700R4 Sprag Clutch 1986, remanufactured and ready to install. Fits the 700R4. Ships fast from the USA.
When a 700R4 or 4L60E pulls in reverse but will not move in Drive, or takes off in second instead of first, one of its two one-way clutches is the usual suspect. This listing is a sprag set for 1986-and-later units: a 29-element forward sprag and the wide-design low roller clutch. It covers the 700R4 in 1986-1992 Chevrolet and GMC C/K pickups, Blazers, Suburbans, Camaros, Corvettes and Caprices, and carries forward into the 4L60, 4L60E and 4L65E that followed. Replacing both one-way clutches together is standard practice on any rebuild where one has failed.
The forward sprag sits in the input housing assembly between the forward clutch and the input sun gear. With the forward clutch applied it locks and drives the input sun gear in first, second and third, then freewheels so the overrun clutch can take over when engine braking is called for. The low roller clutch is the other one-way device: it holds the reaction carrier side of the gear train against the case in first gear in Drive, then overruns as soon as the 2-4 band applies for second. Both rely on the races they ride on being smooth and correctly sized.
The early forward sprag used 28 elements. The 29-element design in this set is the later configuration and is used as an upgrade for earlier 700R4s, and the wide low roller clutch is the design GM used from 1986 on.
The selector positions do most of the diagnosis. If Drive has no first gear but manual 1 pulls hard, the low-reverse clutch is holding for the low roller and the roller clutch is the fault. If there is no drive in any forward range but reverse is fine, look at the forward clutch and forward sprag. Check fluid level first, since low fluid mimics both. Our 700R4 delayed engagement guide covers slow or missing engagement into gear, and 700R4 common problems and fixes explains the related sun shell and 3-4 clutch failures you should inspect while the unit is apart.
This set is listed for 1986-on 700R4, 4L60, 4L60E and 4L65E transmissions. The listing notes that the wide low roller can go into a 1982-1985 unit only when the matching inner and outer races are used, because the early roller and races are narrower. The sprag is a one-way part and has a correct installed direction: match it to your old one before disassembly and confirm the input sun gear turns freely one way and locks the other. If your unit is a swap of unknown year, send us the year and VIN or the ID tag. More parts for this unit are on the 700R4 parts page.
| Fits | 700R4 1986 |
| Part type | Sprag Clutch |
| 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.
The listing describes a forward sprag with 29 elements and a wide-design low roller clutch for 1986-on 700R4 and 4L60-series units. Races are not part of the set, so reuse your good races or buy them separately.
The 29-element sprag is used as an upgrade in earlier units, but the wide low roller only fits a 1982-1985 transmission when it is paired with the matching later inner and outer races. Check your parts before ordering.
No first gear in Drive while manual 1 works points to the low roller clutch. No forward movement in any range with good reverse points to the forward clutch or forward sprag.
Yes, and it will cause no drive or a bind. Note the direction of the old sprag before removal and test that the assembly locks in one direction and freewheels in the other.
The set is listed for 1986-on 700R4, 4L60, 4L60E and 4L65E transmissions, so it fits the 4L60E as well as the cable-controlled 700R4.
