Car Craft
Click here to find out more!

TCI Torque Command 904 Transmission - Inside The Aftermarket 904

What Do You Get With An Aftermarket Transmission? We'll Show When We Look.

Photography by

'You haven't seen it yet, but we've parked the 480hp 370 we built in the Jan. '06 issue in the engine bay of the CC/Rambler, right in front of the leaky three-speed automatic from the '72 Gremlin we pulled from the wrecking yard. Yes, we knew we were going to need a rebuild and were scouting local transmission guys when we thought about looking to the aftermarket for an already rebuilt and race-ready transmission like the one we found from TCI.

Yes, it is a Chrysler transmission, and yes, you can bolt a version of the 904 TorqueFlite up to your small-block A-Body Mopar. The 904 we are talking about has the AMC-patterned housing that first appeared in 1972 and was called the Torque Command, a name patterned after the original Borg-Warner Shift Command that AMC used before 1972. So why do you care? Using the closely related AMC 727 Torque Command housing, Chrysler 904 internals, and a Powerglide tailshaft, you have a transmission that is as light as a Powerglide and has an extra gear. ProFlite builder Marv Ripes from A-1 Automatic Transmissions claimed this hybrid is being used in Super Stock, Modified, and Comp Eliminator cars making over 1,300 hp running 9.0 at 190 mph. You can also buy a housing adapter and mate this transmission to Ford, Chevy, or Chrysler engines.

Obviously, the holy grail combination is a built AMC 727, but since we are making 480 hp instead of 1,300, the slightly modified 904 is perfect for a lightweight car. The AMC 904 weighs 115 pounds, whereas the 727 weighs in at 135-140 pounds, and to keep it inexpensive, the TCI 904 costs around $1,000 compared with the ProFlite that will cost you at least twice that much. The AMC transmissions also have the preferred bellhousing for non-Chrysler or AMC conversions with slimmer dimensions, a lower inspection cover for easy torque-converter access, and a swap-friendly bolt pattern. The final highlight is the First-gear ratio of 2.74 instead of the standard 2.45 you get with the TorqueFlite.

So we found a rad little transmission for about a grand that TCI rates to 450 hp, has a steep First gear, weighs 25 pounds less than the 727, and is small enough to fit into the little '60s two-door post.

PARTS
DESCRIPTION PN PRICE
TCI Torque Command 904 601100 $1,009.69
TCI 10-inch StreetFighter 751600 432.88
Transmission dipstick 22160 74.02
Royal Purple transmission fluid 8.95/quart
727/904 GEAR RATIOS
Transmission First Second Third
AMC 904 2.74 1.54 1.00
Chrysler 904 2.45 1.45 1.00
Chrysler 999 2.74 1.45 1.00
Chrysler 727 2.45 1.45 1.00
AMC 727 2.45 1.45 1.00
FLUID LEVELS
Dry transmission 5 quarts
Dry converter 3 quarts
*Fluid and filter change 4-5 quarts
*Frothy fluid indicates high fluid;
slipping between shifts or delayed
engagement indicates low fluid.
SOURCES
Race Trans
Sun Valley
CA
A-1 Automatic Transmissions
7359 Canoga Ave.
Canoga Park
CA  91303
Turbo Action
1535 Owens Rd.
Jacksonville
FL  32218-1639
904-741-4850
Royal Purple
Milodon
2250 Agate Ct.
Simi Valley
CA  93065
805-577-5950
www.milodon.net
TCI Automotive
151 Industrial Dr.
Ashland
MS  38603
662-224-8972
www.tciauto.com
Powerbuilt Tools/Alltrade
Long Beach
CA
alltradetools.com
  • «
  • |
  • 1
  • |
  • 2
  • |
  • 3
  • |
  • View Full Article
Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!
0 comments
Car Craft