with manual ones. Check with your local DOT you never know.
The difference between manual and automatic slack adjusters is the way in which the brakes are adjusted. Automatic slack adjusters have sensors that do not let the brakes get too loose or too tight. Manual slack adjusters have to be adjusted by hand and can be set too tight in some cases.
if you're looking to replace your automatic with manual the only option is the 91-94 Mazda Navajo's manual.
Yes.
Make sure that the rear brake adjusters were backed all the way off when fitting new pads. Once complete adjust up pads if manual adjuster or rely on automatic adjusters to do this, then adjust brake cable.
Converting a manual transmission to automatic transmission is not possible but you can replace a manual transmission to an automativ transmission . That is also an expensive deal.
If done by a competent mechanic.
Why? ASA's are an improvement over manuals, and eliminates periodic adjustments. Legally, if it came with ASA, you must keep them on and maintain them. Read your CMV book, if you are in this business, you better know it inside and out.
Get a manual on your car as there are springs and self adjusters that have to be put in correctly.
No, they are designed differently.
BMWs are only available with manual transmissions at purchase. However, automatic transmissions may replace manual. There are only a few automatic transmissions which may be used in a BMW, so it is an expensive process.
I'm no mechanic, but from what I have read, the later model engines have hydraulic lash adjusters that can be tested and replaced(Haynes manual).