4L65E Clutch Module 1987, new and ready to install. Fits the 4L65E. Ships fast from the USA.
If your 4L65E Silverado, Sierra, Tahoe or Yukon slips into 3rd or flares going into overdrive with a trailer behind it, the 3-4 clutch has almost certainly burned, and a stock set of frictions is the part that let go. This is a Raybestos RCPS-51 Stage-1 performance friction module, listed as 1987-up because it is built to the clutch dimensions that run from the late 700-R4 through the 4L60E and 4L65E. It is a frictions-only performance set with a 3-4 ZPak, aimed at the builder who wants more holding capacity than the original pack had.
A 4L65E holds each gear by squeezing friction plates against steel plates in five clutch packs plus the 2-4 band. This module replaces the friction side of four of them: 5 forward frictions, 2 overrun frictions, 4 reverse input frictions and 5 low/reverse frictions, all in Raybestos Stage-1 red material. The 3-4 pack gets the RZP-001 ZPak instead of conventional plates. Raybestos describes ZPak as a patented single-sided plate system that adds torque and heat capacity without the plates coning, and lists RZP-001 for the TH700-R4, 4L60E, 4L65E and 4L70E. That matters in this transmission because the 3-4 clutch is the weak link: it applies in both 3rd and 4th and carries the full load of a 5.3L or 6.0L V8 in overdrive.
Frictions rarely fail on their own. Sonnax traces most 4L60E-family 3-4 slipping back to low line pressure or 3rd-gear oil leaks, so a pressure test and a look at the pump, input housing sealing rings and 3rd accumulator checkball belong in the diagnosis. Our 4L65E 3-4 clutch failure guide walks through those checks and the input housing turbine shaft issue GM documented. If the trouble is a harsh or late shift rather than a slip, read the 4L65E common problems guide first, because worn valve body bores can mimic clutch failure.
Be clear on the dates. The 4L65E itself went into 2001-2007 GM trucks and SUVs; in 1987 this transmission family was still the 700-R4. The 1987-up label comes from the clutch plate sizes, which carried through the family, and Raybestos lists the 3-4 ZPak as 1988-on for the TH700-R4 forward. Steel plates are not included: the listing calls for pairing this set with steel module 000757 or STMGM10K. Count the frictions in your old packs and compare tooth style before ordering, or send us your year and VIN and we will confirm. Every other 4L65E hard part we carry is in the 4L65E parts collection, and if you want frictions and steels in one box, see our 4L65E friction and steel combo module.
A 4L65E master rebuild kit covers the seals and gaskets, and a 4L65E input drum is the right call if the 3-4 piston bore or turbine shaft fit is worn.
| Fits | 4L65E 1987 |
| Part type | Clutch Module |
| 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. The 4L65E arrived in 2001 GM trucks. The 1987-up label reflects clutch plate dimensions shared with the 700-R4 and 4L60E, so this set fits 4L65E rebuilds as well as the earlier units.
No. This is a frictions-only Stage-1 module with a 3-4 ZPak. The listing calls for steel module 000757 or STMGM10K, or reuse steels only if they are flat, unblued and within spec.
ZPak is Raybestos' patented single-sided clutch plate system. In the 3-4 position it adds torque and heat capacity without plate coning, which is exactly where the 4L65E fails under towing loads.
Only if the cause was simply wear. Low line pressure, leaking input housing seals and a leaking 3rd accumulator checkball also burn the 3-4 clutch, so fix those during the same rebuild.
Dexron VI. Soak the new frictions in it for at least 30 minutes and check the fluid level hot once the rebuild is complete.
