3T40 Transmission parts, repair guidelines, problems, manuals
TH125, TH125C
Transmission general data
| Number of gears | Transmission Type | Drive | Torque (Nm) | ATF (full capacity) L | ATF (change) L | ATF type |
|---|---|---|---|---|---|---|
| 3 | AT | FWD | 250 | 8,5 | 3,8 | Dexron III |
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 |
|---|---|---|---|---|
| Buick | CENTURY/CENTURY WAGON | 95-96 | 3 SP FWD | L4 2.2L |
| Buick | SKYLARK | 95 | 3 SP FWD | L4 2.3L |
| Chevrolet/GM | BERETTA/CORSICA | 95-96 | 3 SP FWD | L4 2.2L |
| Chevrolet/GM | CAVALIER | 95-01 | 3 SP FWD | L4 2.2L |
| Chevrolet/GM | LUMINA | 95 | 3 SP FWD | V6 3.1L |
| Oldsmobile | ACHIEVA | 95 | 3 SP FWD | L4 2.3L |
| Oldsmobile | CUTLASS CIERA/CRUISER | 95-96 | 3 SP FWD | L4 2.2L |
| Oldsmobile | SILHOUETTE | 95 | 3 SP FWD | V6 3.1L |
| Pontiac | GRAND AM | 95 | 3 SP FWD | L4 2.3L |
| Pontiac | SUNFIRE | 95-02 | 3 SP FWD | L4 2.2L |
| Pontiac | TRANS SPORT | 95 | 3 SP FWD | V6 3.1L |
-
-
- Oils, NS2, NS-2, ATF, Oil
- Bands, Brake band, Lining
- Bearings, brg, Mainbearing
- Cover Bolt, Cover Bolts, Mounting Bolt, Mounting Bolts, Pan Bolt, Pan Bolts, stud, studs, Split Pin
- Bushings, Bush,
- Input Carriers, Input Carrier, Carrier Assy, CARRIER-CR, CARRIER-MD,
- Casing, casings, cases
- Case Covers, Cover, Dust Cover,
- Chains,
- Differentials, Differential Carrier, Differential Carriers, Diff, Diff., Diff Housing Carrier
- Flexplates, Flex plate, Driveplate, Drive plate, D/Plate, Flexplate
- Drums, Contender Drum, Drum with Bearing, Reverse Drum, Drum Part
- Electrics, Electric, Electronic, Electronic Shift, Electronics, Pin Wiring, Relay Control Switch, Neutral Relay, Main Relay
- Filters, Filter Cartridges, Filter Cartridge, Oil Pan Filter, Inlet, Filter Kit
- 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
- manuals, Technical manual, Repair manual, service manual, Manual, VIDEO & AUDIO, tapes
- 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
- Piston Pins, Servo Pin, Piston Pin, Band Pin, Retaining Pin, Retaining Pins
- 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
- Pressure Plates, Apply Plate, Backing Plate, Backing Plates, Backplate, Ret Plate, Dish Plate, Press Plate
- Pumps, Rotor, Vane, Vanes, Kit Pump Vane/Ring
- 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
- Seal Rings, Seal Ring, Sealing Rings, Piston Seal, S/Ring, SEALING RINGS S/Ring, Accumalator Seals
- Shafts
- Reprogramming Kit, Kit Reprogram, Reprogram Competition, Kit Shift, Kit Auto Shift, Kit Stick Shift, Shift Correction Kit
- Shims, Endplay Shims, End-play Shims, End-play Shim, Endplay Shim
- Sleeves, SLEEE, Ground Sleeve, Overlap Control Sleeve, Seal Ring Sleeve, Repair Sleeve, Regulator Sleeve, Modulator Sleeve, Pressure Sleeve, Piston Sleeve, Pinion Repair Sleeve, Damper Sleeve, Bore Sleeve, Boost Sleeve
- 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
- 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,
- converter, t.converter,
- Turbines
- VB plate, Valve body plates, Valve body plate, ValveBody, V/Body, valve-body, v body, v-body, v/b, Orifice, Hydraulic control unit, HCU
Technical issues and repair guidelines
The GM 3T40 is a reliable, simple transmission that operates over 300 thousand kilometers. It served as a prototype for the 4-speed family 4T40E -4T60E.This transmission rarely gets in repair services. The main spare parts ordered for repair of this transmission are the repair kit of gaskets and seals (Overhaul kit) or a complete Masterkit (with clutches and seals).
Instruction manuals and useful links Suggest your link
| Link type | Source | Description |
|---|---|---|
| shop.ukrtrans.biz | Manual ATSG 3T40, 125C | |
| shinseiauto.com | Transmission breakdown illustration 125C | |
| at-manuals.com | Diagnosis and general service 125C | |
| www | Sonnax | GM 125C Checkball Locations |
| drive.google.com | Repair manual 3T40 |