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Circlematic™ Transmission Applications

TCI® offers competition transmissions for oval track and marine performance applications. Several different options and speciality combinations are available for the Powerglide as well as the TH-350. Standard length transmissions weigh approximately 97 pounds and the rotating assemblies weigh 24.25 pounds in standard trim to less than 20 pounds in lightweight trim.

Our Direct Drive Powerglides eliminate the need for all external control of the line pressure when using a straight pump drive. This design allows you to operate the transmission by simply placing it into gear and easing down on the accelerator. Our TH-350 transmissions provide full engine braking and the the transmisison/converter combonations give you 100% fluid coupling. All transmissions feature high performance clutches, bands, a steel clutch hub (where applicable) and the Powerglides have a modified planetary gear set that will work with the latest rear suspensions.

Part No. Transmission Length Low Gear Ratio Valve Body Drum & Hub Oil Pan Additional Information
7420101
Powerglide 279/16 1.82:1 Manual shift REV Pattern clutch less style 744500 steel drum, steel hub 528300 aluminum, std capacity Clutch less style. Most popular style, recommended for all classes, easiest Circlematic to operate
742011
Powerglide 279/16 1.82:1 Manual shift FWD Pattern internal valve 744300 steel drum, steel hub 528300 aluminum, std capacity Recommended for all classes, can be raced in low or high gear, shift on the fly
742012
Powerglide 279/16 1.82:1 Manual shift FWD Pattern internal valve 744300 steel drum 528300 aluminum, std capacity Low gear only (no high gear), great for short track hobby cars with stock rear end gear rules
742013
Powerglide 279/16 1.82:1 Manual shift FWD Pattern internal valve 744300 Steel drum, steel hub 528321 “Kickout” steel pan for asphalt only For asphalt track racers, kick-out pan prevents fluid starvation in corners 
742014
Powerglide 279/16 1.82:1 Manual shift FWD Pattern internal valve 744300 Aluminum drum and  hub 528321 “Kickout” steel pan for asphalt only Super lightweight version for asphault racers, lightweight planetary & gun drilled output shaft, with billet input shaft 
742015
Powerglide 279/16 1.82:1 Manual shift FWD Pattern internal valve 744300 steel drum, steel hub 528300 aluminum, std capacity Same as 742011 but with the shift lever pointing up for extra clearance in transmission tunnel area
742016
Powerglide 279/16 1.76:1 Manual shift FWD Pattern internal valve 744300 Steel drum, steel hub 528321 “Kickout” steel pan for asphalt only For asphalt track racers, kick-out pan prevents fluid starvation in corners.  Has a 1.76:1 lo gear 
7420171
Powerglide 279/16 1.82:1 Manual shift REV Pattern clutch less style 744500 steel drum, steel hub 528321 “Kickout” steel pan for asphalt only Clutch less style. Most popular style, recommended for all classes, easiest Circlematic to operate. Asphalt only version
742018
Powerglide 279/16 1.82:1 Manual Shift FWD Pattern For working converter 744200 steel drum, steel hub 528300 aluminum, std capacity Full manual design can be raced in Lo or Hi gear.  Use with FastLap Converter
742019
Powerglide 279/16 1.82:1 Manual Shift FWD Pattern for working Converter 744200 steel drum, steel hub 528321 “Kickout” steel pan for asphalt only Full manual design can be raced in Lo or Hi gear.  Use with FastLap converter.  For asphalt use only.
7420202
Powerglide 279/16 1.82:1 Manual Shift REV Pattern Lo gear Only, clutchless style 744600 steel drum, steel hub 528300 aluminum, std capicity Clutchless style, Lo Gear Only.  Easiest Circlematic to operate 
7420212
Powerglide 279/16 1.82:1 Manual Shift REV Pattern Lo gear Only, clutchless style 744600 steel drum, steel hub 528321 “Kickout” steel pan for asphalt only Clutch less style, Lo Gear Only.  Easiest Circlematic to operate.  For asphalt use only.
312020
TH-350 w/converter 279/16 2.52:1 Manual shift standard pattern 3 Speed steel drums & hubs std. steel 100% fluid coupling for maximum engine braking and instant throttle response coming out of turns
312021 TH-350 w/converter 279/16 2.52:1 Manual Shift standard pattern 2-speed Steel drum & hubs std. steel 100% fluid coupling for maximum engine braking and instant throttle response coming out of turns

* Suitable only in oval track and marine applications.

 
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