Description
Review this item in the context of the repair, installation access, nearby parts, and the result the completed job is intended to achieve.
| Manufacturer |
Hapco Products Co. |
| Brand |
Hapco |
| Is Discontinued By Manufacturer |
No |
| Manufacturer Part Number |
800 |
Hapco Slick Shift – Transmission Fix eliminates slip, chatter and hesitation in all transmissions. Formulated to quickly remove sticky gum and varnish buildup on friction surfaces. The cleaning and lubricating properties of Slick Shift help restore fast, sure shifting of gears and smooth acceleration. For Best Results: Add one 16 oz. bottle of Slick Shift directly to transmission reservoir when gum/varnish buildup is suspected. (Any slippage or unusual acceleration can be a sign of minor varnish buildup.) Drive vehicle for a minimum of 30 minutes to thoroughly clean the transmission. After gum and varnish are removed and performance is restored, filter and fluid should be changed after 50 to 100 miles of driving. Compatible with all transmission fluids.
Vehicle information
Available fitment details
Listing compatibility notes
- Use to restore smooth shifting and acceleration Removes gum and varnish buildup in transmissions Lubrication agent helps prevent future varnish buildup Safe for all automatic and manual transmissions Compatible with all transmission fluids Manufacturer Hapco Products Co.
- Compatible with all transmission fluids.
Fitment data is provided as a buying aid. Verify the listing against your vehicle and existing part before ordering.
Repair scenarios, installation, companion parts, and use outcomes
Buying guidance
Quick decision
Review this transmission in the context of the repair and the surrounding components.
Repair scenario
- Identify the symptom and confirm that this is the component required by the repair.
- Inspect nearby connectors, fasteners, and mating surfaces before installation.
Installation notes
- Use the listing instructions when present and follow the vehicle service procedure.
- Professional installation may be appropriate when the repair requires special tools or calibration.
Companion parts
- Inspect nearby fasteners, connectors, seals, fluids, and wear items before starting the repair.
- Use the service procedure and the visible package contents to identify any additional parts or tools required.
Before you buy
- Compare the listing title, photos, package contents, and specifications with the part being replaced.
- Confirm vehicle compatibility and installation requirements before ordering.
Customer feedback
Ratings and written reviews
4.3 / 5
31 source ratings
Source: Amazon. Imported marketplace feedback is shown for product research and is not a review of a purchase made on this website.
Marcos T Leal –
Easy to install and seems to fix my slipping issue when shifting
IBBill –
Not perfect- BUT Good
Hattie Mae. –
This product works so great my transmission shift really great since I used this.
Bonnerro –
I bought a 928 that had slippage in the shifting. We took Some of the old transmission Fluid out and added the slick shift. Drove it around the block and now it doesn’t slip. Amazing! Most transmission shops didn’t want to touch my car. This product made a difference! Thank you.
Rich B –
I had my doubt this would workAfter I put it in, it was a matter of a few miles that I noticed how the transmission not only shifted better but was much quieterHope it lasts
E U Franklin –
I was having serious issues with transmission performance. It was lunging and jerking and making a terrible rattling noise. My mechanic told me to get some Slick Shift. He had put some in his wife’s car and it made a tremendous difference. So I did the same. My car is 13 yrs old and I was nothing short of amazed!!!! It runs like it did the day I bought it! I highly recommend Slick Shift!
Char –
I have a 2002 Subaru Outback H6 with a 4eat, and when I bought it there was an issue with the transmission slipping when cold. Mostly when going from a standstill, and hard shifts as well.I did a drain/fill on the transmission, and first added this Slickshift and then completed the fill procedure with high quality ATF.The slipping issue is completely gone now, done about 1k miles on it and it runs great now! Sometimes it still has some hard shifting, but nothing too bad for a car with 240k!