2002 Ford Explorer Power Train

MY WIFE WAS PICKING UP HER MOTHER AND SHE WENT TO PUT THE EXPLORER INTO REVERSE AND THE SHIFTER BROKE OFF IN HER HAND. SHE COULD NOT GET THE CAR INTO GEAR SO WE HAD IT TOWED HOME. I FOUND THE PIECE HOLDING THE SHIFTER WAS BROKEN OFF. FORD WANTED $1,000 FOR THE PIECE TO FIX IT. *TR

OVERDRIVE LIGHT BEGAN TO FLICKER ON AND OFF, AND THE TRANSMISSION WOULD NOT SHIFT PROPERLY. WOULD STAY IN A LOWER GEAR DURING ACCELERATION AS THE RPM CONTINUED TO CLIMB. HAD STORED CODES DIAGNOSED WITH THE FOLLOWING: P0732 (GEAR 2 INCORRECT RATIO), P0733 (GEAR 3 INCORRECT RATIO), P0734 (GEAR 4 INCORRECT RATIO). WAS ADVISED NOT TO CONTINUE TO DRIVE VEHICLE. REQUIRED COMPLETE TRANSMISSION REBUILD (BY AN INDEPENDENT INCLUDING UPGRADES) INCLUDING THE REPLACEMENT OF THE TORQUE CONVERTER DUE TO EXCESSIVE METAL FILINGS THROUGHOUT. TOTAL COST $2581.60. THE VEHICLE HAS NEVER BEEN USED FOR TOWING (NO HITCH) AND IS NOT ABUSED. . INVESTIGATION ON THE WEB REVEALS THIS TRANSMISSION FAILURE TO BE QUITE COMMON, CITING WEAKNESSES IN THE ORIGINAL DESIGN. CREATES A POTENTIALLY HAZARDOUS DRIVING CONDITION BECAUSE THE FAILURE CAN OCCUR AT ANY TIME AT WHICH POINT THE ERRATIC BEHAVIOR COULD LEAD TO AN ACCIDENT.

TODAY I DROVE MY 2002 FORD EXPLORER OUT AND UPON RETURNING HOME I COULD NOT SHIFT IT INTO PARK. I SWITCHED IT OFF THINKING THAT IF I CRANK IT UP AND TURN THE WHEELS IT WOULD GO INTO PARK BUT I COULDN'T EVEN CRANK IT UP BECAUSE I WAS NOT IN THE PARK GEAR. I PLAYED WITH IT FOR 20 MINUTES AND IT FINALLY WENT INTO PARK. I LET IT SIT FOR A COUPLE HOURS AND WENT BACK OUT AND CRANKED IT, IT WENT INTO GEAR. I DROVE IT AROUND THE BLOCK CAME BACK AND PARKED. CRANKED IT UP ABOUT 10 MINUTES LATER TO GO OUT AND IT WOULD NOT COME OUT OF PARK GEAR. I HAVE NO IDEA WHAT THE PROBLEM BUT IF IT'S SOMETHING SERIOUS THE DEALER CAN HAVE IT BACK. SOMETHING SHOULD BE DONE TO MAKE FORD REPAIR THEIR MALFUNCTIONS, WE ARE TALKING SOME SERIOUS MONEY ON THESE REPAIRS AND A LOT OF PEOPLE LIKE MYSELF IS LOOKING FOR WORK NOW. PEOPLE WE NEED TO START PROTESTING OUT SIDE THESE DEALERSHIPS. THEY ARE GETTING RICH AND WE ARE SUFFERING AT THEIR MISHAPS. *TR

TRANSMISSION GEAR SHIFT BROKE OFF STEERING COLUMN AS THE VEHICLE WAS PUT IN PARK. COULD HAVE BEEN A MAJOR SAFETY ISSUE HAD I BEEN ANYWHERE OTHER THAN MY HOME AND SHIFTING INTO ANY OTHER GEAR THAN PARK. THOUGHT THIS WAS AN ISOLATED INCIDENT ONLY TO FIND INFORMATION ONLINE THAT THIS IS A COMMON OCCURRENCE WITH THE 2002 EXPLORERS (OVER 100 REPORTED ON ONE WEBSITE ALONE). OTHER ISSUES I'VE EXPERIENCED SINCE DAY 1 OF PURCHASING THE VEHICLE NEW ARE TRANSMISSION LUNGING, VEHICLE ROCKING WHEN PUT IN PARK, AND DIFFICULTY SHIFTING INTO PARK.

