6L45 Transmission parts, repair guidelines, problems, manuals
GA6L45R, 6L45R
Transmission general data
| Number of gears | Transmission Type | Drive | Torque (Nm) | ATF (full capacity) L | ATF (change) L | ATF type |
|---|---|---|---|---|---|---|
| 6 | AT | RWD | 450 | 9,8 | 6,2 | Mercon SP |
The Hydra-Matic range 6L45 - ... 6L90 is the second generation of modular-type 6-speed automatic transmissions, used for RWD vehicles. The 6L80 and 6L90 were the first automatic gearboxes of the Heavy-duty class designed in 2005. Next year 6L50 \6L45 gearboxes of the Medium-Duty class (with a lower torque) up to 450 Nm replaced BMW gearbox, which was popular in repair services. The 6L45E (GA6L45R) is a constructively modified 5L40 (which was actually replaced by the 6L45E in 2007 ). Mainly used with budgetary BMW-3 and X3 with engines 2.5l - 3.0L. 6L50, 6L80 and 6L90 transmissions may be considered as quite reliable RWD 6-speed gearboxes of GM series. European modifications 6L45 /R have been used since 2006 on BMW Х1, Х3 of 1-st 3-rd and 5-th series and manufactured in Strasbourg, France. These gearboxes mainly differ in electrical components.
What are you looking for?
Overhaul Kit | Friction Kit | Friction | Steel Plate | Steel Kit | Band | Solenoid Kit | Solenoid EPC | Solenoid TCC | Pump | Shaft | Drum | Valve body | Torque converter | Hub | Piston | Piston Kit | Planetary Gear | Filter | Gasket | Bushing | Seal | Bearing | Pressure Plate | Stator | Differential | Retainer | Inhibitor Switch | Instruction manual | TOOLS & ACCESORIES | Sensor
Which cars run with this gearbox?
| Brand | Model | Year | Type | Engine |
|---|---|---|---|---|
| BMW | 1-SERIES | 06-13 | 6 SP RWD | L4 1.6L 2.0L L6 3.0L |
| BMW | 5-SERIES | 06-10 | 6 SP R/4WD | L6 2.5L 3.0L |
| BMW | 6 SERIES | 07-13 | 6 SP RWD | L6 3.0L |
| BMW | X1 | 09-16 | 6 SP R/4WD | L4 2.0L L6 3.0L |
| BMW | Z4 | 09-16 | 6 SP RWD | L6 3.0L |
| BMW | Z4 ROADSTER | 09-11 | 6 SP R/4WD | L6 3.0L |
| Cadillac | ATS | 12-16 | 6 SP R/4WD | L4 2.0L 2.5L V6 3.0L 3.6L |
| Cadillac | CT5 | 10-14 | 6 SP R/4WD | V6 3.6L |
| Cadillac | CTS | 13-16 | 6 SP R/4WD | L4 2.0L |
| Cadillac | CTS SPORT WAGON | 09-14 | 6 SP R/4WD | V6 3.0L 3.6L |
| Cadillac | STS | 06-13 | 6 SP R/4WD | L4 2.0L V6 3.0L 3.6L V8 4.6L |
| Holden | COMMODORE | 12-13 | 6 SP RWD | V6 3.0L 3.6L |
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- Adapter, Adapters, Grommet Valvebody
- Oils, NS2, NS-2, ATF, Oil
- Bands, Brake band, Lining
- Billets
- Cover Bolt, Cover Bolts, Mounting Bolt, Mounting Bolts, Pan Bolt, Pan Bolts, stud, studs, Split Pin
- Booster, Boosters, Boost Regulator, Boost Spring, Boost Valve, Lockup Boost, Booster kit, Kit Boost, Kit Boost Valve
- Bushings, Bush,
- Case Covers, Cover, Dust Cover,
- Dampers, Damper Assembly, Damper
- Drums, Contender Drum, Drum with Bearing, Reverse Drum, Drum Part
- TCMs, transmission control module, TCU, TCM, Computer, Circuit Board, Control Module, Control Unit, Hardware
- Filters, Filter Cartridges, Filter Cartridge, Oil Pan Filter, Inlet, Filter Kit
- Flanges, Drum Flanges, Drum Flange, Flange Yokes, Flange Yoke, Flange Kit, Rear Flange Kit, Yoke, Slip Yoke, Yokes, Flange
- Friction Discs, Frictions, fric, Friction Disc, Friction, Friction Plate, Friction Ring, fric., Clutch Plate, Friction Lining
- Friction kits, friction pack, friction set, High Energy Clutch Friction Module, Friction clutch
