Industry News 4R100 Torque Converter ByBrent Wilson on July 2, 2020 Atlantic Torque Converters are now available through WIT. Atlantic has been building premium converters that exceed OEM specifications for 18 years. The 4R100 Torque Converter (TC3661HD) is available with a Billet Lid.Advertisement Advertisement In this article:4R100, Atlantic, Products, Whatever It Takes Transmission Parts (WIT) Industry News: GM Genuine Parts Unveils New Logos, Expands ACDelco OE Parts on Vehicles Industry News: ProTorque Names Director of Motorsports and Sales Industry News: CVC Celebrates 25th Anniversary Industry News: AAPEX 2021 Opens Registration Advertisement WEBINARS Watch a webinar for free on-demand! E-MAGAZINE Read the most recent edition of Transmission Digest. SUBSCRIBE Stay up to date by signing up for Transmission Digest newsletters.