Why does my Plymouth dodge neon have thumping noises going into reverse?
My automatic trans makes a thumping noise when I only come out of park into reverse and a slight thump noise coming into reverse from neutral

In fevered dreams where you are behind the wheel of a race car, revving your engine in competition with Tom Cruise's character in Days of Thunder, you don't normally picture yourself seated inside of a subcombpact car, but the 1998 Dodge Neon has changed that perception with its new R/T trim. Based on the Neon used in (and winning) stock car competitions, the R/T performance Neon is a race car that anyone can afford. With the twin-cam 2.0-liter, 150-hp engine, a sports-tuned suspension, steering, and springs, and front and rear anti-sway bars, you'll make quite an impression stopped at a traffic light. Striping, R/T badges, and interior leather trim complete the package.
For more sedate drivers, the Neon comes in either a sedan or coupe, in Highline and Sport trims, which also offer the twin-cam engine as an option. In 1998, base model Neons disappear and are replaced with the Highline. The Dodge Neon always gets rated highly for the way it handles the road and its great acceleration, even with the base single-cam, 2.0-liter, 132-hp and 3-speed automatic. While it can struggle up hills, it adapts smoothly to curves. Most drivers agree it is more fun to drive than similar subcompacts. Plenty of room inside for four passengers, an easy to read and reach dash, and lots of trunk space make the Neon comfortable to ride in as well.
Owners say the 1998 Neon's engine and soft suspension make it easy to speed (judge for yourself if that's a good or bad trait) and maneuver. The rounded front and high rear deck give it a sporty look, though the rear deck does cause blind spots. What most owners don't like is the poor reliability of the Neon, the cheap-looking interior, loud road noise, and lack of convenience options.
My automatic trans makes a thumping noise when I only come out of park into reverse and a slight thump noise coming into reverse from neutral
i have the first gen neon.i bought multiple valve cover gasket sets because i have a misfire. well everything this was going good, everything fit, except the tube seals. i’ve lubed them i’m and still nothing. the seals that NEEDED to be changed where all melted and cut up because of overheating. there are tiny bits of rubber still. i’m not sure if thats what is causing it to not fit. the seals is literally the same size as the hole!?
Turn key instrument panel doesn't respond gauges don't work headlights won't come on at all now plus car turns over won't start but for just a sec panal starts to work gauges work go to start it will almost start then gauges quit and back to just cranking
98 neon crank no start was going down the road died restarted went a ways died and won't start replaced cam sensor still no start
Bought car had to put in new wiring harness the car has power to everything it all comes on battery is good I've checked all the fuses and plugs made sure everything is good even checked all the vacuum hoses but now the car won't crank over also put on two new belts
Airbags
Dual front airbags
Audio System
AM/FM radio
Comfort Features
Steering wheel trim: leather
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheels: alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
AM/FM radio
Comfort Features
Steering wheel trim: leather
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheels: alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Multi-function remote: keyless entry · Steering wheel: tilt-only
Mirrors
Exterior mirrors: power
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheels: alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-only
Mirrors
Exterior mirrors: power
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheels: alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-only
Mirrors
Exterior mirrors: power
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheels: alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Multi-function remote: keyless entry · Steering wheel: tilt-only
Mirrors
Exterior mirrors: power
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheels: alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Steering wheel trim: leather
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-only
Mirrors
Exterior mirrors: power
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: intermittent
Airbags
Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Steering wheel trim: leather
Convenience Features
Multi-function remote: trunk release · Steering wheel: tilt-only
Mirrors
Exterior mirrors: power
Roof
Moonroof: power
Seats
Front seat type: bucket · Upholstery: cloth
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: intermittent