THERE WAS NO INDICATION THAT THERE WAS A PROBLEM, THE VEHICLE SUDDENLY STOPPED SHIFTING CORRECTLY, STARTED MAKING BAD NOISES, WON'T SHIFT OUT OF SECOND GEAR, AND THE OVERDRIVE LIGHT IS FLASHING SPASTIC. THE VEHICLE IS ALMOST UNDRIVEABLE, AND THIS APPEARS TO BE A SYSTEMIC PROBLEM FROM WHAT I HAVE READ. I AM ABOUT TO TAKE IT INTO A TRANSMISSION SHOP FOR DIAGNOSIS. *TR

TL* THE CONTACT OWNS A 2002 FORD EXPLORER. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 30 MPH THE OVERDRIVE AND SERVICE WARNING LIGHTS ILLUMINATED AS THE VEHICLE BEGAN TO LOSE POWER. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR FACILITY WHERE THE TRANSMISSION CONVERTER BODY WAS REBUILT. IN ADDITION, REPAIRS WERE MADE TO THE OVERDRIVE PISTON, OVERDRIVE SPEED SENSOR, OVERDRIVE BAND, CARRIER PLANTER, AND REVERSE BOARD BUSHING. THE MECHANIC ALSO REPLACED THE TRANSMISSION FLUID. THE MANUFACTURER WAS CONTACTED AND ADVISED THAT THERE WERE NO RECALLS FOR THE FAILURE AND WOULD NOT PROVIDE ANY ASSISTANCE. THE FAILURE MILEAGE WAS 61,411 AND THE CURRENT MILEAGE WAS 61,445. UPDATED 2/28/11 *CN UPDATED 06/03/11*JB

I WAS DRIVING MY 2002 FORD EXPLORER SUV WHEN THE TRANSMISSION SUDDENLY FAILED, SHIFTING INTO NEUTRAL/LOSING POWER IN TRAFFIC. THIS WAS A DANGEROUS SITUATION! FORTUNATELY I WAS ABLE TO GET OUT OF THE WAY OF TRAFFIC. *TR

GOING OUT OF TOWN DRIVING ON THE HIGHWAY IN TRAFFIC AT 65MPH. O/D LIGHT STARTED FLASHING ON AND OFF. TRANSMISSION STARTED ACTING ERRATICALLY AND I FELT THAT I LOST 5TH AND 2ND GEARS. SHOP RAN DIAGNOSTIC TEST AND CODES P0732, P0735 AND P0775. CODES CONFIRMED PROBLEMS WITH 2ND AND 5TH GEARS AND SOLENOID B MALFUNCTION. *TR

TODAY IS 2/21/2011 AND JUST HAD THE CRAP SCARED OUT OF ME, THREE CHILDREN (AGES 4, 2, AND A 10 MONTH OLD) AND 4 OTHER VEHICLES WHEN GUESS WHAT---MY TRANSMISSION BLEW THE SERVO PLUG!!!! GEE IMAGINE THAT ANOTHER PIECE OF JUNK THAT CHINA/JAPAN OR WHATEVER YOU CALL THEM PEOPLE, ASSEMBLED!!! THANKS AGAIN FORD FOR SELLING OUT!!! FORD CEO'S WHOM I'M SURE ARE FILTHY RICH ARENT TRUE AMERICAN PEOPLE OTHERWISE THEY WOULDNT HAVE SOLD US OUT TO ANOTHER COUNTRY!!!!! DRIVING TODAY AT A LEGAL 45 MPH MY SERVO PLUG BLEW OUT CAUSING ME TO LOSE CONTROL OF MY VEHICLE AND CAUSING NOT ONLY MYSELF BUT 4 OTHER VEHICLES TO END UP OF THE ROAD CAUSING A NEAR PILE UP!!!!! WHAT ARE YOU (FORD) GOING TO DO FOR US PEOPLE THAT WERE CONNED INTO BUYING A PIECE OF CRAP FROM A PUSHY SALESMEN THAT FORD TRAINED!!!! DID THESE SALESMEN KNOW THAT THESE WERE JUNK AND THATS WHY THE PRICE WAS RIGHT!!! WELL ANYWAYS FORD HASNT SEEN/HEARD THE LAST FROM ME ABOUT THIS ISSUE!!!! I WILL BE THAT GUY THAT FORD IS GONNA HATE, I MUST ADMIT TO YOU GUYS AS YOU WILL FIND OUT I AM WITHOUT ANY DOUBT THE "BIGGEST [XXX] ON THE FACE OF THIS PLANET" AND I INTEND ON BEING JUST THAT UNTIL FORD TAKES CARE OF MY TRANSMISSION!!!!!! IF NEEDED I WILL SPEND EVERY DAY OF MY LIFE (UNTIL I'M 6 FEET UNDER) PURSUING THIS ISSUE!!!! LOOK OUT FORD HERE I COME!!!!!! PARTS OF THIS DOCUMENT HAVE BEEN REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