- Gaskets, gsk, gskt, , Cover Gasket, Cover Gaskets, Case Gasket, Case Gaskets, Filter Gasket,Filter Gaskets
- Gasket Pan, Pan Gaskets, Pan gasket, Filter Gasket,Filter Gaskets
- Hubs, Hub Insert
- Inhibitor switches, Inhib.Swtch, Range Selector Switch, Selector, Range Switch, Position Switch, Gear Selector, ISM
- manuals, Technical manual, Repair manual, service manual, Manual, VIDEO & AUDIO, tapes
- Lubes, Tranny's Green Assemblee,
- o-ring, o ring, 0ring, 0-ring, 0 ring, ORing, Ring, O-Rings, o-ring, O'Ring
- ohk, OHK kit, Overhauls, mok, Overhaul kit, Masterkit, Master kit, Master Overhaul, Repair package, Overhaul, Rebuild kit, Master Rebuild, Super Rebuild Bundle, Banner Kit, SUPER KIT, SUPERIOR KIT
- Pans, Crankcase, Oil Pan
- Performance Converters
- Pinions, Pinion Gear, Pinion Pin, Pinion Gear Shaft,
- Pistons, Apply Piston, Pack Piston, High Piston, Damper Piston, Piston Damper, Piston Plate, Interm. Servo Pist, Piston Seals, Piston Seal Ring, Piston Seal Rings, Piston Seal, Piston Cover, Piston Covers, Rear Servo, servo piston, Piston Retainer, Piston Retainers, Servo kit, Super Servo, servo, Shift Pison
- Piston Kits, Piston Complete, Piston part, Piston Sets, Piston Set
- Planetary Gears, Planetary Gear Set, Planetary Gear Sets, Planet, Planetary Assembly, Planetary Component, Reaction Carrier, Planet
- Plugs, Plug Adapter, Intermediate Plugs, Intermediate Plug, Bore Plug, Bore Plugs, Valve Bore Plugs, Valve Bore Plug
- Pressure Plates, Apply Plate, Backing Plate, Backing Plates, Backplate, Ret Plate, Dish Plate, Press Plate
- Pressure Switches
- Pumps, Rotor, Vane, Vanes, Kit Pump Vane/Ring
- Regulators, Main Pressure Regulator, Main Pressure Reg, Pressure Regulator, Forward Regulator, Secondary Regulator, Pressure Reg, Press Reg
- Regulator Valves
- Seals, Metal clad seal, Lip Seals, Connector Hole Seal, Lip Seal, Main Seal, Radial Lip Seal, Main Seal, Manual Seal, Oil Feed Seal, Side Cover Seal, Seal Cooler, Seal Oil Cooler, Case Seal
- Cap,
- Sump modification kit
- Shafts
- Shims, Endplay Shims, End-play Shims, End-play Shim, Endplay Shim
- solenoid, Shift Solenoid, Kickdown Solenoid, Control Solenoid Support, Solenoid Retainer, Interlock Solenoid, Solenoid Switch
- Solenoid package, solenoids, Solenoid Retainer, Solenoid Kit, pack, Solenoid Upgrade Kit, Solenoid Set, Shift Solenoid Upgrade Kit, Shift Solenoid Kit Set
- spragg, Sprags, Mechanical Diode, Sprag Assembly, Sprag Cartridge, One Way Clutches, One Way Clutch, Roller Clutches, Roller Clutch, Low/Rev Diode, Retaining Plates, Retaining Plate, Accordion Spring, OWC
- Springs, Wave Spring, Spring Adjuster, Spring Disc, Torsion Spring, Return Spring, Piston Spring, Damper Spring, Damper Springs, Control Spring, Detent Spring, Drum Spring, Limit Spring, Return Sprng, Diaphragm Springs, Diaphragm Spring
- Stators
- Steel Kits, Steel Set Kit, Steel Clutch Plate Kit, Steel kit, clutch steel, clutch steels, Steel set, steel pack, module kit, Steel Plate Clutch Kit, Steel Plate Kit, Steel Plate Module, Steel Plate Set, Steel Module
- Steel Plates, steel, Steels, steel disk
- Supports, Centre Supp Rebuilt, central support. support central
- Manifolds, Switch Manifold, Switch Manifolds, Pressure Switch Manifold, Pressure Switch Manifolds, Switch, Manifold
