TH350 Valve Body 1968-1979, used and ready to install. Fits the TH350. Ships fast from the USA.
A 1968-1979 Chevrolet, GMC, Pontiac, Oldsmobile or Buick with an early TH350 that shifts harsh, slips between gears, or hesitates before engaging doesn't always need a new-production or performance valve body to get back to normal - a tested, direct-fit used unit covers the job at a lower price, and it carries our 1-year warranty so you're not gambling on a used part.
The valve body is the hydraulic control center of the TH350. It takes line pressure from the pump and routes it through a casting full of precision bores and spool valves to apply the clutch packs and bands that make each shift happen. On the early 1968-1979 production run, wear in those bores from age and mileage shows up the same way it does on a later TH350 - the transmission keeps running, it just starts shifting worse.
Harsh or slipping shifts on an early TH350 can come from the valve body, from a maladjusted or leaking vacuum modulator, or from worn clutches further inside the case, so it's worth checking which one you actually have. Our TH350 valve body problems and testing guide covers how to isolate a worn bore from a modulator or governor issue, and our delayed engagement guide covers the hesitation-before-engaging symptom specifically.
This is an earlier-production casting for 1968-1979 applications. The TH350 went through several updates between its 1968 introduction and the end of production in 1986, and a later casting isn't always a drop-in match for an early one, so confirm your current valve body's casting number against this listing or send us your year and VIN before ordering. See the full TH350 parts collection for later-year and performance versions if your application falls outside 1968-1979.
Drop the pan and change the filter and gasket at the same time you install the valve body so debris from the old unit doesn't circulate through the new one, and torque the case bolts in sequence to spec. Refill with Dexron ATF and recheck the vacuum modulator adjustment once it's buttoned up, since a modulator that's off will make even a good valve body shift wrong. Because this is a used unit going into an older transmission, it's worth resealing the case while you're in there with a metal-clad external reseal kit, and checking the sprag clutch for wear if the transmission has any real mileage on it.
| Fits | TH350 1968-1979 |
| Part type | Valve Body |
| Condition | Used |
| 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.
Used - it's a direct-fit replacement core backed by our 1-year warranty, priced below a new-production or performance unit for buyers who just need the transmission shifting correctly again.
It's built for the earlier 1968-1979 production run. The TH350 had several casting updates through 1986, and a later casting isn't always a drop-in match for an early one, so confirm your casting number or send us your year and VIN.
Harsh or flared shifts, slipping between gears, and hesitation before engaging Drive or Reverse, when the cause is a worn valve body rather than the modulator or clutches.
The valve body itself against defect for one year from purchase. Fitment should be confirmed against your casting number before installing, since an early TH350 valve body is not interchangeable with every later casting.
The vacuum modulator and governor both affect shift timing and feel on the TH350. Our testing guide covers how to isolate those from a worn valve body before you install a replacement.
Dexron ATF.
