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Old 08-28-2006, 11:56 PM   #1
Scooby Newbie
Member#: 72021
Join Date: Oct 2004
Location: BARBADOS

Default Dropping Resistor Question

I own a 1999, automatic transmission, Subaru Impreza and I would like to know what is the function of the dropping resistor. It's located on the strut tower. I believe it is related to the transmission but can anyone tell me the purpose of it and how it operates.

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Old 08-30-2006, 12:55 PM   #2
Scooby Guru
Member#: 4800
Join Date: Mar 2001
Chapter/Region: TXIC
Location: Houston, Tx
1990 Legacy & 97 OBS


It ties into the shift B solenoid I believe. What it does is provide a place to sink current. The TCU will vary the voltage which varies line pressure on the shift solenoid. The resistor dissipates extra current in the form of heat.

Some people have removed this resistor, which gives firmer shifts, but can lead to the damage of the transmission.

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