JUST RECENTLY PURCHASED A 1980 L207D CAMPER, 2.4 DIESEL W/4SPD, WAS DRIVING AND NO REVERSE GEAR, NO WARNING SIGNS, (IE) NOISE ECT, ALL OTHER GEARS WORK FINE, EXCEPT REVERSE, ANY LIST MEMBER HAVE ANY IDEAS, PROBLEM OR WAY TO FIX, DO I NEED A NEW GREARBOX OR REBUILD?