TH350 Master Rebuild Kit 1969-86, new and ready to install. Fits the TH350. Ships fast from the USA.
This is the kit for builders who want one box to cover any Turbo 350 from the first 1969 units through the last 1986 production, including the lockup TH350C. If your Chevrolet, GMC, Pontiac, Oldsmobile or Buick is slipping between gears, engaging late, smelling burnt or leaking from several places at once, this master kit carries everything that wears in a normal overhaul: a complete gasket and seal set, an Exedy friction module, a steel module, a high energy band, new bushings and a filter.
The TH350 holds its gears with three multi-disc clutches, a low and reverse clutch, one band and a roller clutch, with shift timing set by the vacuum modulator and governor. Every one of those friction elements is in this kit, and so is the steel side of each pack, which is the part cheaper kits leave out. Steels that were run hot turn blue or warp, and a new set of frictions stacked against them is a common reason a fresh rebuild slips again. The high energy band replaces the intermediate band that holds second gear, and the bushing set renews the bores that keep the drums, sun shell and shafts running on center.
Check fluid level and condition hot, test the modulator for a ruptured diaphragm, and confirm the engine is making steady vacuum. A unit that engages late only when cold may have a pump or seal problem rather than burnt clutches; our TH350 delayed engagement guide sorts out those causes. If the unit slips with good fluid and vacuum, it is coming apart, and that is where this kit earns its price.
The kit is listed for 1969-1986 TH350 and TH350C transmissions. The conventional TH350 ran from the 1969 model year, and the lockup TH350C, which has an electrical connector on the left side of the case, arrived late in the 1979 model year. Clutch plate counts differ by model code, so read the code on the case and compare it to the pack you take apart before assembly. If anything does not match, send us your year, model code and VIN. Every other part for these units is on our TH350 parts page.
For the upgrades that make a TH350 last, read our wear points and upgrades guide, and for the pump checks you should make during teardown, see TH350 pump failure symptoms.
| Fits | TH350 1969-86 |
| Part type | Master Rebuild Kit |
| Condition | New |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. It is listed for both TH350 and TH350C transmissions from 1969 through 1986. The TH350C is the lockup version with an electrical connector on the left side of the case.
A complete overhaul gasket and seal set, an Exedy friction module, a steel module, a high energy band, new bushings and a transmission filter. A shift kit and drain plug are not included.
Yes. TH350 clutch plate counts and steel thicknesses vary by model code, so compare the new plates to the packs you remove before assembly.
Dexron ATF. Pre-soak the frictions and the band in it, then set the level hot with the engine running.
Yes. The kit does not include a shift kit, so you can add one for your unit while the valve body is out. TH350C owners can use the TransGo 350C gear command kit.
The intermediate overrun outer race, the 1-2 accumulator bore, the intermediate servo bore, the sun shell, the planetaries and the pump. Inspect each at teardown.
