6L45 Planetary 2007-2013, used and ready to install. Fits the 6L45. Ships fast from the USA.
If your BMW 128i or 328i with the six-speed automatic has started whining under load, grinds or clunks on takeoff, or came out of the pan with glitter on the magnet, the rear planetary in the 6L45 is one of the hard parts worth pricing before you commit to a full replacement transmission. This listing is a used, original-equipment 6L45 rear planetary removed from a rear-wheel-drive BMW with the GA6L45R, BMW's name for GM's 6L45, and listed for the 2007-2013 E82 1 Series and E90 3 Series. It is the compound gearset at the back of the unit, not the input planet with sun gear at the front.
The 6L45 uses a Lepelletier layout: a simple planetary set at the front and a Ravigneaux compound set at the rear. The front set has its sun gear anchored to the stator support, so its carrier always turns slower than the engine and feeds that reduced speed to the clutches. The rear set is the part on this page. It has two sun gears, one carrier with both short and long pinions, and a single ring gear that drives the output. Different clutches drive or hold different members of this set to produce all six forward gears and reverse.
The clutch chart shows how hard this assembly works. In first gear in Drive only the 1-2-3-4 clutch is applied and the low sprag holds; in first-gear braking and in Reverse the low and reverse clutch is applied as well, holding the rear carrier against the full multiplied torque of launch and backing up. In fourth through sixth the 4-5-6 clutch drives the carrier instead. Because one compound set handles every ratio, worn pinion needles or thrust washers here show up in several gears rather than just one.
Most 6L45 complaints are hydraulic or electronic, not hard parts. Valve body and solenoid faults, low fluid and pressure problems cause flares, harsh shifts and limp mode, and our 6L45 limp mode guide covers how to work through codes, line pressure and the valve body first. A gearset problem usually announces itself with noise and debris instead of codes. Check the fluid level hot, pull the pan and look at the magnet: clutch material points one way, steel and bronze point toward the planetary. A no-move complaint is different; on some all-wheel-drive GM applications the output shaft spline to the transfer case has fretted, so rule out the driveline before blaming the gearset.
The donor was a rear-wheel-drive BMW with the GA6L45R, listed for 2007-2013 128i and 328i (E82 and E90) models; the donor listing carried BMW number 24 00 7 568 546. GM also built the 6L45 and the heavier 6L50 for Cadillac and Chevrolet cars, and internal parts were not always shared across applications and model years. Match this assembly to yours before ordering: compare the pinion count, the sun gear tooth counts, the ring gear and the overall height against the one you removed, or send us your year, model and VIN. Our full range of 6L45 parts is on the 6L45 parts page.
If the front set is the worn one instead, the 6L45 input planet with sun gear is listed separately.
| Fits | 6L45 2007-2013 |
| Part type | Planetary |
| Condition | Used |
| 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.
It is the rear compound (Ravigneaux) set with the short and long pinions. The front simple planet with its sun gear is a separate part.
It was removed from a rear-wheel-drive BMW with the GA6L45R and is listed for 2007-2013 128i and 328i models (E82 and E90). GA6L45R is BMW's designation for the GM 6L45.
Do not assume so. GM used different internal parts across the 6L45 and 6L50 and across years. Compare tooth counts, pinion count and height with your old set, or send us your VIN.
A whine that tracks road speed and changes from gear to gear, often loudest in first and reverse, usually with bronze or steel debris in the pan.
Use the fluid your vehicle specifies (Dexron VI for GM applications; the label or BMW service data for BMW cars), set the level hot, and run the adaptive relearn with a scan tool.
