TH350 Valve Body 1969, new and ready to install. Fits the TH350. Ships fast from the USA.
1969 was the first model year for the TH350, and the early valve body shares the same basic hydraulic circuits as the rest of the three-speed's long production run, but it is worth matching the year rather than grabbing a later revision and hoping it bolts up the same. This is a new TransGo valve body built specifically for the 1969 TH350, so if your GM car or light truck from that first model year is shifting harsh, slipping, or hesitating to engage, you are installing a part made for that exact early unit rather than a generic later casting.
The valve body sits between the pump and the clutch packs and bands, and its job is to take line pressure and route it through a set of precision bores and spool valves so each shift happens at the right pressure and the right moment. On the 1969 TH350 this circuit is in its original form, before later running changes, so wear in the boost valve or accumulator bores produces the same family of harsh-shift and slipping complaints that show up on every TH350 built after it.
Since a 1969 TH350 is now over five decades old, rule out a simply low or burnt fluid level before condemning the valve body. Our TH350 fluid type and capacity guide covers the correct Dexron fill and quantity, and the TH350 valve body testing guide walks through the vacuum-gauge method for isolating a worn bore from a simple fluid or linkage issue once the fluid itself checks out.
This valve body is built for the 1969 model year TH350 specifically. The TH350 carried several internal updates across its 1969-1986 run, so a valve body from a later year is not a guaranteed direct swap onto a 1969 case even though the transmission shares the same name. If you are not certain your vehicle has the original first-year unit, confirm the casting and modulator location before ordering, or send us your VIN and we will verify it for you. See everything else we carry for this transmission on the TH350 parts page.
Drop the pan and renew the fluid and filter at the same time as the valve body, since debris left over from the worn unit will start the same wear pattern in the new one. Torque the bolts in sequence to the factory spec rather than all at once, and refill with Dexron ATF to the correct level with the transmission warm. On a transmission this old it is worth checking the rest of the hard parts while you are in there; our TH350 rebuild kit with Raybestos frictions and TH350 sprag clutch cover the components that wear out alongside an early valve body.
| Fits | TH350 1969 |
| Part type | Valve Body |
| Condition | New |
| Brand | TransGo |
| Reference | TH250 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is built specifically for the 1969 model year TH350, the transmission's first year. The TH350 received internal updates through its 1969-1986 run, so a later-year valve body is not a guaranteed direct swap onto a 1969 case.
New, built by TransGo for the 1969 TH350. It carries a 1-year warranty.
Harsh or flared shifts, slipping between gears, delayed engagement into Drive or Reverse, and inconsistent shift points from governor wear. On a transmission this old, confirm the fluid level and condition first before assuming the valve body is at fault.
Dexron ATF. Our fluid type and capacity guide covers the refill quantity after a pan drop and the correct level to check against once the transmission is at operating temperature.
On a transmission this old, check the clutch frictions and the sprag clutch at the same time, since both wear out alongside the valve body and both are available separately if the rest of the unit tests good.
No. The TH350 is a fully mechanical-hydraulic transmission with no onboard computer, so there is no adaptive relearn. Confirm the modulator connection and road test for shift quality.