I AM ANOTHER VICTIM OF THE 2002 FORD EXPLORER AND ITS TRANSMISSION WOES. ALERTED BY A FLASHING OD YELLOW WARNING LIGHT, AFTER A TRIP TO THE GARAGE AND RESEARCH ON THE INTERNET, I DISCOVER THIS IS A SIGN THAT I WILL NEED A $3000 TRANSMISSION REBUILD ON A VEHICLE WITH ONLY 99K MILES THAT WAS CAREFULLY USED AND DEALER SERVICED. THIS IS A KNOWN PROBLEM BY FORD AND HAVE DONE NOTHING TO RECTIFY IF WITH CONSUMERS. *TR

I OWN A 2002 FORD EXPLORER XLS. I HAVE BEEN HAVING TRANSMISSION PROBLEMS FOR A WHILE AND FORD DEALER TOLD ME IT WAS COMMON WITH THE 2002 EXPLORER. I AM NOW AT 100K MILES AND MY TRANSMISSION IS IN NEED OF BEING REBUILT BECAUSE FORD MANUFACTURED A TRANSMISSION THAT WAS TWO SMALL FOR THE 2ND AND 5TH GEARS TO SHIFT IN WHICH CREATED FRICTION AND WEAR ON THE TRANSMISSION. I AM A SINGLE MOTHER WHO STILL OWES MONEY ON THIS VEHICLE AND I CANNOT AFFORD 2000 TO "REBUILD" THIS TRANSMISSION FOR IT TO FAIL ON ME AGAIN LIKE ALL THE REST. I CONTACTED FORD AND OF COURSE THEY TOLD ME THAT THEY COULDN'T HELP ME. MY FATHER BEING A MECHANIC TOLD ME THAT I CANNOT DRIVE THIS VEHICLE BECAUSE THE MOTOR WAS ABOUT TO BLOW DUE TO THE HIGH RPMS THIS TRANSMISSION HAS BEEN PUTTING OUT FOR A WHILE. AFTER DOING RESEARCH I FOUND THIS WEBSITE HTTP://WWW.CARCOMPLAINTS.COM/FORD/EXPLORER/2002/TRANSMISSION/TRANSMISSION_FAILURE.SHTML WHERE OVER 350 PEOPLE ARE HAVING THE SAME ISSUE WITH THE SAME YEAR, MAKE, AND MODEL VEHICLE. I COULD HAVE POTENTIALLY BROKE DOWN IN THE MIDDLE OF THE ROAD WITH MY THREE YEAR OLD IN THE CAR WHERE ANYTHING COULD HAVE HAPPENED. THESE VEHICLES ARE NORMAL BOUGHT FOR FAMILY VEHICLES AND I DO NOT SEE HOW THIS IS NOT ON THE RECALL LIST SINCE IT IS PUTTING MANY FAMILIES IN DANGER. PLEASE LET ME KNOW IF THERE IS ANYTHING I NEED TO DO TO GET A RECALL ACTIVE ON THIS TRANSMISSION. THANK YOU. *TR

FORD EXPLORER TRANSMISSIONS SLIPPING AND GOING OUT WILL GET U KILLED IF U PULL OUT IN TRAFFIC AND IT STARTS SLIPPING AND WANT GO SOMEONE MAY HIT U AND GET U KILLED. *TR

