Volvo Owners Club Forum - View Single Post - AW 55-50 Transmission Glad to help!

bubbster · Apr 12th, 2010, 12:05

HI,

Thanks for that attachement on the AW55-50.

I have a 01B serial number? I have the exact symptoms below (lifted from the attached doc) - which have been intermittant which has led me to believe that this is electrical;

Description: This transmission relies on adaptive data to properly adjust the shift pressure. If the adaptation is not complete, it may result in one or more of the following:

• Harsh flare. Engine RPM will increase during a shift. This symptom feel like the transmission has lost drive. It usually happens during the 2-3 shift.
• Harsh down shift. Bumpy down shift when the gas pedal is odd (Zero).
• Harsh Garage shift. Sever bump when engaging forward or reverse from park or neutral.
• Harsh engagement control. After coming to a complete stop in drive, with the foot on the brake, the TCM waits for 2 seconds and then disengages drive to reduce emissions. This disengagement is not usually felt by the driver. If adaptation is not complete, then a “thud” will be felt. A harsh re-engagement will also be felt.

Any one got any advice? I will try to reset the adaptive settings, but unsure if this is all it will take, or whether this will re-occur.

ALso, I broke two of the orange rubber gasket seals on the electrical connectors from the Tranny when inspecting (to clean contacts and investigate). Any hints as to how to replace these - if needed?)

Was also wondering whether the B4 servo cover was easily replaced, or is it an engine out job?

Many thanks

Apr 12th, 2010, 12:05	#20
bubbster New Member Last Online: Mar 8th, 2011 10:33 Join Date: Dec 2009 Location: cranleigh	adaptive settings? HI, Thanks for that attachement on the AW55-50. I have a 01B serial number? I have the exact symptoms below (lifted from the attached doc) - which have been intermittant which has led me to believe that this is electrical; Description: This transmission relies on adaptive data to properly adjust the shift pressure. If the adaptation is not complete, it may result in one or more of the following: • Harsh flare. Engine RPM will increase during a shift. This symptom feel like the transmission has lost drive. It usually happens during the 2-3 shift. • Harsh down shift. Bumpy down shift when the gas pedal is odd (Zero). • Harsh Garage shift. Sever bump when engaging forward or reverse from park or neutral. • Harsh engagement control. After coming to a complete stop in drive, with the foot on the brake, the TCM waits for 2 seconds and then disengages drive to reduce emissions. This disengagement is not usually felt by the driver. If adaptation is not complete, then a “thud” will be felt. A harsh re-engagement will also be felt. Any one got any advice? I will try to reset the adaptive settings, but unsure if this is all it will take, or whether this will re-occur. ALso, I broke two of the orange rubber gasket seals on the electrical connectors from the Tranny when inspecting (to clean contacts and investigate). Any hints as to how to replace these - if needed?) Was also wondering whether the B4 servo cover was easily replaced, or is it an engine out job? Many thanks