DTC 28 trany code
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Joined: Oct 2003
Posts: 135
From: Gassville, AR
DTC 28 trany code
I am getting a DTC 28
Transmission Range (TR) pressure switch assembly fault
I have a 93 with a 4L60. It shifts kind of funny. Shifts to early and doesn't down shift well, I have the TV cable adjusted right. The trans was rebuilt about 1.5 years ago by AAMCO before I got the car. What does this code mean? How do I go about fixing it?
Thank You
Taylor
Transmission Range (TR) pressure switch assembly fault
I have a 93 with a 4L60. It shifts kind of funny. Shifts to early and doesn't down shift well, I have the TV cable adjusted right. The trans was rebuilt about 1.5 years ago by AAMCO before I got the car. What does this code mean? How do I go about fixing it?
Thank You
Taylor
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Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
In the "93" setup, DTC 28 is a failure of one of the "Quad Driver" circuits. Not sure if that equates to the same code interpretation as the 94+ PCM code list, which you appear to be using. Maybe there is a 1-to-1 correlation on the 93 vs. 94+ codes, but someone with a 93 needs to confirm this.
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