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Automatic Gearbox parts and their functions

6 top-level parts · 21 parts in total · full bill of materials below

#	Part	Qty	What it does
1	Gearbox Housing	1×	Rigid cast housing that holds the gears and bearings in alignment, contains the lubricant, and mounts the gearbox to the machine.
2	Torque Converter	1×	Fluid coupling multiplying torque at low speed.
3	Helical Gear Pair	8×	Planetary ratios
4	Valve Body	1×	Hydraulic control block selecting gears.
5	Ball Bearing	6×	Deep-groove radial ball bearing.
6	Oil Seal	4×	Spring-loaded rotary lip seal that keeps lubricant inside a housing and dirt out where a shaft passes through, sized to DIN 3760.

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Build & assembly graph

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Bill of materials for Automatic Gearbox

6 top-level lines · 6 rows shown · 21 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Gearbox Housing	gearbox-housing	1×	1	·	part
2	Torque Converter	station-wagon-torque-converter	1×	1	·	part
3	Helical Gear Pair	gear-pair	8×	8	·	part
4	Valve Body	station-wagon-valve-body	1×	1	·	part
5	Ball Bearing	ball-bearing	6×	6	·	part
6	Oil Seal	oil-seal	4×	4	·	part

Where the automatic gearbox is used

2 products across 1 domain contain it, directly or inside a sub-assembly

• Automobiles 2 Convertible Car, Station Wagon

Used in 2 assemblies

Powertrain Powertrain

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $1–$300. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇮🇳Sona Comstar sonacomstar.com ↗	Gurugram, IN	EV driveline & motors	1,000 pcs	8–12 wks
🇨🇳Zhejiang Shuanghuan shdrive.cn ↗	Yuhuan, CN	Gears & driveline	1,000 pcs	8–12 wks
🇮🇳Bharat Gears bharatgears.com ↗	Mumbai, IN	Automotive gears	1,000 pcs	8–12 wks
🇮🇳ZF India zf.com ↗	Pune, IN	Driveline & chassis	1,000 pcs	8–12 wks
🇨🇳Hangzhou Advance advancegroup.cn ↗	Hangzhou, CN	Gearboxes	1,000 pcs	8–12 wks