loud rattling from engine compartment idling in drive. issues shifting into rev on 1996 Ford Explorer

no rattling while driving normal speeds. rattling greatly reduced when i shift into neutral while stopped at traffic light. i have been driving with the rattling for months. just recently started having occasional difficulty shifting into reverse ( auto trans). feels stuck or being forced. brake warning light has also been on for about six mos.

by in Los Angeles, CA on December 10, 2012
2 answers 1 comment
ANSWER by , December 10, 2012
is the rattle in front of the engine or between the engine and transmission?
COMMENT by , December 10, 2012
hard for me to tell. noise only occurs while in drive. no noise when i look under hood in park with engine running. also, my reverse gear problem has vanished once i discovered that my parking brake was engaged...how stupid is that ? i never use it...dont know how it got set. to answer your question, i tend to think the sound is coming more from the underside of the engine maybe slightly to the left.
ANSWER by , May 13, 2013
My 2000 exp. had the same problem. The idle pulley was worn and rattling at low rpms. Stopped when in park or neutral or hiwhay speed.