Home		Diagnosis - Limp home - Transmission origin

Symptom	Description
Speed sensor failed/failing	speed sensor is located in gearbox above output shaft -- for 735i 02/1988 should show 540 ohms (+/- 10%) on pins 3 & 4at plug X2005 (G/B connector) OR pins 27 & 8 at plug X2000 (TCU) speed sensor can fail gradually -- eventually goes "circuit open" photos and fix here
Low oil pressure	gearbox mechanical problem gearbox pump is worn OR oil seals in clutch basket are worn OR oil level is low, there is insufficient pressure to prevent clutch slip photos and fix here (TBA)
Valve body problem	electrical relays not responding photos and fix here (TBA)
Dirty gear indicator switch	electrical switch problem crud/wear prevents this rather simple multi-contact switch from working photos and fix here
TCU connection to gearbox NG	electrical plug or wires gear selector signal is not valid photos and fix here (TBA)