TH400 Master Rebuild Kit 1965-1967, new and ready to install. Fits the TH400. Ships fast from the USA.
Early Turbo 400s are a different animal from the truck units most kits are built around. If you are restoring a 1965-1967 Buick, Oldsmobile or Cadillac, or a big-block Chevrolet with an original Turbo Hydra-Matic 400, and it now slips on the 1-2 shift, flares into 3rd, engages Drive late or smells burnt, this master rebuild kit is put together for that early window. The listing calls out that it covers the switch-pitch ST400 used in those years, so you do not have to piece a 1965-67 job together from later-model parts.
Plan to reuse or source the rear band separately; the listing for this early kit names the front band, while the 1968-up version of this kit names both bands.
The TH400 is a fully hydraulic three-speed. Line pressure is set by the vacuum modulator and pressure regulator, shift timing comes from the governor and throttle signal, and the forward, direct and intermediate clutch packs plus the front and rear bands do the work in each range. In the 1965-1967 Buick, Olds and Cadillac cars there was one more piece: a variable pitch stator in the converter, switched electrically through a two-prong plug on the case, which changed converter behavior for launch and cruise. A master kit replaces everything that wears in normal service, so one teardown restores clutch capacity, sealing and line pressure control at the same time.
Check fluid level and condition on the dipstick with the engine running, then pull the pan and look for clutch lining, brass from bushings or steel glitter. A pressure test separates a leaking circuit from a mechanical failure; our TH400 common problems and fixes guide walks through the usual failures, and the TH400 rebuild wear points guide shows what to inspect once the case is open. If the unit is an early switch-pitch transmission, confirm the two-prong case connector so you know which pump and converter you are dealing with.
This kit is listed for the TH400 from 1965 through 1967, including switch-pitch ST400 units. GM ran the Turbo 400 across many divisions, and early units were built to different specs than the 1968-up transmissions, so match your case and pump against your kit before you order. If you are not sure what you have, send us the year, the vehicle and the VIN, or the code from the transmission ID plate, and we will check it. For a 1968 or later unit, see the TH400 master rebuild kit for 1968, and browse every early and late part on the TH400 parts page.
If the pump body or stator support is scored, pair the kit with a TH400 pump for 1964-1967, and if the direct drum is worn, replace it with a TH400 clutch drum while everything is apart. Our TH400 rebuild cost guide covers where the money goes on a job like this.
| Fits | TH400 1965-1967 |
| Part type | Master Rebuild Kit |
| Condition | New |
| 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 listing states it is for the 1965-1967 TH400 including the switch-pitch ST400. Those units are identified by the two-prong plug on the case in Buick, Olds and Cadillac cars of those years.
This kit is built for 1965-1967 units. For 1968 and later, use our 1968-up master rebuild kit, which also includes both bands. If you are unsure of your year, send us the VIN or ID plate code.
Yes. The kit includes steel separator plates along with Borg-Warner frictions, so you are not reusing worn or heat-checked steels.
The listing for this 1965-1967 kit names the front band. Inspect the rear band and replace it separately if it is worn or glazed.
Any current licensed DEXRON fluid is correct for the TH400. A dry rebuilt unit and empty converter need far more than a pan refill, so add fluid in stages and finish by the dipstick at operating temperature.
Check the pump, the direct drum and the output shaft thrust washers. A scored pump or worn drum should be replaced during the rebuild rather than after a comeback.
