When HPP teamed with GM Performance Parts (GMPP) and Classic Restorations to mate the new THM 4L85-E SuperMatic transmission to a built-to-the-hilt SD-455, we wanted to fully document the process ...

Circle D 6L80E Transmission Upgrades - Safe Six - Tech Circle D Makes GM's Best-Ever Transmission Even Better With its Bulletproof 6L80E Six-Speed Upgrades ...

$8 turbo 400 hop For the price of the trans pan, valve body, and separator plate gaskets, the firmness and quickness of GM Turbo 400 upshifts and downshifts can ...

American manufacturer GM's Performance Parts division announced yesterday the availability of a new version of the E-ROD crate engine, tweaked into being mated to manual-transmissions.