TH350 Clutch Drum 1969-86, remanufactured and ready to install. Fits the TH350. Ships fast from the USA.
If your Turbo 350 skips second and goes 1-3, or the intermediate overrun race cracked and took the drum hub with it, this is the replacement assembly to look at. It is a TH350 and TH350C direct clutch drum for 1969-1986 GM cars and trucks, supplied with the intermediate roller clutch already sorted: the drum with its pressed-on inner race, the roller clutch, a hardened outer race, the retainer and the snap ring. It is a pre-owned drum in like-new condition. It does not include clutch plates or a piston kit, so it is the right buy when your rebuild kit already covers the direct pack and what you need is a sound drum and overrun clutch.
In GM's layout the direct clutch is the 2-3 clutch. It applies in third and in Reverse, driving the sun gear through the drum. The outside of the drum hub is the inner cam of the intermediate overrun roller clutch. When the intermediate clutch applies for second gear, that roller clutch locks against the outer race and holds the sun gear, then freewheels when the direct clutch takes over for third. The roller clutch is the part that gives you second gear in Drive. If it does not lock, the transmission goes straight from first to third even though manual second still works with the band.
The outer race of this roller clutch is a known stress point on the TH350 and TH350C, and Sonnax and others sell heavy-duty replacement races for that reason. This assembly ships with a hardened outer race, so the part most likely to crack is not a worn original you have to reuse.
A 1-3 shift with good manual second points to the roller clutch rather than the band or the valve body. Pull the pan and look for roller pieces or a broken cage, then confirm on the bench by turning the outer race: it must lock one way and freewheel the other. A no-third or no-Reverse complaint needs a pressure test first, because broken pump hub rings and cut piston seals cause the same thing. The TH350 common problems and fixes guide covers both, and the TH350 valve body testing guide helps rule out a stuck 1-2 or 2-3 valve.
Listed for the TH350 and TH350C, 1969 through 1986, across Chevrolet, GMC, Pontiac, Oldsmobile and Buick applications. Direct drums were built in different plate counts over the years, so count the plates in your old drum and match the piston you are reusing or buying. Also confirm the thrust bearing or washer at the front of your drum. Send the year and VIN or a photo of your old part if anything looks different. Browse all TH350 transmission parts for the rest of the build.
This drum ships without plates. A TH350 master repair kit supplies the frictions, steels and seals, and a TH350 shift kit shortens the 2-3 overlap so the new pack lasts.
| Fits | TH350 1969-86 |
| Part type | Clutch Drum |
| Condition | Remanufactured |
| 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. It includes the direct drum with pressed-on inner race, the intermediate roller clutch, a hardened outer race, the retainer and the snap ring. Plates, seals and the piston kit come from your rebuild kit.
That is the textbook sign of an intermediate overrun roller clutch that is not locking. This assembly replaces the roller clutch and races together with the drum.
With the roller clutch installed four holes toward the front, the outer race should freewheel counterclockwise and lock clockwise, with directions taken looking toward the rear of the car as GM describes them.
Yes, it is listed for both the TH350 and TH350C from 1969 to 1986. Match the front thrust bearing or washer style to the drum you remove.
The TH350 was specified for DEXRON ATF. A current licensed DEXRON fluid is the correct fill; check the level on the dipstick at operating temperature.
