Currently diagnosing a Skytrak 8042 with a zf 4wg98-tc transmission that is dropping system pressure #67 port. Gauge read 180psi upon cold start up, and then dropped to zero before warm up Revving engine makes pressure rise, but no where near stand by pressure. Oil in filter is aerated and foamy. fliter clean. Oil clean. System pressure (modulated) #65 port shows zero psi. Any ideas? Thanks guys
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