4L80E transmission problems
Help Need direction before I start throwing $ away. 91 G-30 with 6.2 and 4l80e trans. Truck runs great, no slipping ect. After warming up will get check engine light but no codes. When this happens it seems like trans is in neutral when starting from a stop then goes with a bang. OD also will seem to drop in and out of gear at 55-65. Check engine light will not stay on but flashes. When truck runs OK light is off but when it comes on the problems start. Will not set a code. Considering the input and output speed sensors as a place to start. Fluid and filter is new and old one was good too with nice clean fluid coming out. Only 55K on truck.
Any ideas??
Last edited by DILLIGAFRI; 03-05-2008 at 12:52.
Reason: email
1998 K-1500 ex-cab 6.5<br />1988 P-30 box truck 6.2<br /
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