Shift Kits TRANSGO Reprogram Automatic Transmissions

transcologo.gifTRANSGO Kits instantly re-program automatic transmissions for high performance and durability.  

Unique kits re-calibrate the transmission to shift far more efficiently
Factory programming includes an excessive amount of overlap 

Need help identifying which
domestic automatic transmission you have?

Need help identifying which import automatic transmission you have?

Shift Enhancement Kits are different they fix know fractory defects in Automatics 


In terms of performance and durability for an automatic transmission, the most important improvement that can be made is to re-program the Control Assemblies. These assemblies regulate the functions of the entire transmission; 95% of shift performance comes from programming.
Installing a Trans-Go Re-programming Kit will instantly improve the whole personality of your GM or Chevrolet, FORD and CHRYSLER automatic transmissions.


Factory programming achieves comfort.

The automatic transmissions coming off the assembly lines in Detroit are truly masterpieces of engineering. But engineers have been asked
to program the shifting for smoothness and comfort. Also, consumer attitude surveys show that drivers believe a soft, smooth shift is easier
on the transmission. Actually, just the reverse is true.

To add comfort, Detroit designers have had to subtract a considerable amount of efficiency and durability. They have
achieved comfort by extending the time duration of every shift. Not only does power slip away during this extended shift,
but all friction surfaces receive excessive wear because they are asked to work overtime.


The stock automatic takes longer to complete each shift. Points A to B, Figure 1 show only mild acceleration. During this period only a partial power condition exists because the friction
elements are slipping.

This extended slipping time prevents the inertial energy from being efficiently utilized. It is lost in the form of heat on the clutches and bands, instead of being utilized for forward motion. Continually operating a stock automatic at full throttle will cause early friction element failure.

To get high performance and improved durability in an automatic, we must improve the way it executes every shift.

Trans-Go re-programming achieves durability and performance.

So if you are willing to accept a faster shift, which will subtract some comfort, you can restore full performance and durability. This is exactly what a Trans-Go Re-Programming Kit does for you. It makes each shift faster and more efficient. As a result, durability of the transmission is immediately doubled.

Re-Programming Goal:Make the shift
faster without losing precision.





The problem now becomes clear that what we need is re-programming that will precisely control the complicated chain of events that occur
during every shift and do it in a far briefer span of time.


This is exactly what Trans-Go has accomplished. Trans-Go kits cut slipping time by more than 70% (even more in the
Competition version) and at the same time improve the quality of the shifting action itself. Figures 1 and 2 show the results.


The automatic with a re-programming kit installed now shifts fast enough to take advantage of inertial energy from rotating mass, including the inertial energy from the transmission itself. Notice also the higher speed recorded (C) as the curve leaves the chart. In driving this conversion at full throttle a sudden forward lurch can be felt when it shifts, very similar to a power-shifted 4-speed.

You get better control and back to low at any speed.


Trans-Go kits give you more complete gear control of your transmission. Most kits offer Shift Command, a special feature of our re-programming that allows you to shift back to low at any speed! Trans-Go kits also retain fully automatic shifting in the "D" position.

As the elapsed time of shifting is decreased, the life
of the transmission friction materials is increased.
Installing a Trans-Go Re-Programming kit will at least double the life of the friction materials in the transmission. In many heavy duty applications, a Trans-Go kit has made the difference
between a few months service without repair and several years.




The shorter shift time allows the friction elements and gears far less time to wear themselves out. The useful life of the
friction elements in a transmission is directly related to the amount of slipping that is allowed to occur during shifts.

Slipping converts useful energy to heat on the surface of the clutches and bands. This heat transforms the friction material
to ash, which polishes its mating element, causing further slipping, heat and deterioration of the friction elements.

The gears receive less wear, too. A slow shift causes them to be partially engaged for a longer period during the gear
changing process, resulting in unnecessary heat, wear and power loss.

Are quicker shifts all that matters?

Not by a long way. We have seen what can be gained in durability and performance with quicker
shifts. Overlap is also extremely important. Overlap is a condition caused by applying a gear before
the previous gear has been released. 
Excessive overlap as seen in the Fig. 3 converts engine horsepower into damaging heat and causes clutch wear, band wear, shift delays, short oil life, and increased gasoline usage




Factory programming includes an excessive amount of overlap.

This is done purely for smoothness. Overlap causes delayed shifts. Overlap is the main cause of shift delay, or hesitation when shifting manually.

Excessive Overlap is eliminated with Trans-Go Re-Programming. The difference is felt immediately and there are substantial increases in
performance, durability and fuel economy.

The TransGo Performance Shift Kits provide the Durability, Firmness and Control with the convenience of no transmission removal required.

Find your application in the following table. 

General Motors  

Your Cost

PG (Powerglide) 1963-73 Full Manual or automatic shifts, Full-race, Street and Strip use.  


TRS44173 THM 350 1969-up Stick shift; Competition, off road and pro-street. Full manual control; converts back to automatic. NonLockup.  