I WAS DRIVING MY EXPLORER YESTERDAY AND IT WAS ATTEMPTING TO SHIFT GEARS AND INSTEAD SOUNDED LIKE AN EXPLOSION OR A TIRE GETTING BUSTED. THE O/D LIGHT CAME ON AND START FLASHING. IT WOULD RESET ITSELF EVERYTIME THE CAR WAS RESTARTED BUT IMMEDIATELY CAME BACK ON. LATER IN THE EVENING, THE SERVICE ENGINE SOON LIGHT CAME ON. I'M NOT ONE TO WAIT AND LET SOMETHING TERRIBLE HAPPEN TO MY VEHICLES SO I TOOK IT TO AAMCO AFTER FORD TOLD US THEY WERE TOO BUSY TO RUN DIAGNOSTICS ON IT. AAMCO EXPLAINED THAT IT WAS EITHER THE TRANSMISSION OR THE SOLENOID PACK. UPON OPENING THE PAN UNDERNEATH, THEY EXPLAINED THAT IF THERE WERE METAL CHUNKS IT WOULD BE THE TRANSMISSION; IF NOT, THE SOLENOID PACK. SURE ENOUGH, THERE WERE BIG METAL CHUNKS. NOW, AFTER HAVING THE CAR ONLY TWO MONTHS, I'M HAVING TO COME UP WITH MONEY TO REPLACE THE TRANSMISSION IN A CAR THAT APPEARED TO BE IN STELLAR CONDITION. UPON DOING SOME RESEARCH TODAY, APPARENTLY THIS IS A COMMON AND WELL KNOWN ISSUE IN THE FORD EXPLORER. FORD NEEDS TO STEP UP THEIR QUALITY OF EQUIPMENT USED IN THEIR VEHICLES. IT IS SCARY TO KNOW I COULD HAVE BEEN IN TRAFFIC OR SOMEWHERE ELSE AND THE CAR DIE AND LEAVE ME STRANDED OR HURT. *TR

MY ISSUE STARTED LATE IN 2009. THE O/D LIGHT STARTED COMING ON AND FLASHING AND FOR A FEW MONTHS MY VEHICLE WOULD NOT SHIFT PROPERLY INTO 3RD GEAR AND OVERDRIVE. IT WOULD SLIP AND CLUNK INTO GEAR. THEN WHILE DRIVING UP HILL ON A MAIN ROAD THE TRANSMISSION COMPLETELY STOPPED WORKING. IT WOULD NOT PROPEL MY VEHICLE AND SHUT DOWN RIGHT IN THE MIDDLE OF A BUSY ROAD WHICH NEARLY CREATED A MULTI-CAR ACCIDENT. BOTH FORWARD AND REVERSE DID NOT WORK MAKING IT IMPOSSIBLE TO GET MY CAR OFF THE ROAD. MY CAR HAS BEEN SITTING IN THE BACK YARD SINCE I CAN NOT AFFORD THE COSTLY REPAIRS. I FEEL THERE IS AN OVERWHELMING AMOUNT OF SIMILAR PROBLEMS AND FORD SHOULD RECALL THIS ITEM. *TR

TRANSMISSION FAILURE

MY 2002 FORD EXPLORER TRANSMISSION FAILED. I WAS TRAVELING ON AN ON RAMP. WHEN THE O/D LIGHT STARTED TO FLICKER AND THERE WAS A SUDDEN POWERFUL JERK. IT WAS SIMILAR TO GETTING REAR ENDED. THE FAILURE OCCURS ABOVE 35 MPH. THE CONSEQUENCES ARE SUDDEN UNCONTROLLABLE JERKS. IN ORDER TO CORRECT THE FAILURE THE TRANSMISSION MUST BE REBUILT FOR A VEHICLE UNDER 80,000 MILES. *TR

