200-4R Pump 1982-96, new and ready to install. Fits the 200-4R. Ships fast from the USA.
Do you have a Grand National, Monte Carlo SS, Cutlass, Regal or Caprice with a 200-4R that groans in Park, engages slowly when hot, or that just dropped pieces of a broken pump ring into the pan? Then the pump's rotating parts are worn out, even if the body and cover can still be used. This kit lets you rebuild your own pump instead of buying a complete one. It contains a new 10-vane rotor, an outer slide, ten vanes, a 10-vane plastic guide and two hardened vane rings. The catalog lists it for the 1982-1996 GM 200-4R, 700R4 and 4L60 family.
The 200-4R pump is a variable-displacement vane pump. The converter hub turns the rotor. The two rings inside the rotor push the vanes out against the slide. A priming spring holds the slide in its maximum output position until regulated pressure pushes it back. That is how the pump gives full volume at idle and less at cruise. The 200-4R pump body does more than the pump does. It also holds the pressure regulator, the TV and reverse boost valves and, on these non-PWM units, the converter clutch apply valve. The quality of every shift and the lockup function depend on how much oil the rotor and slide deliver. TransGo notes that the original rings in this pump family are brittle. When a ring breaks, it often damages the converter and the rest of the transmission along with the pump.
Set the TV cable first. A cable adjusted too loose gives low pressure on the 200-4R and can look like a pump problem. Then use a gauge to check line pressure at idle in Drive and Reverse and again at a raised RPM. Our 200-4R pump failure guide covers the full test, and 200-4R delayed engagement lists the other causes. Once the pump is apart, check the pocket and the face of the cover. A rotor kit will not fix scoring in the body, a worn slide pivot pin or a worn valve bore.
The catalog lists this kit for 1982-1996 200-4R, 700R4, 4L60 and 4L60E pumps. On a 200-4R it replaces a worn 10-vane setup and upgrades an early 7-vane pump. The 200-4R was built in more than one pump version. Before you order, count the vanes in your old rotor, then measure the thickness of your rotor and slide and compare them with the new parts. A rotor that is not the right size for the pocket will bind or leak. If you are not sure, send us your year, vehicle and the numbers stamped on the pump. All our 200-4R parts are on the 200-4R parts page. If you are comparing units for a swap, see 200-4R vs 700R4.
Clean the pump body and set the slide in place. Then install the priming springs. TransGo recommends both springs for 10-vane pumps. Put the rings in the rotor and install the vanes. If the rotor does not turn freely with new vanes, dress the inside edge of each vane on emery cloth to make a small break-in flat and set that flat against the rings. Coat everything with Dexron fluid and assemble the cover. Install a new front seal and bushing if needed, then align the pump halves with an alignment band before you torque the bolts. The GM front pump alignment band is made for this job. If you are doing a complete rebuild, the 200-4R overhaul kit includes the gaskets, seals and pump sealing rings.
| Fits | 200-4R 1982-96 |
| Part type | Pump |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
It is listed for 200-4R, 700R4 and 4L60 pumps from 1982 to 1996. Count the vanes in your old rotor and measure the rotor and slide thickness before installing. The new parts must match the pocket in your pump body.
Yes. The kit includes its own slide, so it is sold as an upgrade from the early 7-vane rotor. Check that the new slide and rotor match your pocket depth. TransGo says to use both priming springs with a 10-vane rotor.
No. It is only the rotating parts: rotor, slide, vanes, guide and two hardened rings. You reuse your pump body and cover. If those are scored or the valve bores are worn, you need a complete pump instead.
The original rings in this pump family are brittle and can crack, especially at high engine RPM. The hardened rings in this kit replace them. Flush the cooler and check the converter after a ring failure, because the pieces travel.
The 200-4R was filled at the factory with Dexron. Current GM service fill is Dexron VI, which is backward compatible. Pre-lube the pump with it during assembly.
