If your vehicle is showing clunking noise when shifting from park to drive or reverse, here are the most likely causes and the parts you'll need to fix each one.
The rubber isolators that secure the powertrain degrade and tear over time. When shifting from Park to Drive or Reverse, the sudden torque reversal causes the engine or transmission to lift and slam back down, creating a loud clunk.
Common on rear-wheel and four-wheel drive vehicles, worn U-joints develop excessive play. Shifting into gear violently takes up this driveline slack, resulting in a sharp, metallic clunk or pinging noise.
On front-wheel or all-wheel drive vehicles, the inner CV joints can develop internal wear. Engaging a gear forces the joint to catch this internal slack, causing a noticeable clunking sound from the front axles.
Vehicles with two-piece driveshafts use a center bearing surrounded by a rubber cushion. When this rubber tears, the driveshaft can bounce against its mounting bracket during gear engagement torque.
If control arms or subframe components were recently replaced and the bolts were not torqued to specification under the vehicle's weight, the shift in driveline torque can cause the suspension components to shift and clunk.
Wear inside the rear differential increases the gap between the ring and pinion gears. Shifting gears causes the driveshaft to spin slightly before slamming into the gears, causing a heavy, deep clunk from the rear.
A failing pressure control solenoid or worn internal clutches can cause the transmission to engage gears with maximum fluid pressure. This results in a harsh, violent clunk that shakes the entire vehicle.