WE PURCHASED A USED 2002 EXPLORER LTD. IN JULY 2010. THE CAR HAD 62,500 MILES ON IT AND LOOKED TO BE IN GREAT SHAPE. THE PREVIOUS OWNER HAD ALL THE SERVICE PAPERS AND WE CHECKED CARFAX AND WE SAW NO REASON NOT TO PURCHASE THE CAR. WE SHOULD HAVE CHECKED CARCOMPLAINTS.COM THOUGH. AS I WRITE THIS, THE TRANSMISSION HAS FAILED. ACCORDING TO WHAT I READ ON THE INTERNET THIS IS A MAJOR PROBLEM FOR EARLY 2000'S FORD EXPLORERS. HOW CAN I SHELL OUT $2500 OR MORE FOR A NEW TRANSMISSION?? FORD SHOULD BE HELD RESPONSIBLE FOR PRODUCING THIS LEMON'THAT I HAVE ONLY OWNED 5 MONTHS. ARE THERE ANY CLASS ACTION LAWSUITS BEING FILED AGAINST FORD MOTOR COMPANY FOR THIS PROBLEM? I WOULD BE INTERESTED IN PARTICIPATING. *TR

AUTOMATIC TRANSMISSION NEEDS REPLACED

2002 FORD EXPLORER XLS, DRIVING O/D LIGHT CAME ON AND TRANSMISSION STARTED FAILING TO SHIFT CORRECTLY, NEEDS COMPLETE TRANSMISSION REBUILD. *TR

2002 FORD EXPLORER - EDDIE BAUER EDITION. TRANSMISSION O/D LIGHT TURNED ON WHEN DRIVING UP A HILL. CAR HAS LESS THAN 80,000 MILES ON IT! READ THE HUNDREDS OF COMPLAINTS ABOUT OTHER 2002 FORD EXPLORERS: HTTP://WWW.CARCOMPLAINTS.COM/FORD/EXPLORER/2002/TRANSMISSION/O_D_LIGHT_IS_BLINKING.SHTML PLEASE HELP. *TR

I WAS DRIVING AND MY OD LIGHT STARTED FLASHING. A FEW MILES LATER MY CARS RPMS WENT UP AND MY CAR SLOWED DOWN, CAUSING MY TO QUICKLY PULL OVER TO THE SIDE OF THE ROAD TO AVOID BEING REAR ENDED. I TRIED TO DRIVE IT TO THE STORE A FEW DAYS LATER AND I GOT ABOUT 1/4 OF A MILE DOWN THE ROAD WHEN I HEARD A LOUD NOISE AND THE CAR DID THE SAME THING. I HAVE MY CAR SITTING IN THE DRIVE WAY WAITING TO GET IT INTO BE LOOKED AT. SINCE THIS IS THE SECOND TIME THAT THIS HAS HAPPENED IN UNDER TWO YEARS, I KNOW THAT THE TRANSMISSION IS HAVING ISSUES AND MORE THAN LIKELY I WILL HAVE TO HAVE IT REPLACED. *TR

2002 FORD EXPLORER, 274K MILES. TRANSMISSION BEGAN MAKING GRINDING NOISE; HAD IT REBUILT BY A REPUTABLE TRANSMISSION SHOP. SHORTLY THEREAFTER, IF BRAKING HARD, THE ENGINE JUST STOPS AND ALL POWER IS LOST. THIS HAS HAPPENED SEVERAL TIMES, YET IT STARTS RIGHT BACK UP WHEN I TURN THE IGNITION KEY. MECHANIC CANNOT GET ANY CODES TO SHOW UP. SIX MONTHS LATER, OVERDRIVE OFF LIGHT FLICKERS OR FLASHES FAIRLY REGULARLY, SHIFTING BETWEEN GEARS IS ROUGH AND IT WON'T STAY IN OVERDRIVE. ONCE REACHING OVERDRIVE, IT BECOMES 'MUSHY' AND SLIPS BACK AND FORTH, LOSING SPEED WHILE RPMS BOUNCE BETWEEN 1,500 AND 3,000. TRANSMISSION SHOP HAS CHECKED IT AGAIN, SAYS IT IS AN ELECTRICAL ISSUE AND THAT I NEED TO TAKE IT TO THE DEALER. DEALER CLAIMS THAT THERE IS ONLY ONE RECALL OUT ON THIS CAR AND IT IS FOR THE SPEED (CRUISE) CONTROL AND THAT THIS WOULD NOT HAVE ANY EFFECT ON THE TRANSMISSION. 4X4 HIGH LIGHT FLASHES WHENEVER THE TRANSMISSION SHOULD BE GOING INTO OVERDRIVE, BUT THAT EVENTUALLY STOPS. I'VE HAD TO RESORT TO DRIVING WITH OVERDRIVE TURNED OFF, WHICH IS THE ONLY WAY I CAN GET THE TRANSMISSION TO OPERATE SMOOTHLY WITHOUT ALL OF THE LIGHTS. THIS CAUSES ME TO HAVE TO RUN THE CAR AT HIGHER RPMS AND DECREASED FUEL EFFICIENCY. I HAVE AN APPOINTMENT AT THE DEALERSHIP TOMORROW FOR THE RECALL AND I'M HOPING THAT MAYBE THERE IS SOMEONE THERE WHO IS HONEST ENOUGH TO HELP. WENT TO ANOTHER TRANSMISSION SHOP WHO INFORMED ME THAT THIS IS A VERY WELL-KNOWN PROBLEM, THAT THEY REBUILD THESE TRANMISSIONS REGULARLY AND THAT FORD HASN'T ACKNOWLEDGED ANY FORM OF RESPONSIBILITY OR EVEN A REPAIR SOLUTION FOR THIS.

