Detailed technical specifications of automatic transmission (Audi 100 C3)

Table of contents: Torque converter ↓ Transmission ↓ Gear ratios ↓ Oils used ↓

The automatic transmission has three forward gears and one reverse gear. It is combined with the differential, main gear and is located behind the engine. Gear shifting is done by a selector lever on the body floor. The selector lever has six positions: "P" - parking, "R" - reverse; "N" — neutral; "D" — automatic switching of I, II and III gears; "2" - automatic switching of I and II gears; "1" — only 1st gear is engaged.

The engine can only be started if the selector lever is in the "N" or "P" position. The oil lines of the torque converter and gearbox are disconnected.

Automatic transmission type:

cars with 4-cylinder engines 089 KAE;
cars with 5-cylinder engines of the models "WH" and "KR" 087 RDC;
cars with 5-cylinder engines of the "WC" and "KU" 087 RDD models.

Torque converter

Marking:

KP type UH9: U;
KP type 087: G.

Control dimensions of the bearing sleeve:

internal diameter, not more than, mm: 34.12.
radial runout, no more than, mm: 0.03.

Torque converter oil hypoid oil GL5: SAE 90; MIL-L 2105 B.

Filling capacities, l:

KP type 089: 0.75.
KP type 087: 1.00.

Transmission

The automatic transmission consists of two planetary gears, which are controlled by three oil multi-plate clutches and a band brake, actuated by a piston. The control high oil pressure acting on the clutch pistons is distributed by a valve mechanism located between the gearbox housing and the oil sump. Oil pressure is provided by an oil pump located in the rear cover of the gearbox housing on a common shaft for the entire gearbox and driven by the engine.

Planetary gear

Catalogue No.:

KP 087 RDC: 087 321 022 VX
KP 087 RDD: 087 321 022 CX
KP 089 KAE: 089 321 022 DX

Main gear

Catalogue No.:

KP 087 RDC: 087 409 508 FX
KP 087 ROD: 087 409 506 KX
KP 089 KAE: 089 409 505 HX

Valve box

Index:

KP 087 RDC:EE
KP 087 ROD: FN
KP 089 KAE: EC

To adjust the 2nd gear band brake, loosen the lock nut, tighten the adjusting bolt first to a torque of 1.00 kgf·m, then loosen the bolt, tighten again to a torque of 0.5 kgf·m and unscrew by 2½ turns, then tighten the lock nut.

Working oil pressure, kg/cm²

Gear shift moments

Gear ratios

KP 089 KAE for cars with the "DS" model engine

Broadcast	Gear ratios
I	2,71
II	1,50
III	1,00
Reverse	2,43
Main gear	3,42

KP 087 RDC cars with engines of the "WH" and "KR" models

Broadcast	Gear ratios
I	2,71
II	1,50
III	1,00
Reverse	2,43
Main gear	3,45

KP 087 RDD for cars with engines of the "WC" and "KU" models

Broadcast	Gear ratios
I	2,71
II	1,50
III	1,00
Reverse	2,43
Main gear	3,25

Oils used

Gearbox housing and torque converter

Oil used: ATF Dexron.

Filling capacities, l:

total: 6.0;
when changing oil: 3.0.

To check the oil level, place the car on a flat horizontal surface, set the selector lever to the "N" position, apply the handbrake, start the engine at idle speed, and warm up the oil in the gearbox sump to a temperature of 40-60°C.