TH350 Banner Rebuild Kit, new and ready to install. Fits the TH350. Ships fast from the USA.
A banner kit is the middle ground for a Turbo 350 overhaul: more than a gasket set, less than a master kit. This one combines a TH350 overhaul gasket and seal set with new clutch friction plates made to OE specification, the soft parts that wear out in a stock unit. It is the kit to grab when your Chevelle, Nova, Camaro, Cutlass, LeMans or C10 pickup has started slipping between gears or engaging late, the pan is full of dark fluid, and the case is weeping from the front seal, the rear seal and the pan gasket at once. If your hard parts, steels and bushings measure good, this covers the rest of a stock-duty rebuild.
Every gear in a TH350 comes from a clutch pack or band holding a part of the gearset against engine torque. The forward clutch is on in all forward gears, the intermediate clutch with its roller clutch gives 2nd, and the direct clutch adds 3rd and Reverse. Each pack works only if two things are healthy: the friction lining that grips the steels, and the seals that let the piston build pressure. Over years of heat both fail together. The new frictions in this kit restore holding power, and the overhaul set restores the sealing: case and valve body gaskets, the pump gasket, the pan gasket, front and rear seals, and the piston seals and O-rings inside the drums. Stock-grade OE-style frictions are the right choice for a stock or lightly modified engine. For a hot street car or a tow rig, the performance TH350 high performance kit for 1969-1986 adds upgraded frictions, steels, a band and bushings.
The TH350 is fully hydraulic, so there are no trouble codes to read. Diagnosis comes down to fluid condition, linkage and a pressure gauge.
Before you commit, rule out the cheap fixes. A leaking vacuum modulator, a misadjusted kickdown cable or simply low fluid can all make a healthy Turbo 350 shift soft and late. Fresh fluid and filter will not cure a burned clutch, but they will tell you how bad things are once you see what is in the pan. Our TH350 common problems and fixes guide matches each slipping gear to the clutch responsible, and the TH350 rebuild cost guide explains which hard parts tend to push a rebuild past a soft-parts kit, such as a cracked intermediate overrun race or a worn accumulator bore.
This kit is listed for the GM TH350. The Turbo 350 ran from 1969 through 1986 and changed along the way: clutch plate counts vary by model code, and the later TH350C lockup units use different valve body gaskets than the early non-lockup cases. Read the model code on the case and count the plates in your old packs before you start, and if you are unsure which gasket set your unit needs, send us the year and VIN before ordering. See every Turbo 350 part on our TH350 collection page.
Since the unit is already apart, it is the right time to install a TH350 sprag clutch if the old one is worn, and a transmission cooler to keep the new frictions out of the heat that killed the old ones.
| Fits | TH350 |
| Part type | Banner Rebuild Kit |
| Condition | New |
| Brand | OEM |
| Reference | GM350 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
A banner kit combines the overhaul gasket and seal set with new friction plates. A master kit usually adds steel plates, a band, bushings and a filter. Choose the banner kit when your steels, bushings and band are still in good shape.
The listing describes an overhaul rebuild kit with new OE-style clutches. Plan on reusing your steels if they are flat and unburned, and buy bushings and a filter separately if your unit needs them.
The TH350C lockup units built from late 1979 on can use different valve body gaskets than the early non-lockup cases. Send us your year and VIN or the case model code and we will confirm before it ships.
These are OE-style frictions for stock and mild builds. For a high-torque street engine, towing or racing, a performance kit with upgraded frictions and a high energy band holds more torque.
Use any current licensed DEXRON VI ATF; it replaces the DEXRON II the TH350 was built for. A dry unit and converter take roughly eight quarts plus the cooler, so have about three gallons ready.