AUTOMATIC TRANSMISSION EXPERIENCED COMPLETE FAILURE OF BAND(S) FOR GEARS 3-4. DEALER OFFERED REPAIR FOR ABOUT $2000, BUT NOT RECOMMENDED AS ONLY RECEIVE 12 MONTH / 12K MILE WARRANTY FOR REPLACED PARTS AND NO LABOR AND NOT TRANSFERABLE. OPTED FOR TOTAL REPLACEMENT WITH FORD AUTHORIZED REMANUFACTURED COMPLETE TRANSMISSION FOR $3500 WITH 36 MONTH / UNLIMITED MILEAGE AND FULLY TRANSFERABLE. DIFFICULT TO ACCEPT A TRANSMISSION WOULD EXPERIENCE SUCH DRASTIC FAILURE WITH SO FEW MILES, NORMAL SUBURBAN DRIVING AND NO TRAILERING.

2002 FORD EXPLORER DIFFERENTIAL SUBJECT TO INCREASED WHINING @ 85000 MILES AND RAPIDLY FAILED OVER THE COURSE OF ONE WEEK @ 99,000 MILES. R SIDE WHEEL BEARINGS HAVE FAILED AT SAME TIME. DIFFERENTIAL HAS LOCKED UP AND DRIVE GEAR JUMPS GEAR TEETH DURING ANY TURN. DEALER CLAIMS THEY'VE NEVER SEEN SUCH A FAILURE BUT LOCATED A FORD 'FIX KIT' VERY QUICKLY SO AM VERY SUSPICIOUS OF THEIR STATEMENT. I PULLED THE EXPLORER FROM THE DEALER FOR SECOND OPINION AND REP TOLD ME TO 'PARK IT' AND NEVER TO DRIVE IT UNTIL REPAIRED DUE TO POTENTIAL OF HIGHWAY LOCKUP WITH EXTREME CONSEQUENCES. FORD IS HIDING THIS DEFECT FROM THE PUBLIC. HAVE JUST FILED COMPLAINT WITH FORD ONLINE WHO ARE REPLYING WITH FORM LETTER EMAIL REFUSALS TO HELP . DRIVE GEAR FAILURE ON ANY VEHICLE IS UNHEARD OF, AND SHOULD NEVER FAIL. VEHICLE SITS ON A TRUCK CHASSIS AND SHOULD BE STURDIER THAN IT IS. *TR

I PULLED INTO MY DRIVEWAY AND WENT TO PUT MY VEHICLE INTO PARK AND THE GEAR SHIFT WAS LIKE A BROKEN LIMB IN MY HAND. I CHECKED WITH SEVERAL AUTO PART STORES AND THE REPLACEMENT PART IS A DEALER ONLY PART. FORD WILL NOT SELL THE PART TO CUSTOMER FOR PERSONAL REPAIR. PLUS THE COST TO REPAIR IS VERY COSTLY. I WAS SEEKING INFORMATION AND FOUND SEVERAL OTHER COMPLAINTS ON AUTOBEEF-CAR COMPLAINTS.COM. SEEMS LIKE FORD NEEDS TO RECONSIDER THIS AS RECALL. *TR