200-4R Overhaul Kit 1981-1990, new and ready to install. Fits the 200-4R. Ships fast from the USA.
If your 1981-1990 Buick Regal or Grand National, Monte Carlo, Cutlass Supreme, Caprice or other rear-drive GM car with the 200-4R is dripping red fluid from the pan rail and front seal, slips going into fourth, or sits for a beat before Drive engages on a cold morning, the rubber inside the transmission is usually the first thing that has given up. This is a new gasket and seal overhaul kit for that rebuild. Depending on stock it ships under the Transtec or Toledo name, both of which are full soft-part kits for the 1981-1990 200-4R.
It is a reseal kit only. There are no frictions, steels, bands or filter in the box, so plan on pairing it with friction material if the clutches are burnt.
The 200-4R makes four speeds with a compact gear train and an overdrive that comes from the 3-4 clutch and the 2-4 band working together. Every one of those apply devices is moved by line pressure, and that pressure has to cross several joints between parts that spin against each other and parts that stay still. Teflon and cast sealing rings bridge the rotating joints on the pump stator and input shaft. Lip seals and O-rings hold oil behind the forward, direct, overdrive and 3-4 clutch pistons and on the servo and accumulator pistons. Paper gaskets seal the pump, the spacer plate and the valve body.
On a unit that has seen forty-plus years of heat cycles, those parts shrink and go hard. Oil leaks past them before it reaches the piston, the pack never clamps fully, and the transmission slips and burns friction even when the clutches started out fine. This kit replaces all of that rubber and paper in one order: the metal-clad front pump seal and rear seal, sealing rings, lip seals, O-rings, servo seals, Teflon rings, valve body gaskets and the pan gasket (neoprene or the brown Duraprene version, depending on stock).
Start with the TV cable. A 200-4R with the cable out of adjustment runs low line pressure and will slip and burn the 3-4 clutch no matter how good the seals are, so check it at idle and at full throttle first. Then put a pressure gauge on the line tap and compare idle, Drive and Reverse readings. Low pressure everywhere points to the pump; pressure that falls off in one range points to that circuit's seals. Pull the pan too: clean fluid with light debris is a reseal job, while black fluid and a bed of friction material means you need a full rebuild. Our 200-4R common problems guide walks through those checks, and the 200-4R fluid leak guide shows where outside leaks usually start.
The kit is listed for 1981-1990 200-4R transmissions in Chevrolet, Buick, Oldsmobile, Pontiac and GMC applications. GM made running changes during that span, so lay each new seal and gasket next to the old part before installing it, and check your pump and valve body gasket patterns against the ones in the kit. If you are unsure which unit is in your car, send us the year and VIN and we will check it. Every part we carry for this transmission is on our 200-4R parts page.
| Fits | 200-4R 1981-1990 |
| Part type | Overhaul 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.
No. It is a gasket and seal kit only: pump and rear seals, sealing rings, lip seals, O-rings, servo seals, Teflon rings, valve body gaskets and the pan gasket. Frictions, steels, bands and the filter are bought separately.
The kit ships as either Transtec or Toledo depending on stock at the time of your order. Both are complete 1981-1990 200-4R gasket and seal sets.
The kit is listed for all 1981-1990 200-4R transmissions, which covers the Grand National. Compare each gasket to the old part during the rebuild, or send us your VIN if you want us to check first.
Only if the slip comes from leaking apply circuits and the 3-4 clutch and 2-4 band are still usable. Check the TV cable and line pressure first; if the 3-4 clutch is burnt, replace the frictions along with the seals.
The 200-4R uses Dexron ATF. Fill, set the TV cable, road test and check the level again with the fluid hot.
