Here's another relic from the Beast past.
When I was at RoboCon two weekends ago, I purchased the Car Robots versions of Wild Ride (X-Brawn), Speedbreaker (Side Burn), and Brave Maximus all still mint-in-sealed-packaging, and the former two both came with the fabled early Car Robots toy catalog that ostensibly mentions the idea of Fire Convoy's Autobots having been a Dimensional Patrol and the idea of Gigatron and his Destrongers having been Beast Wars Predacons who came to present-day Earth from another time. These two notions were barely hinted at in the actual Car Robots anime and completely disregarded in the English Robots in Disguise dub. Nevertheless, it was supposedly these two ideas that enabled the Car Robots cartoon to be worked into the massive Japanese G1 cartoon timeline.
Wanting to find out if this was all true, I got my hands on this catalog and have transcribed the specific text that gives a description of the series' premise. Afterward, I posted the text online elsewhere and in return received a more professional-grade translation of the text (rather than using Google Translate), and it turns out that the ideas of Car Robots characters having crossed dimensions to get to 21st Century Earth was actually the case all along.
Here's the original text from the catalog:
このロボットたちは、キミの町にもいるのです。きっと…
トランスフォーマーカーロボット
次元の裂け目を潜り抜け、21世紀の現代に突如出現した、謎の侵略者集団、デストロンガー。全うちゅうたじげんに散らばる超生命体トランスフォーマーの、悪の種族デストロンの急進派である。メカ動物とロボット、両方の姿を持つ彼らの猛攻に、世界中の政府と軍隊が翻弄される。「私の名は、ギガトロン。選ばれた宇宙の独裁者だ。私は、この地球が欲しい!」彼らの目的は、地球にある全てのエネルギーの強奪!そして、全てのトランスフォーマー達を束ね、新たな秩序を構築すること!
「待てデストロンガー!我々サイバトロンがいる限り、お前達の無法は許さない!」見よ!消防車が、パトカーが!新幹線が!次々にロボットに変形!デストロンガーに戦いを挑む!彼らこそ、正義のトランスフォーマー、サイバトロンの次元パトロール隊。デストロンガーを追って来た彼らは地球の乗物をスキャン、自らの姿を変えて潜伏していたのだ。かくして、新世紀の日本で、カーロボット対ビーストウォーズの壮絶な戦いがくりひろげられる。
And here's the translation I received:
These robots in are in your town. Surely they are...
TRANSFORMERS CAR ROBOTS
Through dimensional cracks, the mysterious invader group, the Destrongers, have appeared in the present era of the 21st century. In whole, they are a radical faction of the evil Destron race, of the scattered super-lifeform Transformers. Mecha animals and robots, they use both forms in their onslaught and toy with governments and militaries all around the world. "My name is Gigatron. I am the chosen dictator of the universe. I desire this Earth!" Their purpose is to steal all of Earth's energy. And unite the Transformers under a new order!
"Stop, Destrongers! As long as we Cybertrons exist, your injustice will not be allowed!" Behold! A fire truck! A police car! Shinkansen! All transform into a robot one after the other! The Destrongers are challenged to fight! They are the Transformers of justice, the Cybertron Dimensional Patrol unit. They came after the Destrongers, scanned Earth's vehicles, changed their forms and laid in wait. In the new century's Japan, the fierce battle of Car Robots versus Beast Wars unfolds.