200-4R Valve Body 1982-83, new other (see details) and ready to install. Fits the 200-4R. Ships fast from the USA.
If your 1982 or 1983 Buick Grand National, Monte Carlo, Cutlass or Caprice with the 200-4R overdrive automatic is shifting harsh or slipping, hanging up at the TV cable, or has come back from a rebuild with a burned 3-4 clutch or overdrive band, the valve body is one of the first wear points to check on these early units. This listing is a 200-4R valve body built for the 1982-83 production range and ready to install.
The 200-4R is GM's four-speed rear-wheel-drive overdrive automatic, used across 1981-1990 full and mid-size GM cars including the Grand National, Monte Carlo, Cutlass and Caprice. The valve body routes hydraulic line pressure through precision bores and spool valves to apply the clutch packs and the overdrive band in sequence, and on this cable-controlled transmission the throttle valve (TV) cable signal that sets shift feel and line pressure also runs through this assembly. A worn valve body on the 200-4R tends to show up as a throttle-pressure problem rather than a pure electrical fault, since this early unit has no solenoids to carry the blame.
Sonnax's own product documentation for the 200-4R and its 4L60/700R4 relatives ties burned 3-4 clutches and bands to throttle-boost oil leaking past a worn boost valve and sleeve in the pump, and ties weak reverse engagement to thermal-expansion wear at the pump body's reverse boost circuit - both common, well-documented failure points on this family, covered in our 200-4R valve body symptoms guide.
Check the TV cable adjustment before assuming the valve body is at fault. On GM's cable-controlled transmissions including the 200-4R, the cable pulls itself out of adjustment at wide-open throttle over time, and a misadjusted cable produces the same harsh-shift and burned-clutch symptoms as a worn valve body. Our harsh or delayed shifts diagnostic walkthrough covers the cable check step by step, and the common problems and fixes guide covers the rest of the diagnostic path before you replace parts.
This valve body is built for the 200-4R as produced in the 1982-83 range, with the OEM reference 8657010. The 200-4R ran across several internal updates between 1981 and 1990, so match your old unit's casting number and TV cable linkage against this listing, or send us your year, make, model and VIN before ordering. See the full 200-4R parts selection for the valve body covering the full 1982-1990 range if your application spans more than these two years.
Change the fluid and filter at the same time so debris from the old unit does not circulate through the new valve body, and torque the bolts in the factory sequence rather than a spiral pattern. Refill with Dexron ATF, and re-adjust the TV cable to the factory procedure immediately after installation - a cable even one click off reproduces the same harsh-shift complaint the new valve body is supposed to fix. If the band or 3-4 clutch has already burned from the old TV boost leak, pair this valve body with a 200-4R overhaul kit to cover the gasket and filter work, and a fresh 200-4R shift kit once the pressure problem is corrected if you want firmer, more consistent shifts.
| Fits | 200-4R 1982-83 |
| Part type | Valve Body |
| Condition | New Other (See Details) |
| Brand | OEM |
| Reference | 8657010 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is built for the 200-4R as produced in the 1982-83 range, carrying OEM reference 8657010, used in the Buick Grand National, Monte Carlo, Cutlass, Caprice and other GM full and mid-size cars. Match your old unit's casting number and TV cable linkage, or send us your year, make, model and VIN before ordering.
Sonnax's product documentation for this family ties it to throttle-boost oil leaking past a worn boost valve and sleeve in the pump, which cuts apply pressure to the 3-4 clutch and overdrive band until they slip and burn.
Yes. Re-adjust the throttle valve cable to the factory procedure right after installation. A cable that is even one click off reproduces the same harsh-shift and burned-clutch symptoms the new valve body is meant to fix.
Dexron ATF. Change the fluid and filter at the same time as the valve body so debris from the old unit does not circulate through the new one.
Check and correct the TV cable adjustment first, since it is the more common and cheaper fix. If harsh shifts, a burned clutch, or weak reverse persist after the cable is correctly adjusted, the valve body or pump boost circuit is the more likely cause.
