Flashing O/D light means an electrical problem in the Auto Tranny. Could be the cause of your odd shifting (maybe even your acceleration depending on if it's slipping or something). Gear grinding sound might just be the speedo cable barely touching the meter. Speedometer cable's on these cars just plug into the back of the gauge cluster.
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1989 7MGTE R154 Targa Top White Package w/Blue Interior
Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels
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