“The goal was to bring it back to exactly the way it was,” said David Smith of Disneyland’s facilities and maintenance department, which oversaw the Big Thunder Mountain Railroad roller coaster rehabilitation project.

The “wildest ride in the wilderness” is expected to reopen to the general public on March 17 after a 14-month rehabilitation, the most extensive overhaul since the ride opened in 1979.

Except for one key scene, the ride won’t look any different to the casual observer — and that’s the point.

So much of the Disneyland experience is about passing along generational experiences — parents and grandparents reliving their childhood memories with their offspring. To that end, Disneyland set out to make the refreshed ride look and feel exactly like it did for every one of the 225 million passengers who rode it over the past 35 years.

While the coaster follows the same route about three-quarters of the track has been replaced, with only the three lift hills and the maintenance spur unmodified. The new train bodies look virtually identical to the originals with an updated chassis underneath.

Throughout the attraction, the Bryce Canyon-inspired buttes have been repainted, the audio system has been refined and the animatronic animals have been reengineered. Even the Rainbow Ridge gold mining town at the end of the ride has been rebuilt from the ground up.

Brady MacDonald, a writer for The Los Angeles Times, rode the refreshed Big Thunder coaster this past weekend during employee previews and found the experience to be just as he remembered it with all the off-your-seat whoop-de-dos and come-over-dear seat-sliding turns still delivering the family-friendly thrills he loved for decades.

The track is still a bit tight and will take a while to break in, making the ride seem slightly faster than it used to be (although Mr. MacDonald was told it remains the same 28 mph). It’s definitely a smoother and quieter ride, making it easier to hear the enhanced audio effects you might have missed before (assuming you’re not riding with a train full of hooting and hollering cast members).

The first lift hill has an updated animatronic flying bat scene that recalls the dancing ghosts in the Haunted Mansion dining room. The stalactites and stalagmites that follow feature new paint and lighting that make the cavern glow with a rainbow of colors.

Along the way you’ll find all your favorite animatronic creatures right where you remember them — from the howling coyotes and dangling possums to the tail-rattling snakes and neck-swaying turtles. Everybody’s favorite dynamite-gnawing goat now sets up the payoff in the new explosive finale.

The new and improved third lift hill, which once quivered with quaking rocks, now features a series of “Danger – Keep Out – Blast Area” warnings that portend a combustible climax. As the train climbs the lift hill, a trail of fuses race up the walls toward a cluster of dynamite as steam blasts from cracks in the cavern. At the top of the lift a mix of sound, lighting and fog effects create the illusion of a tremendous explosion that envelops riders. Mr. MacDonald recommends sitting toward the rear of the train to get the best view of the special effects.

The Big Thunder refurbishment and the addition of the Captain America meet-and-greet at Innoventions mark this summer’s only major additions at Disneyland. Save for the possibility of a new parade and some spiffing up of old favorites, expect next summer to be equally light on new attractions with the park’s 60th anniversary on the calendar.

That leaves fans wondering and waiting for the next major expansion at Disneyland, which could be another update to Tomorrowland with a Star Wars or Marvel overlay and a much-needed refresh for the 1977 Space Mountain indoor roller coaster.

Until then, we welcome back the beloved Big Thunder Mountain in all its old and faded glory.