6T45 Master Rebuild Kit 2008-11, new other (see details) and ready to install. Fits the 6T45. Ships fast from the USA.
A 2008-2011 GM front-driver with the 6T45 that has lost reverse, slips into third or fifth with a P0776, or has burnt fluid and clutch debris in the pan needs more than a reseal. This master rebuild kit is the full-overhaul version: alongside the seals, gaskets and filter it includes friction and steel clutch plates and replacement pistons, so the clutch packs and apply pistons are renewed in the same job instead of being reused. It is listed for 6T40, 6T45 and 6T50 units from 2008-2011.
The 6T45 is the heavier-duty version of the 6T40 family, found behind the 2.4L in the 2011 Equinox and Terrain among others. Five clutches share the work: the 1-2-3-4, 3-5-Reverse and 4-5-6 rotating clutches and the 2-6 and low and reverse holding clutches, plus a low one-way clutch. Each is applied by a bonded piston fed through the case and drum sealing rings, with shifts timed by the TEHCM inside the case. Over time the pistons harden and leak, the frictions glaze, and the TCM answers slip with longer, harsher shifts until it sets a ratio code. Renewing frictions, steels, pistons, seals and the filter at once puts every circuit back to full apply pressure.
Check fluid level at the level set plug at 85-95 C with the engine running, pull codes, and look at the pan contents. A unit with P0776 and no reverse almost always has internal clutch damage; a unit with harsh shifts and clean fluid may only need adaptive values cleared or a calibration. Our 6T40/6T45 common problems guide separates the two, and the 6T40 rebuild cost guide explains what drives the bill once the case is open.
This kit is listed for 2008-2011 6T40, 6T45 and 6T50 transmissions. The 6T40 family went through generation changes, with GM moving to Gen 2 controls and a revised 4-5-6 clutch in 2012, and the kit carries its own generation fitment note, so confirm your unit generation before ordering. The easiest way is to send us your year and VIN, or read the eighth digit of the TEHCM identifier. For later units see the 2012 6T45 master rebuild kit. The non-piston version for the same years is the 2008-2011 6T40 master rebuild kit.
Worth adding while it is apart: a 6T45 Gen 1 shift kit to restore the worn valve body bores, and a pump seal installer set to seat the new seals square.
| Fits | 6T45 2008-11 |
| Part type | Master Rebuild Kit |
| Condition | New Other (See Details) |
| 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.
Yes. It includes friction and steel clutch plates, pistons, the filter, and the overhaul seals and gaskets.
It is listed for 2008-2011 6T40, 6T45 and 6T50 units, but the kit carries a generation fitment note. Send us your year and VIN and we will confirm it matches your transmission before it ships.
GM recommends replacing the 3-5-R piston and waved plate whenever the unit is apart. Inspect the 3-5-R drum splines, bushings and pump, and consider a shift kit to repair worn valve body bores.
Dexron VI. Check the level at the level set plug with the fluid at 85-95 C and the engine running.
Yes. Clear adaptive values and run the Service Fast Learn with a capable scan tool, then drive it through normal shift cycles so the TCM can finish adapting.
