Looking for aftermarket parts to modify or upgrade your 1978 Jeep J20 with transmission internals? At Tunersports.com we carry a huge selection of the top name brand performance transmission internal parts and accessories for your J20.
Whether you have a 1978 Jeep J20 in Base trim we have you covered. We have 6 transmission internals available to mod your J20. All parts have free shipping to the Continental US 48 States.
 SHIPS FROM MANUFACTURER 18890.21OMIX proudly offers all the parts you need to keep your Willys/Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement manual transmission front bearing retainer fits 72-79 CJ5, 72-75 CJ6 and 76-79 CJ7 models equipped with T18 4-speed manua... Omix T18 Front Retainer 72-79 Jeep CJ 1975-1979 Jeep J20 Base $73.69 |
 IN STOCK 18608.05OMIX proudly offers all the parts you need to keep your Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement transmission stabilizer stud fits 76-82 CJ5, 76-86 CJ7, 81-86 CJ8 Scrambler, 87-95 Wrangler YJ and 76-91 SJ models. For stabiliz... Omix Transmission Stabilizer Stud 72-95 CJ & Wrangler 1975-1979 Jeep J20 Base $26.61 |
 IN STOCK 18608.06OMIX proudly offers all the parts you need to keep your Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement transmission stabilizer bushing fits 76-82 CJ5, 76-86 CJ7, 81-86 CJ8 Scrambler, 87-95 Wrangler YJ and 76-91 SJ models. Sold indi... Omix Trans Stabilizer Bushing Tremec & Warner Transs 1975-1979 Jeep J20 Base $23.53 |
 SHIPS FROM MANUFACTURER 16560.57Omix proudly offers a vast collection of OE quality replacement parts for Jeep & Willys vehicles to help keep the Jeep legend alive. This replacement sealed transfer case output shaft bearing fits 41-45 MB / GPW, 45-49 CJ2A, 49-53 CJ3A, 53-64 CJ3B, 50-52 M38, 52-57 M38A1, 56-64 DJ3A, 57-64 FC, 55-79... Omix Transfer Case Sealed Bearing 41-79 Willys & Models 1974-1979 Jeep J20 Base $58.29 |
 IN STOCK 18608.02Omix proudly offers all the parts you need to keep your Willys/Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement transfer case mount fits 72-83 CJ5, 72-75 CJ6, 76-86 CJ7, 81-86 CJ8 Scrambler, 75-79 Cherokee, 75-83 Wagoneer, 75-79 J-Se... Omix Transfer Case Mount 71-91 Jeep CJ & Wrangler 1975-1979 Jeep J20 Base $32.00 |
 SHIPS FROM MANUFACTURER 18760.37OMIX proudly offers all the parts you need to keep your Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement transfer case speedometer gear O-ring fits various 55-06 Willys / Jeep applications (Does NOT fit Rubicon models). Features 2.00... Omix Speedometer Gear O-Ring 55-06 Jeep models 1974-1988 Jeep J20 Base $30.57 |