Adjusting the gearbox control drive (BMW 3 Series E21)

Make sure the transmission crossmember is securely fastened.

Disconnect the gearbox control rod 1 from the intermediate gear selection lever 2.

Set the gear selection lever 3 on the gearbox housing to position "0" (or "N").

Move selector lever 4 until it stops against limiter 5 of the linkage.

Change the length of the gearbox control rod 1 so that the joint 6 coincides with the lower part of the intermediate gear selection lever 2.

Reduce the length of the transmission control rod 1 by turning its end one full turn.

Connect the gearbox control rod 1 to the intermediate gear selection lever 2.

Adjusting the throttle control rod on vehicles with 4-cylinder engines

Warm up the engine.

Make sure that:

• sector 1 of the throttle control valves rests on stop 2;
• lever 4 of accelerator pedal 10 rests on stop 5.

By turning nuts 7, adjust the length of the throttle control rod so that it is not excessively tensioned.



In this case, the gap "S" in the threaded connection of the throttle control sector should be within 0.2-0.3 mm.

Check whether the throttle opening limiter 3 rests against stop 2 when the accelerator pedal position corresponds to full throttle.

Adjusting the forced downshift rod on vehicles with 4-cylinder engines

Adjust the throttle control linkage.

With the accelerator pedal in the idle position, adjust the gap "A" with screw 8, which should be within 0.25-0.50 mm.

Press the accelerator pedal to the forced downshift position and measure the gap "A", which should be within 43.5-51.5 mm.

If the obtained value does not fit within the specified limits, achieve the required clearance by turning screw 11.

Adjusting the throttle control rod and the forced downshift rod on vehicles with O-cylinder engines

Check the length "L" of rod 1, which should be within 165±0.5 mm. If it deviates from the norm, achieve the proper size by turning the nuts at the ends of the rod.

Make sure that the roller "R" of the throttle control rod lever rests on the working surface "F" of the lever with the slot "K" and that its idle stroke before the final movement of the throttle control sector does not exceed 1.5 mm. If necessary, achieve this condition by moving the throttle control drive in the oval holes "L" shown on the left side of the figure.



When the accelerator pedal is released, the throttle control rod should not be taut. In this case, the gap "D" in the threaded connection of the throttle control sector should be equal to 0.5 mm.

With the engine idling, check the gap "Z" between tip 6 of the throttle control rod and the end of the rod 7, which should be within 0.25-0.75 mm. If necessary, achieve the proper size with nuts 2.

After loosening nut 3 under the accelerator pedal, screw in stop 4 for forced engagement of a lower gear.

Press the accelerator pedal to the position corresponding to full throttle. Without changing the position of the accelerator pedal, turn the stop 4 of forced engagement of the lowest gear until it touches the accelerator part.

Press the accelerator pedal sharply to the stop, i.e. to the position of forced engagement of the lowest gear. In this case, the gap "Z" between the tip 6 and the end of the rod 7 should be at least 45 mm.