TH350 Clutch Drum 1969-1979, remanufactured and ready to install. Fits the TH350. Ships fast from the USA.
A TH350 that has Reverse but no Drive, creeps in Neutral, or slips on every forward take-off is pointing at the forward clutch. This is a remanufactured forward clutch drum for 1969-1979 non-lockup TH350 transmissions in Chevrolet, GMC, Pontiac, Oldsmobile and Buick cars and trucks. It is the housing that carries the input shaft, and it comes assembled with five new high-energy frictions, five reconditioned steels, the pressure plate, the wave (cushion) plate, the piston with spring retainer, two snap rings and a bearing. You drop in a finished forward pack instead of rebuilding a drum that may have a scored shaft or a stuck check ball.
The input shaft is splined to the converter turbine and pressed into the forward clutch housing, so this drum turns with the turbine at all times. When you select any forward range, line pressure fed through two sealing rings on the pump hub applies the forward piston, and the pack drives the input ring gear. The forward clutch stays on in first, second and third; the other clutches and the roller clutches decide which gear you get. Because it works in every forward gear, a weak forward pack hurts the whole drive range, while Reverse, which uses the direct and low-reverse clutches, can feel normal.
Start with fluid level, the manual linkage and the filter, then take line pressure in Drive. If pressure is normal and the unit still will not pull, the forward circuit is leaking or the pack is burned. GM lists a cracked piston, missing seals, burned plates, broken pump hub rings and a stuck or missing ball check in the drum. On the bench, look at the input shaft ring lands and the ball check exhaust before replacing anything else. Our TH350 delayed engagement guide covers the pressure checks, and TH350 pump failure symptoms helps you rule out a weak pump.
This drum fits 1969-1979 TH350 transmissions without a lockup converter only. The TH350C lockup version phased in from late 1979 is not covered by this drum. If your transmission has a wiring connector on the left side of the case, it is a TH350C and this is the wrong drum. When in doubt, send the year and VIN or a photo of your case and old drum. You can see the full range on our TH350 parts page.
Since this drum already carries new frictions, round out the rebuild with a 1969-1979 TH350 master rebuild kit for gaskets, seals and bushings, and replace the direct pack with a loaded TH350 direct clutch drum if that side is worn too.
| Fits | TH350 1969-1979 |
| 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.
Yes. The forward clutch housing carries the pressed-in input shaft, as shown, along with five new frictions, five reconditioned steels, the pressure plate, wave plate, piston with spring retainer, two snap rings and a bearing.
No. It is for non-lockup 1969-1979 TH350 units only. The TH350C lockup transmission phased in from late 1979 is not covered. A case with an electrical connector on the left side is a TH350C.
That pattern points to the forward clutch, because Reverse does not use it. Confirm line pressure in Drive and check the pump hub sealing rings before replacing the drum.
Measure between the pressure plate and the top friction with a feeler gauge. GM calls for .011 to .082 inch and offers three pressure plate thicknesses to correct it.
DEXRON ATF. Use a current licensed DEXRON fluid and check the level on the dipstick at operating temperature.
