700R4 Clutch Drum 1987, remanufactured and ready to install. Fits the 700R4. Ships fast from the USA.
If your 1987-1992 Chevy or GMC truck, Suburban, Blazer, Camaro or Corvette with a 700R4 has lost Reverse, slams into Reverse, or came apart with a cracked or worn reverse input drum, this is the late-style drum you need. It is a reconditioned GM reverse input clutch drum from the late 1987-up design, inspected, lathe prepped and cleaned, and shipped assembled with its hardware so the parts stay together in transit.
It does not include friction plates, steel plates or the piston lip seals, and the bushings are the used originals. Plan on a seal kit, a reverse clutch pack and new drum bushings from your rebuild kit.
When you pull the shifter into Reverse, oil feeds into this drum and the piston clamps the reverse input clutch, locking the drum to the input so it can drive the sun shell and reaction sun gear backward. The outside of the same drum is the surface the 2-4 band grips in 2nd and 4th. A drum with a worn band surface, a leaking piston or a damaged feed hole can cost you Reverse and also let the band slip on the 1-2 shift and in overdrive.
In 1987 GM added the auxiliary valve body to the 700R4 and changed this drum at the same time. The early 1982-1986 drum has a large rectangular feed hole; the late drum uses a small round hole, about .095 in., that acts as the orifice controlling how fast the reverse clutch applies. Put an early square-hole drum in a 1987-1992 unit and Reverse engages hard. In 1993 GM moved the orifice into the valve body with a reverse feed check ball and went back to the rectangular-hole drum, so a round-hole drum in a 1993-up unit can cause a delayed Reverse.
Check fluid level and condition, then check line pressure in Reverse. A misadjusted TV cable drops line pressure and burns clutches and bands no matter how good the drum is, so read 700R4 TV cable adjustment and line pressure first. If Reverse and the forward gears are both affected, also suspect the sun shell, which our 700R4 common problems and fixes guide covers. Once the unit is apart, look at the feed hole in your old drum: round means late style, rectangular means early or 1993-up.
Listed for late 1987-up 700R4 units, the transmissions with the auxiliary valve body. That makes it the right match for late 1987 through 1992 cable-controlled 700R4/4L60 transmissions. The drum is described as a 700R4/4L60E design, but because of the 1993 change above, check the feed hole against your old drum before using it in a 1993-up unit. If you are unsure which drum your transmission had, send us your year and VIN, or browse the 700R4 transmission parts page.
| Fits | 700R4 1987 |
| Part type | Clutch Drum |
| Condition | Remanufactured |
| 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.
No. It includes the drum, piston, return spring with snap ring, belleville plate, pressure plate and snap ring. Frictions, steels and lip seals come from your rebuild kit.
It is the late-style drum with the small round feed hole. Early 1982-1986 units used a rectangular-hole drum, and mixing styles changes how Reverse engages, so match the drum style to the one you removed.
Check first. In 1993 GM added a reverse feed check ball in the valve body and returned to the rectangular-hole drum. A round-hole drum in that unit can give a delayed Reverse.
Yes. The bushings are used originals. New bushings keep the drum centered and protect the sealing rings on the stator shaft.
Dexron-type ATF. A current Dexron-VI fill is a common service choice because it is backward compatible with the older Dexron specs.
