Electronic transmission control (ETC) diagnosis, troubleshooting, noise - AD27.19-P-5005A

TRANSMISSION 722.6 in MODELS 129, 140, 163, 170, 202, 208, 210

	Electronic transmission control (ETC), diagnosis, previous knowledge		AD27.19-P-2000A
	Troubleshooting
Complaint	Possible cause	Note	Remedy
Howling, droning or jolting when KUB engaged	KUB slip speed too low		Switch off KUB using HHT. If the complaint can then no longer be reconstructed, replace torque converter lockup PWM solenoid valve (Y3/6y6) and reset adaptation values using HHT
Howling noise, whistling at n > 4000 RPM ^-1 in all gears	Oil filter clogged		Replace oil filter
Howling noise, whistling at n > 4000 RPM ^-1 in all gears	Oil pump		Replace oil pump
Howling noise, whining	Ring gear and pinion noise 1st, 2nd, 5th. gear		Replace propeller shaft intermediate bearing (black sealing ring)
Howling noise, whining	Sealing disk of propeller shaft intermediate bearing wipes against bearing inner race		Currently no remedy available, information to VSE/PB with details on VIN and driven distance
Load change noise (crunching noise)	Cracking noise between joint flange and collar nut	Only up to transmission end no. 30332, thereafter collar nut and torque adapted	Mount collar nut with Dacromet coating (tightening torque M=200Nm)
Rattling from floor shift when accelerating	Bushing of selector shaft has too much play	Engine 602 in models 210 to 15.08.97, thereafter play reduced	Replace floor shift with part number 140 260 45 98 and cover with part number 140 267 14 88
Ticking noise from floor shift when driving slowly	Loose post of reverse/parking lock (Y66/1) electromagnetic actuator connector		Check reverse/parking lock(Y66/1) electromagnetic actuator connector, replace if necessary
Load change noise from transmission at approx. 20 - 30 km/h	B3 piston torsional play on drive shaft too large	B3 piston modified as of 12/2000 Transmission end no. 2608822	Repair automatic transmission