4L70E Clutch Module, new and ready to install. Fits the 4L70E. Ships fast from the USA.
Rebuilders who already have a gasket and seal set on the bench often just need plates. This new 4L70E clutch module is that: a carded set of friction packs and a stack of steels, with no gaskets or rubber in the box. It suits a GM truck or SUV with the 4L70E, such as a 2006-2013 Silverado, Sierra, Tahoe, Yukon or Trailblazer SS, that is slipping when hot, flaring into third, or has a burned 3-4 pack found on teardown. It ships from the USA with a 1-year warranty.
Every gear in this transmission comes from holding or driving parts of two planetary sets, and the clutches do that job. A friction plate has bonded lining and is splined to one member; the steel plate next to it is splined to another. When oil pressure pushes the piston, the stack clamps solid and the two members turn together. The 3-4 pack takes the most abuse because it is applied in both third and fourth, so it carries load through every highway mile. On the 4L65E and 4L70E, GM increased that pack to seven frictions, according to Sonnax, while older 700-R4 and 4L60E units used five or six. The GM high-energy pack Sonnax describes uses .067 in frictions with .095 in steels, so plate thickness matters as much as the count.
Worn plates are usually the result, not the cause. Measure line pressure and look at the EPC solenoid current first, then air-check the clutch circuits during teardown; a cut piston seal or a leaking checkball will glaze new plates within weeks. Our 3-4 clutch failure guide walks through the input housing checks, and the delayed engagement guide helps separate a forward clutch problem from a pump or pressure problem. If the pump is the weak link, see our 4L70E pump failure guide before ordering.
This listing is for the 4L70E and has no year range attached, so match the plates to your own transmission. Count the frictions you remove from each drum, compare the internal and external tooth patterns with the listing photo, and measure an old steel with a micrometer. A unit that was earlier converted to a different 3-4 stack, or a 4L60E case wearing 4L70E parts, may not match a stock count. Send us the year and VIN, or a photo of your old plates, and we will confirm. If you also need gaskets and seals, the 2004-2014 4L70E clutch module with seal kit covers both. Browse the rest of the lineup on the 4L70E collection page.
Worn valve body bores are a common reason a rebuilt 4L70E burns the 3-4 pack again; a 2006-2013 4L70E valve body or a new pressure control solenoid brings line pressure back where the new plates need it.
| Fits | 4L70E |
| Part type | Clutch Module |
| Condition | New |
| 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. The listing photo shows friction packs and steels only. Pair it with an overhaul kit or order the 2004-2014 module that includes the gasket and seal set.
Sonnax lists the stock 4L65E and 4L70E 3-4 pack as seven frictions. Older 4L60E and 700-R4 units used five or six, so count what you remove.
Low line pressure or a 3rd-gear oil leak is the usual cause, from worn valve body bores, a weak pressure control solenoid, a bad checkball or cut sealing rings. Fix that before installing new plates.
Only if they are flat, not blued and not scored. This module includes a steel stack, so most rebuilders replace them.
DEXRON-VI, which GM specifies for the 4L70E. Use it to soak the frictions before assembly.
