I've used it on my tranny and so far so good. here's what they say about it:
SEA FOAM TRANS TUNE
Automatic Transmission and Power Steering Tune-Up Formula
Cleans gum & varnish
Smoothes rough and erratic shifting
Maintains smooth operation
Auto-transmission flush
Power steering and rack and pinion flush
Cleans and dries hydraulics
Works and Performs Instantly
Conditioner that is not a stop leak
Cleans sticky valve bodies and governors
Use to flush power steering and rack and pinion units
Safe, fast, and reliable
A 100% pure petroleum product. SEA FOAM TRANS TUNE is a conditioner that is not a stop leak and is entirely compatible with all automatic transmission, power steering and hydraulic units.
When to Use SEA FOAM TRANS TUNE
For peak performance use SEA FOAM TRANS TUNE as directed when changing transmission fluid as preventive maintenance and to keep parts clean and maintain proper performance.
When erratic shifting is experienced, add 1/2 pint as directed to restore smooth performance. Do not overfill. Fluid can be changed at regular service basis.
When flushing is required prior to installing a new rack and pinion, use TRANS TUNE as directed.
Results Used in Automatic Transmission
Smoothes rough shifting, skip shifting, and slow shifting.
Removes harmful gum, varnish and moisture deposits from valve bodies, governors and other internal parts.
For Use in Automatic Transmissions
With transmission at operating temperature, check the fluid level. Add 1/2 to 1 pint TRANS TUNE to the transmission fluid. This normally will not overfill the fluid level, however, the fluid level should never exceed the manufacturers recommended level.
For best results use 1/2 to 1 pint TRANS TUNE in the transmission fluid prior to a transmission flush or fluid and filter change. Drive at least five miles shifting into all gears. If you are not able to drive the vehicle, shift into all gears for about 3 minutes with the brake or parking brake applied. This will allow TRANS TUNE to clean transmission valves and parts in each area. When additional cleaning is necessary add 1/2 pint of TRANS TUNE to the transmission fluid and change the transmission fluid on a regular service basis.
A PROPERLY MAINTAINED AND CLEAN TRANSMISSION WILL RESULT IN SMOOTHER OPERATION AND LONGER LIFE!
Results of Power Steering Flush
Prolongs power steering and rack and pinion life.
Thoroughly cleans power steering system before installation of new rack and pinions and Power Steering Pumps.
For Use in Power Steering Units
If rack and pinion or power steering pump replacement is necessary, be sure system is flushed before installing new rack or flush for preventive
maintenance.
To flush the power steering unit, drain power steering pump reservoir and fill the reservoir with 1/2 pint of TRANS TUNE. Run engine to pump fluid through system for 15 to 30 minutes, turning the steering wheel from lock to lock every 5 minutes. This will dissolve varnish and suspend contaminants into the fluid. Stop engine and drain fluid from reservoir placing the return line in drain pan. Cap reservoir. Disable ignition. Turn engine off with starter and run 1 1/2 pints of TRANS TUNE through power steering reservoir to flush system of all contamination. Then flush system with power steering fluid.
After flush is completed refill reservoir with new power steering fluid.
A properly maintained transmission and power steering unit results in smoother operation and longer transmission and steering unit life.
For Use in Hydraulics
Add 1 pint of TRANS TUNE to every four gallons of hydraulic fluid, to dry moisture and clean varnish from valves. For best results, use prior to changing hydraulic fluid.
When additional cleaning is necessary add 1 pint of TRANS TUNE to every 8 gallons hydraulic fluid and change hydraulic fluid on a regular service basis.