I think Hotrod has succumb to cosmic rust : r/transformers

Transformers: Earth Wars Beast Wars Mini-Comic in Full and Live

Silverbolt (G1) - Transformers Wiki

Cosmic Rust (disease), Transformer Titans: Animated Wiki

Superion (G1) - Transformers Wiki

Minor/Repaint: - COSMIC RUST

Cosmic Rust (episode) - Transformers Wiki

Cosmic Rust by Ashourii on DeviantArt

Transformers: Earth Wars Beast Wars Mini-Comic in Full and Live

Transformers: Earth Wars Event - Mind Games