- Washer, Washers, T/Washers, Thrust Washers, Selective Washers, Kit Washer, Drive Sprockets, Driven Sprockets, Drive Sprocket, Thrust Kit, Washer kit,
- Tool kits, Alignments, Alignment, Reamers, Reamer, Tool kit, Tool, Pressure Gauge, Clutch Aligning Tool, Clutch Removal Tool, Clutch Tool Supplement, Kit Installer, Air Test Plate, ADJUSTMENT TOOL, Thread Tap, Remover
- converter, t.converter,
- Turbines
- Throttle Valve, Timing Valve, Operating, Relief Valve, Safety Valve, Control Valve, AFL Valve, Limit Valve, Actuator Feed Limit Valve, AFL Valve
- VB plate, Valve body plates, Valve body plate, ValveBody, V/Body, valve-body, v body, v-body, v/b, Orifice, Hydraulic control unit, HCU
- Overlap Control Valve Kit, Pressure Regulator Valve, Switch Valve Plug, Actuator Feed Limit
- Oversized Valve, flow control, Oversized Safety, Oversized, Flow Control, Valve pump flow control, Pump flow control valve, Oversized Pump Flow Control
- Sonnax Zip Kit
These gearboxes usually get in repair services for scheduled ATF change, replacement of the filters with the pan gasket. ATF gets contaminated because of aggressive accelerations and wear-out of the lock-up clutch. It is recommended to change ATF in accordance with its contamination level, but no later than after travelling 80 thousand kilometers.
Typical problems
The problem detected on the 6L80 (manufactured before 2008) is related to the design of the pump cover and cranking of filler rings resulting in problems with shifting from the 2-nd to the 3-rd gear and delays in switch-on of Forward or Reverse gears.
In case of the overhaul, it is recommended to check the leak integrity of the drum 555. There may be some hidden cracks leading to the operation pressure losses in packs causing problems when shifting gears 2-3 and Reverse. Overheating is dangerous for all pistons, which have to be fully replaced. It is the problem inherited from its 5-speed predecessor 5L40E.
All pistons and retainers are replaced quite frequently (kit of pistons 6L45-50). Problems with the torque converter (TC) may also occur in these gearboxes. The wheel-hub early gets out of order. Rare and complicated cases of the overhaul show some vulnerability of the pack (4-5-6 Clutch), which in neglected cases leads to burning of all frictions, including steel discs and pistons. The reason is often related to wear-out of the TC bushing and TC itself.
The torque converter is often considered to be a soft spot in American gearboxes. After 100-150 thousand kilometers (depending on engine and driving style), it is recommended to test the TC seal for leaks. When there are leakages in the seal or ATF gets rapidly contaminated, then it is desirable to get TC in repair services to prevent problems with the pump or the valve body. This measure particularly should be applied when automatic gearboxes operate jointly with motors (with maximum torques).
Instruction manuals and useful links Suggest your link
| Link type | Source | Description |
|---|---|---|
| www.at-manuals.com | Scheme 6L45 | |
| drive.google.com | Repair manual 6L80E ATSG | |
| Sonnax | Valve Body Layout GM 6L45, 6L50, 6L80, 6L90 | |
| Sonnax | Vacuum test 6L45, 6L50, 6L80, 6L90 | |
| www | Sonnax | 6L80 Family Identification Guide |
| www | Sonnax | Location and Function of New #8 Checkball for 6L80/90 |
| www | Sonnax | 6L80/6L90 "No Movement" After Repair |
| Video | Sonnax | 6L80 Series Transmission Upgrades & Repairs |