Heavy-Duty RV Transmissions

This is the perfect transmission for your two-wheel drive towing and heavy-load trucking needs. These units have valve body modifications that increase cooler flow and improve shift characteristics without the harsh feel of a racing style transmission. When used with a TCI® Heavy-Duty Towing torque converter, you can be sure the transmission package is tailored to provide long, dependable service and maximum fuel economy. The optional low gear package offered with each of our RV units is a great addition for trucks pulling heavy loads.

Maximizer™ Transmissions

The Maximizer™ 4x4 transmissions bring performance to your four-wheel drive. A four-wheel drive application is especially tough on an automatic transmission and the addition of bigger tires makes the job even harder, We designed the Maximizer™ series to be as tough as your truck, because they are built with the best components available and programmed to provide crisp shifts time and time again.

Whether you drive a sand dragger, hill climber or tractor puller, TCI® has the transmission for you. The competition line of 4x4 transmissions is built following the same specifications we use in building thousands of drag race units. Applications are available with Trans-Brake valve bodies, also. Most popular listings are shown in the chart, but if you have special requirements, please contact us and we can custom tailor a competition unit to your specifications.

Triple Tested Quality

We also go the extra mile to ensure your Maximizer transmission is superior in both form and function. Beginning with a careful inspection of the transmission case and components that will be used, we replace stock parts with high performance bands and components where applicable. We increase fluid flow, lubrication system and thrust capacity. Problematic hard parts are replaced with stronger components, many of which we fabricate ourselves at our in-house machining centers. Valve bodies are completely remanufactured and 100% tested prior to installation. Finally, each and every TCI® Maximizer transmission must pass both a static hydraulic pressure test during assembly and a final dyno test prior to shipping. That's Triple Tested so you can be confident you're getting a transmission that's ready to rock.

 

Applications Engine Size Heavy Duty RV Maximizer™ 4X4 Full Manual Competition 4X4 AMC 1972 & later Torque Command 727 290, 303, 304, 360, 390, 401 601001 601200   Chrysler 1967-79 Torqueflite 727, small block, non lock-up 318, 340, 360 111101 1116001 11160312 1117002   Chrysler 1967-79 Torqueflite 727, big block, non lock-up 383, 400, 426, 440 111001 1114001   Chrysler 1993-95 A518 lock-up 2WD (23- spline) 3.9L, 5.2L, 5.9L 113000     Ford E4OD 1989-1995 V8 Gas   491400   Ford E4OD 1989-1995 V8 Diesel 491000     Ford C6 1966 & later, FE 332, 352, 390, 406, 427, 428 411001 4116003 4116014 4116025 4125003 4125014 4125025 Ford C6 1966 & later 351M, 400, 429, 460 411201 4117003 4117014 4117025 4126003 4126014 4126025 Ford C6 1966 & later 289, 302, 351C, 351W 411401 4118003 4118014 4118025 4127003 4127014 4127025 Ford AOD 1980 & later 305, 351   431400   GM 1993 ½-1996 4L80E V8 271000 271400   GM 1997 & later 4L80E V8 271100     GM 1996-97 4L60E truck V8 371010     GM 4L60E 1998-00 Vortec Vortec 371015     GM 2000-03 4L60E LS1 truck 4.8, 5.3, 6.0 371016     GM 1993-94 4L60E V8 371030     GM 4L60E 1995 truck V8 371035     GM 4L60E 1993-94 4X4 Vortec   371410   GM 4L60E 1995 4X4 Vortec   371415   GM 4L60E 2000-03 LS1 4X4 4.8, 5.3, 6.0   371416 37141722   GM 4L60E 1996-97 4X4 Vortec   371420   GM 4L60E 1998-00 4X4 Vortec   371430   GM 1984-93 700R4, 30-spline V8 371002 371400 3714026 37140120 3714607 GM 1984-93 Diesel 700R4, 30-spline Diesel 371003 371403   Chevrolet TH350 non lock-up, w/ 6" tailshaft 2WD Chevrolet V8, 4.3L V6 311001     Chevrolet TH350 non lock-up, for 203/205 NP transfer case (pre 1980) Chevrolet V8   3116008 3116108,9 31120010 3112109,10 312300 3123019 31230621 Chevrolet TH350 non lock-up, for 208 NP transfer case, 6 bolt dust cover (1980-82) Chevrolet V8, 4.3L V6   31150011 3115109,10 312302 3123049 3123059,11,15 Chevrolet TH350 non lock-up, for 208 NP transfer case, 4 bolt dust cover (1982-up) replaces 700R4 applications Chevrolet V8, 4.3L V6   311700 3117109   Chevrolet TH400, with 4" tailshaft All Chevrolet 21100112 21051017 21100212,18     Chevrolet TH400, for 203 NP transfer case All Chevrolet   211402 2126029 Chevrolet TH400, for 205 NP transfer case (pre 1980) All Chevrolet   211400 21110013 212800 2126009 Chevrolet TH400, replaces 700R4 4X4 All Chevrolet   211401 21110114 21270016 Chevrolet TH400, replaces TH350 4X4     21110219   Buick, Olds, Pontiac TH400 non variable pitch, with 4"tailshaft, large yoke All B.O.P. 21130112

Footnotes 1 1976-1979, for pre-1976 applications contact TCI Tech line at 662-224-8972 2 1980 and up, non lock-up 3 Remote transfer case 4 5" spacer between transmission & transfer case 5 8" spacer between transmission & transfer case 6 Four wheel drive Heavy Duty RV version 7 Non lock-up, still retains automatic shift features 8 4-bolt dust cover 9 Special low gear set installed 10 6 bolt dust cover 11 Replaces 700R4 applications

12 With bolt-on yoke 13 With 229900 adapter installed, replaces pre-1980 TH350 4X4 14 With 229901 adapter installed, replaces 700R4 4x4 & 1980-83 TH350 4x4 15 With 329900 adapter installed 16 With 221500 Trans-Brake installed 17 Diesel applications only 18 Red Eagle® clutches 19 With 229902 adapter installed, replaces TH350, 1980 & later 20 Full engine braking & TCC operation in all forward gears 21 Full engine braking 22 Built to Super StreetFighterT specs.