India, May 2 -- Tesla has backed away from an ambitious plan for innovations in gigacasting, its pioneering manufacturing process, according to two sources familiar with the matter, in another sign that the electric-vehicle maker is retrenching amid falling sales and rising competition.

Tesla has been a leader in gigacasting, a cutting-edge technique that uses huge presses with thousands of tons of clamping pressure to die-cast large sections of the car's underbody. On a typical vehicle, the underbody can consist of hundreds of individual parts.

Last year, as Tesla developed a new small-vehicle platform, it aimed to punch out the underbody in a single piece, Reuters exclusively reported last September, citing five sources familiar with ...