Bandit says that it is 900 miles each way from Atlanta, GA to Texarkana, TX. It is actually 665 miles each way if taking the Interstates, or 622 miles if you take US-82, which is likely the route Bandit and Snowman took, since US-82 (erroneously referred to as "Interstate 82" by Silver-Tongued Devil) is mentioned at one point.
When Bandit is chased by the first cop it is slightly raining and the pavement is wet. Moments later, when he pulls behind a building to hide, the pavement is completely dry and the car's hatch-roofs are off.
Just before Sheriff Justice gives his, "this car is evidence" discourse to the Alabama State Trooper he pulls up directly behind the Troopers vehicle (obvious by the lights and stickers on the door). Following the discourse, when Sheriff Justice tells the Trooper to F.O. Justice pulls straight forward where the Troopers vehicle should still be parked.
When the police car at the road block is knocked off the embankment, the car seen rolling down towards the river is a late-'60s Ford Galaxy, but when it comes to rest at the bottom, it is a Plymouth Fury.
Interior shots show the Trans-Am to have an automatic transmission, but in several shots, it's evident a manual transmission model is used - When Bandit says to Snowman "Let's haul ass", he pulls an automatic shifter down into Low and rips away from Snowman's house. In the very next shot, when he takes off from the first traffic light, he revs the engine and dumps the clutch (only possible with a manual) to smoke the rear tires. When Bandit picks up Frog later, you can see him jam the shifter forward (into first gear), dump the clutch again, and shift into second gear causing the "bark" of the tires and sideways movement of the Trans-Am.
When the Trans-Am jumps the bridge, one police car falls into the water and the other hangs onto the side at an angle. It shows the car hanging over open water, but when Sheriff Justice hits that car, it falls into a pile of rubble with almost no water.
When Bandit's truck and the Trans-Am pull up to the Coors warehouse in Texarkana, the Trans Am is parked parallel to the curb behind the truck. In the next scene, the Trans-Am is now parked behind the truck at a diagonal angle.
In the first police chase when it is dark, Bandit dodges the smokey behind a small house of some kind. As he drives up from the front you can see one of his headlights is not working, yet shortly after when you see the car from the front its working again.
As Carrie and Bandit approach the playing field's dugout in their Trans-Am, the back wall is clearly made of cinder-block. But when they burst through the other side, the wall is now constructed of wood clapboard.
Near the end of the movie when "Snowman" takes charge into the roadblock of cops cars at the raceway, it clearly shows a "bullbar" or a grill guard on the front of the truck when he blasts through the cars (it wasn't there the whole movie), then in the next scene after he hits the cop cars there is no grill guard on the truck nor a single scratch to it.
During the 'hiding in the convoy' scene, when Bandit (and later Snowman) pass "Mister B's" tanker truck (the last truck in the convoy, or "back door"), we see that the cab is painted blue. However, when we see a close-up of Mister B talking to Snowman on the CB as he passes the convoy, the cab around him is an orangish-red.
The truck that races the Kenworth, at the Roadeo, changes from a 1970-1977 GMC Astro, with racing number 27, to a 1960-1972 White 7400 Series Cab-Over-Engine, with racing number 10. The Kenworth is also not the Bandit's. This is evident by the single exhaust stack (Bandit truck has two), and the race truck is wearing two-tone brown paint in the "Seminole" stripes. The Bandit truck is different in color and design.
When Buford T Justice is behind the Bandit, the Bandit passes Snowman's truck on the shoulder. The Sheriff attempts to pass the truck, but clips it. He loses control and the back end of the car goes sideways. As it crosses back in front of the truck, it is clearly struck in the right rear quarter panel. The very next scene shows the quarter panel in perfect shape.
The scene where Sheriff Justice drives along a line the side of the road and says "is this a drive in movie?". When he is out of the car yelling at the patrolman that told him he can't drive that car on "his highway", all the cars he drove along side of and the tow truck are gone.
When the Sheriff and his son are waiting for the funeral procession to pass, a few cars in the procession make the left turn in front of him, and then a few seconds later, the same two cars are shown about to make the same left turn.
During the scenes where the Bandit asks the convoy ahead to "slip into the rocking chair," the weather changes back and forth from sunny and clear to overcast. What is more, after the state troopers get ahead of the blocking truck (the one that cut them off and forced them onto the shoulder) and the Bandit, the Trans Am is clearly visible behind them in the right lane only a car length away, yet they don't even turn their head to see it right there.
When Sheriff Justice lines the three car strippers up against the car he places his sunglasses in his belt next to his gun. As he is about to kick one of the young men in the seat of the pants, only his sunglasses are attached to his belt and the gun is missing. The gun immediately re-appears.
While being pursued by the Arkansas state trooper who was relieving himself at the side of the road, an interior shot shows the Trans Am without a rear-view-mirror and wind-shield because it's a studio shot. They return in the next outside shot.
Just after a motorcycle cop pulls over Snowman, the motorcycle cop gets off his motorcycle and takes his sunglasses off. In the very next shot, the motorcycle cop's sunglasses are back on his face again.
The Bandit agrees to the bet's time limit of 28 hours so that after "tomorrow's race" they can celebrate with Coors. Within a couple of hours, Bandit buys the car, installs the CB radio, orders and receives personalized plates. Being the race is the next day, which is probably on a Sunday, he does all of this on a Saturday.
