Passage: Toyota Racing Development (also known by its abbreviation TRD) is the in-house tuning shop for all Toyota, Lexus and formerly Scion cars. TRD is responsible both for improving street cars for more performance and supporting Toyota's racing interests around the world. TRD produces various tuning products and accessories, including performance suspension components, superchargers, and wheels. TRD parts are available through Toyota dealers, and are also available as accessories on brand-new Toyotas and Scions. Performance parts for Lexus vehicles are now labeled as F-Sport and performance Lexus models are labeled F to distinguish Lexus's F division from TRD.

Question: Based on this passage, what does trd stand for on toyota trucks?
Steam of consciousness below:
The important part for answering this question is: Toyota Racing Development (also known by its abbreviation TRD) is the in-house tuning shop for all Toyota, Lexus and formerly Scion cars.
So, the answer is Toyota Racing Development.