TRST44171A (Lockup 350) THM 350 1981-91 Automatic Shift; Street or full-race; Holds 1st 2ND and 3rd at any RPM. Backshifts at your command. Total cure for soft 2-3 shift and direct clutch failure. Fits lockup transmission.  HD and Competition  


TRST34169 THM 400 1965-95 Automatic shift; Street or full-race; Holds 1st and 2ND at any RPM. Backshifts at your command. Tow and Go and competition combination. Patented feed fixes weak 3rd  


T34173 THM 400 1965-up Cancels all automatic shifts - puts the driver in control of all shifts by moving the shift lever. Full race, competition, off-road, converts back to automatic.  


TRST425-1 THM 425 1966-79 Tornado, El Dorado, GMC motor homes Firmer shifts; complete gear control, holds 1st, 2nd and 3rd to any rpm. Backshifts to 3rd, 2nd and 1st at any rpm  


TRST74173E 4L60E (700 Electronic) 1993-2001 Stick shift; full manual control, converts back to automatic. Competition, off-road and pro-street, holds 1st, 2nd and 3rd to any rpm. Backshifts to 3rd, 2nd and 1st at any time. For transplant or use with no electrical. Also order 46-MOD.  


TRSA74507EK 4L60E 1993-97 Boost valve kit: Increases pressure rise response for heavy duty and high performance use. Essential for police vehicles and working trucks. .500 valve and bushing.  


TRST74171E 4L60E (700 Electronic) 1993-1997 Crisp muscle car shifts, High Performance & Sport Truck. Puts the driver in command. Holds 1st, 2nd, and 3rd to any speed. Backshifts to 3rd, 2nd and 1st at any rpm.  


TRST34173E 4L80E 1991-2001 Cancels all automatic shifts - puts the driver in control of all shifts by moving the shift lever. Includes 48-MOD (vacuum controlled line pressure)  


TRST34169E 4L80E 1991-2001 Ends direct clutch burnup. Holds BIG horsepower. Holds 1st, 2nd, and 3rd to any speed. Backshifts to 3rd, 2nd and 1st at any rpm. Prevents broken case and drum due to high pressure.  


TRST74171 TH700 1981-up Holds 1st-2nd-3rd at any RPM. Backshifts at your command. Reduces the chance of band/ clutch failure. (Stick Shift option included)  




TRST76173 (4R70W) AODE 1991-2001 Stick shift i,e, short firm shifts with class. high Performance - Full manual control. Reduces the chance of band failure and shudder.  


TRST76171 AOD 1983-up Firm muscle Short firm shifts with class. Holds 1st-2nd-3rd at any RPM. Wide open 3-4 shift. hold 4th at high speed, includes AOD-HIREV.  


TRST76171E (4R70W) AODE 1991-2001 Short, firm, full-throttle shifts that have "class" performance and durability. Back shifts to any gear at your command. Holds the gear you select to any rpm. Includes EPC bypass to prevent parts breakage.  


C4-40-2 C4 1970-up Auto shift, competition, off road and pro-street  


TRS-T26171A C4 1970-up Stick shift, competition, off road and pro-street. Full manual control, converts back to automatic shift.  


C4-45-01 C4 1965-66 Auto shift, heavy duty, towing & competition  


C4-47-1 C4 1967-69 Auto shift, heavy duty, towing & competition  


C4-47-2 C4 1967-69 Auto shift, competition, heavy duty & towing  


C4-47-3 C4 1967-69 Stick shift, competition, off road and pro-street. Full manual control, converts back to automatic shift  


C6-67-1&2 C6 1967-up Except Diesel Auto shift, competition, off road & heavy duty  


C6-67-3 C6 1967-up Except Diesel Stick shift, competition, off road and pro-street. Full manual control, converts back to automatic shift.  


TRST36169E (4R100) New-Improved E4OD 1989-2001 4R100 1998 up Trucks & Vans Gas or Diesel Automatic shift, heavy loads, off road, pro-street and competition. Holds 1st, 2nd and 3rd to any rpm. Backshifts to any gear at any rpm 89095 only. New calibration system with broader range adjustment Greater performance and durability.  


T106173 FM-2 FMX 1967-83 Full manual control, competition, off-road and pro-stock. Optional stick sift. Greater performance and durability.  




TRS48C01 Neon, Caravan, early PT Cruiser, Sprit, Acclaim, 3 speed Mild to Wild, three different setting (at time of installation) improve performance, fix known problems to full manual shift.  


TF1 Torqueflite 1960-up Crisper shifts with greater durability, puts the driver in command. Goes back to low at any speed. Fixes 2-3 bind up.  


TF2 Torqueflite 1960-up Instant full race shifts, puts driver in command, goes back to low at any speed. Fixes 2-3 bind up.  


TF3 Torqueflite 1960-up Rear wheel drive Full Manual Stick shift, instant full race.  


500-518-618 1989-2001 Torqueflite/Loadflite Stick shift, full race, competition, off road and pro street. Full manual control.  


TRST22169B 500-518-618 1989-2001 Torqueflite/Loadflite RE & RH Models Torqueflite Overdrive, automatic shift, street or full race. Holds 1st, 2nd and 3rd to any rpm. Backshifts to 3rd, 2nd and 1st at any rpm. Tow & go and competition combination, includes resistor.  


In addition to automatic transmissions, shift kits, overhaul kits and repair parts we offer free technical support to assist you in solving your automotive problems as well as a large list of the following products to improve your vehicles performance, economy, safety and appearance: