AF40 Shift Kit, new and ready to install. Fits the AF40. Ships fast from the USA.
If your Volvo XC90, S80, V70 or Saab 9-3 with the Aisin six-speed automatic double-bumps on coast-down above 30 mph once it is hot, bangs on a part-throttle downshift, or shudders when the converter locks, the wear is almost always in the valve body's solenoid feed and lockup circuits. This is the TransGo SK TF80SC shift kit, a valve body repair kit for the TF-80SC, sold under the names AF40, AF40-6 and AM6 depending on who installed it.
The AF40 is a front-drive six-speed transaxle with no mechanical shift valves for the driver to feel. Six linear solenoids plus an on/off shift solenoid set every clutch apply, and they all depend on a steady feed pressure from the solenoid regulator valves. Over time those regulator bores and the solenoids' own bushings wear, feed pressure drifts, and the module's adaptive tables chase the error. That is where the second bump on a hot coast-down and the flared kickdowns come from.
The TransGo kit attacks that drift at its source. It includes two drop-in solenoid regulator valve assemblies, a drop-in TCC lockup boost valve assembly, and the parts to renew the pressure control solenoids themselves. The instructions have you resize each linear solenoid's internal bushing with the supplied drills, refit new end caps, enlarge two small orifice holes in the separator plates and install new bonded gaskets, plus new valves and bushings in the lockup and rear valve bodies. In other words it repairs the hydraulic circuits you already have instead of replacing the whole valve body.
Check fluid level and condition first; dark, burnt fluid with friction material in the pan means the clutches are already damaged and a shift kit alone will not fix it. Next, test every solenoid. TransGo's first step is a bench check: 5-7 ohms across the two pins and an open circuit from either pin to the solenoid body. A solenoid that fails either check must be replaced, which is where our solenoid multimeter test guide helps. Our Aisin harsh and delayed shift walkthrough covers sorting a hydraulic complaint from an electrical one on this family.
TransGo lists this kit for the TF-80SC, AF40, AF40-6 and AM6 first generation, with these vehicles: Volvo C30 and C70 (2010), S60 and V70 (2006-2010), S80 (2007-2010), XC60 (2009), XC70 (2009-2010), XC90 (2006-2010), and Saab 9-3 (2006-2010) and 9-5 (2010). TransGo states it does not fit the later AW6AX-EL, AY6AX-EL or AY6A-EL. The same unit went into other makes, but valve body parts and check ball locations differ between models, so if your vehicle is not on that list, send us the year and VIN or the code from the transmission tag and we will confirm before you buy. The front-drive TF-81SC Ford and Mazda unit uses a different kit, the TF-81SC shift kit. See all Aisin six-speed parts in the Aisin collection.
| Fits | AF40 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
TransGo lists the kit for first-generation TF-80SC units, with Volvo applications ending in 2010 and the Saab 9-5 in 2010. It states the kit does not fit the AW6AX-EL, AY6AX-EL or AY6A-EL. Send your VIN if your model year is outside the listed range.
No. The TF-81SC used in Ford Fusion, Milan and Mazda6 models takes a separate TransGo kit. This one is for the TF-80SC, also called AF40, AF40-6 and AM6.
It corrects shudder caused by low or unstable lockup pressure, using a new lockup boost valve and solenoid repairs. If the converter clutch lining is already worn out, you will still need a converter.
Yes. Each solenoid should read 5-7 ohms between the pins and show no continuity from either pin to the body. Any solenoid that fails needs replacing before you rebuild the valve body.
The valve body work is done with the valve body out on a bench, which on most of these vehicles can be done with the transmission in the car. The kit's solenoid repair steps need a bench grinder, drills supplied in the kit and thread locker.
New bonded separator gaskets come in the kit. Fresh fluid, a filter if accessible, and any solenoid that fails the resistance test are the usual additions. A burnt unit needs a rebuild kit instead.
