TF-80SC Overhaul Kit 2005-12, new and ready to install. Fits the TF-80SC. Ships fast from the USA.
If your 2005-2012 Volvo XC90, S80, V70, XC60 or XC70, Saab 9-3 or Cadillac with the Aisin six-speed is leaking at the axle seals, weeping around the pan, or slow to engage when cold, the rubber inside the transmission has likely gone hard. This is the Precision International K79900GAX overhaul kit for the TF-80SC, also sold as the AF40. It is the sealing side of a rebuild only: paper gaskets, rubber O-rings, lip seals, metal-clad seals and sealing ring kits. It does not include pistons, friction plates or steel plates, which keeps the price down for a reseal or for a builder who is reusing good clutch packs.
Every shift in this transmission is a pressure event. The TCM fills one clutch or brake through a linear solenoid while it exhausts another, and the timing depends on oil reaching each piston without bleeding off along the way. The sealing rings on the rotating shafts carry apply oil into the spinning clutch drums, the piston O-rings keep that oil behind the piston, and the gaskets between the valve body, separator plate and case keep each circuit separate. After 100,000-plus miles of heat cycles those parts shrink and harden. Pressure leaks off during the fill, the clutch comes on late and soft, and the control unit keeps adapting until it cannot compensate. Renewing the seals restores the pressure the valve body was designed to deliver, and the outer lip seals stop the external leaks.
Decide whether you have a sealing problem or a worn-clutch problem before you order. Clean fluid with a cold-engagement delay points to seals; dark, burnt fluid with friction material in the pan means the packs are gone too, and a seal kit alone will not save it. Our guide to shift flare vs. slip helps separate the two. Check the fluid level hot first: on Volvo models that means 50 to 60 degrees C on the TCM with fluid just dripping from the check plug, because a low level produces the same delays. If heat seems to make everything worse, read Aisin overheating causes as well.
The listing covers the TF-80SC (AF40 / AF4) for 2005-2012. The application chart for this kit includes the Saab 9-3 (2006-2009), Volvo S60/R (2005-2007), S80 (2006-2009), V70 and XC70 (2008-2009), XC60 (2008-2009) and XC90 (2005-2009), Cadillac BLS (2006-2009) and SRX (2009), Jaguar X-Type (2008-2009), Buick Regal 2.0L (2011-2017), plus Opel, Peugeot, Citroen, Alfa Romeo and Renault models. It does not list Ford, Lincoln, Mercury or Mazda, which used the TF-81SC; for those, see the TF-81SC overhaul kit. The two kits look alike but the parts are not interchangeable, so match the model on the transmission plate or send us your year and VIN. Browse the rest of the family in our Aisin transmission collection.
| Fits | TF-80SC 2005-12 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. The K79900GAX contains paper gaskets, rubber O-rings, lip seals, metal-clad seals and sealing ring kits only. Pistons, friction plates and steel plates are not included.
No. Those vehicles use the TF-81SC, which needs its own overhaul kit. This kit's application list covers TF-80SC (AF40) vehicles such as Volvo, Saab, Cadillac and Opel.
Yes, the lip seals are included, but if that is your only leak the axle seals can often be replaced without a full teardown. The full kit makes sense when the unit is coming apart anyway.
A JWS 3309 type ATF. Volvo part numbers are 1161540 or 1161640 for early units and 31256774 or 31256775 later. Check the level hot, at 50 to 60 degrees C, at the level plug.
Yes. Reset the TCM adaptations with a scan tool and drive through every gear so the control unit relearns the new clutch fill times.
