Budget Transmission Upgrades - Diesel Power Magazine More Photos View SlideshowDodge Diesel Transmission Upgrades Manual - IMPROVED Separator Plates tempered steel / zinc plated (4 part numbers replace over 65 OEM Separator Plates):. TF-PLT-94B A500/42-44 RH/RE 1988-94 (without lockup boost tube) Improved Separator Plate . TF-PLT-94S A518-618/46-47 RH/RE 1988-97 (without lockup boost tube) Improved Separator Plate. TF-PLT-95B A518-618/46-47 RH/RE 1995-2002 (with lockup boost tube) Improved. Oct 26, 2012 · Jeep Builds - Diesel XJ Swap - I'm new to XJs, but not new to Jeeps, and not new to diesel powered Jeeps. My last vehicle was a 1995 Wrangler. It came stock with the 2.5L gas engine, which ended up dying around 195k miles. After that I (with the help of some friends) swapped in a small 4-cylinder 2.3L Cummins.