1991 Dodge Truck D250 diesel

1991 Dodge D250 Cummings diesel . AT / P/S 2WD P/W PDL CRUISE CONTROL ! CUMMINGS WITH INTERCOOLER ! HAS A NEW RF FENDER NEW BUSHWACKER WHEEL OPENING FLARES , HAS TAILGATE STAINLESS WITH RED REFLECTOR ! FIBERGLASS CAMPER TOP ! ALUMINUM TOOL BOX ! AM/FM FACTORY CD STEREO ! HAS HAD SPEEDOMETER REBUILT ! THE BAD ! HAS TRANSMISSION CONCERNS ? WILL RUN GREAT FOR 30 MINS. THEN ACTS UP SOMETIMES STARTS TO SLOW DOWN TO A LOWER SPEED ? NO RUST THROUGH AND NO FLOORBOARD RUST AND NO RUST ON FRAME ! NORTH CAROLINA TRUCK !INTERIOR ORIGIONAL AND JUST NEEDS CLEANING ? I forgot to say that there is some body damage to rf fender and bedside behind wheel opening also ! This was from two deer that hit me ? I have new never installed Bushwacker formed wheel opening flares that fit the contour of the fenders and rear wheel openings ! Dodge didn't have any listings and if they were available they would have cost over $1000.00 ? The new Bushwacker flares were $500.00 !Plus i have new never installed stainless vent shades that go with the truck also !