When Buford pulls behind the car strippers, he lights his cigarette and snaps the lighter closed to get their attention. Seconds later, when he kicks the kid in the blue shirt, his cigarette is more than half smoked.
When Sheriff sees Bandit (unknowingly) at the Union 76 gas station, he puts the car in gear and plows into another car. There is obvious body damage to the drivers side headlights. A few scenes later when the Sheriff pulls up to a road block that the Bandit already went through, the cars front have no damage at all.
When Bandit first sees Carrie, on the right hand side there is a car pulling out into the road making a left which would put it traveling toward Bandit and Carrie, but as the shot closes in the car is gone.
During the roadblock scene in front of the store the wide shot shows all 3 cruisers are Plymouth Fury's. However the cruiser that backs up striking the passing cruiser rolling it downhill is a Pontiac Bonneville.
In the scene when Bandit and Frog catch up to Snowman to give him the burgers, she is driving. But when Snowman looks in his side view mirror, Bandit is driving. When they all pull over, Frog is driving.
When Snowman gets stopped by the bike cop, he says that Snowman was going 96 mph. In the shots before that, you can tell that Snowman was probably going about 65 mph because of how slow the scenery was going by.
When Snowman is being thrown out of the bar, as the double-doors are being opened, there is a brief shot of someone's face standing outside on the right-hand side. They are not there when they show Snowman outside. It could be a crew member there to assist with the stunt.
At one point in the movie, a radio transmission from a trucker calling himself "Silver-Tongued Devil" says that Bandit and Snowman are "near Fayetteville and Interstate 82". Interstate 82 is nowhere near that part of the country (Arkansas/Mississippi/Alabama), but instead is over 2,000 miles away in Oregon and Washington. The trucker should have said "US Highway 82" instead, as that highway DOES indeed exist in that part of the country. Furthermore, Interstate 82 didn't even exist yet at the time of this movie (1977) as construction of that route didn't even start until 1978 and wasn't completed and opened to traffic until 1988.
After picking Carrie up when they were in Descent County Arkansas, while they were driving, Bandit passes a Georgia State road sign clearly showing as GA 92 with the GA state outline on the sign. Other GA State road signs are seen in Mississippi and Alabama, including GA 85 and GA 138.
The "Silver Tongued Devil" asks the Bandit if he is on interstate 82 approaching Fayetteville and the Bandit says yes. But, the route that takes you to Fayetteville from Texarkana is U.S. 71. It is 237 miles of some twisting mountain roads and is five hours in the wrong direction.
Bandit and Snowman are traveling to Texarkana, Texas to pick up Coor's beer. Alcohol sales are not permitted on the Texas side of Texarkana, nor anywhere in Bowie County, Texas. The closest location that sells beer along the western route they were traveling would be Annona, TX in Red River County.
When Sheriff Justice pulls up the three guys at the abandoned car, they do not hear the sound of his car pull up or the sound of him walking, yet they can hear the sound of the cigarette lighter being closed.
Sheriff Justice states repeatedly that he is from Texarkana, Texas, which is in Bowie County, but the decal on the sheriff's car door reads Montague County, which is six counties to the west of Bowie County, (Texarkana, Texas' county), along the Red River.
The radio mic Sheriff Justice uses is for an FM transmission radio. This type of radio transmits on a different wavelength (high band frequency) than CB radios. He'd never be able to talk to any CB users via this mic/radio.
In the song at the opening scene, it is stated that Bandit, while traveling down a steep mountain road, "hit them brakes, found he had no air". Most tractor trucks, and practically all of them in the 1970s, operate with a triple-valve air brake system. Without going into details, if a truck actually lost all the air in the lines, the brakes would be applied, not disabled.
When we see Sheriff Buford T Justice for the very first time, as he is opening his door to get out of the car the Sheriff badge on the side of his car has had part of it post-smudged out to cover the lettering.
In the restaurant just before Jerry Reed gets beat up by the bikers, he picks up the telephone and presses 10 numbers and says "Hello? Operator?" He would have only needed to dial zero to speak to the operator.
At the beginning "The Snow Man" and "The Bandit" agree to use odd CB channels and change them every time they talk to each other. And they do change channels during the movie. Everyone else like Sheriff Justice, The Gravedigger, the truckers in the convoy and the prostitutes, are always the same channel as they are without needing to change channels and search for them.
The 1977 Trans-Am that is used as the boys cross the Texas state-line has the "Honeycomb" wheels which are actually used on 1976 Trans Ams. In other shots the Trans-Ams use the "Snowflake" wheels that were new for 1977 and would be the correct wheel for that model.
When Bandit and Snowman open the garage door of the Coors warehouse, there are stacks and stacks of boxes on pallets that we are meant to believe are full of Coors beer bottles/cans. Yet when Bandit drives the forklift into a stack of boxes, launching Snowman over the stack, the boxes are clearly empty despite the addition of glass breaking sound effects.
When Buford and Bandit are first talking to each other over the CB radios, Buford isn't pushing in the button on the two way radio when he's talking, so in reality, Bandit wouldn't be able to hear him. Also, Buford is talking into the back of the microphone.
During the chase scene just after "Snowman" is pulled over by the motorcycle cop one of the chasing cars pulls a u-turn through median to give pursuit. However when performing this maneuver the car blows the front passenger side tire as witnessed by the large puff of white smoke disabling it from adding to the chase squad.