6T45 Overhaul Kit 2011-2018, new and ready to install. Fits the 6T45. Ships fast from the USA.
If you are pulling a 6T45 out of a 2.4L Equinox, Terrain, Captiva, LaCrosse or Regal because it slips in reverse, flares between gears when hot, or leaks from the bell housing, this is the gasket and seal set that goes back in with the hard parts. It is a new overhaul kit for the GM 6T45, listed for 2011-2018 and labeled for the 6T40 as well, since the two share a case. Expect gaskets and rubber and metal seals for a reseal. Frictions, steel plates, bonded pistons and the 3-5-R wave plate are separate purchases.
The 6T45 is the higher-capacity member of the 6T40 family, a six-speed transverse automatic fitted mostly behind four-cylinder engines in GM crossovers and midsize cars. Its control module and solenoid body are bolted to the valve body, and every clutch it applies is fed oil through a chain of passages that only hold pressure as long as the gaskets and seals between them do. When a rotating seal ring or a piston seal hardens, apply pressure leaks off. The control module sees the clutch take longer to fill, adapts as far as it can, and once it runs out of range you feel slip, flare or a late engagement and see a slip or ratio code.
Set the fluid level first. ATRA's bulletin for this family has you cycle through the ranges, idle, and drip-check at the level plug with the fluid at 85-95 degrees C; overfilled or underfilled units produce their own leak and slip complaints. Next, rule out software. GM PI0724B shows a harsh 2-3 shift on the 2011 Equinox, Terrain and Captiva 2.4L 6T45 that was corrected with a calibration, not parts. A delay into gear can come from a solenoid, a filter or internal leakage; our 6T40/6T45 delayed engagement guide walks through the order to check them. Where reverse, third and fifth all slip together, Sonnax documents the 3-5-R wave plate cracking at its tooth corners, which means the drum comes apart and a seal kit is needed anyway.
This kit is listed for 2011-2018 6T45 and 6T40 transmissions. The application notes with it also mention the Opel Antara and the Buick GL8 2.4L built for other markets, which tells you it is cut for the early case design. GM's PI0604C explains why that matters: the Gen 2 changeover during 2012 deleted one 3-5-R and 4-5-6 seal ring from the case and moved and revised the 4-5-6 piston outer seal, and a few 2012 cars stayed Gen 1. A 2011 Equinox or Terrain is the cleanest match. For 2012 and later, compare the seal rings on your case, or send us the year and VIN. A later Gen 3 unit is usually better served by the 6T45/6T40 Gen 3 overhaul kit for 2014-up. If the clutches are worn as well on a Gen 2 car, compare the 6T40/6T45 Gen 2 rebuild kit with frictions.
| Fits | 6T45 2011-2018 |
| Part type | Overhaul Kit |
| 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.
Mostly GM crossovers and midsize cars with the 2.4L and similar engines, such as the 2011 Equinox, Terrain and Captiva, plus LaCrosse and Regal. Check the RPO code on the glovebox label or send us your VIN to confirm 6T40 vs 6T45.
No. It is a gasket and seal overhaul set. Frictions, steels, bonded pistons and the 3-5-R wave plate are bought separately or as part of a master rebuild kit.
It is listed through 2018, but it is cut for the early case. GM changed the case seal rings and the 4-5-6 piston outer seal with the Gen 2 update in 2012, so compare your old seals or send the VIN before ordering.
Not necessarily. GM PI0724B covers that condition on 2011 Equinox, Terrain and Captiva 2.4L units and fixes it with a TCM calibration. Check that first.
DEXRON VI. Fill, cycle the ranges, then set the final level at the check plug with the fluid at 85-95 degrees C as ATRA describes.
