trans gone crazy
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Joined: Sep 2006
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From: Savannah
trans gone crazy
Just got a transmission in the shop out of a buddys truck.... had 300psi of line pressure while it was in truck, I pulled valve body and such found no spring in pressure control valve fixed that did a pressure check no good it failed, had all ready blown lip seal on apply piston from knocking the snap ring out of a drum.... took trans out and took apart on further inspection the pump has what looks to be a Sonix boost valve but no INNER spring has the inner valve but no spring............ my big question is what would be the reason for leaving the 2 springs out... and would either cause the 300psi line pressure .... don't want to run into it after the build... the trans is one he picked up at a salvage yard because of a bad case he had so we have no info on builder .... I do believe it was a fresh build but all parts and inner cases looks really good but has all ford number's on clutches...... thanks any insight would be very helpful.... Phil
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Senior User
Joined: Sep 2006
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From: Savannah
It was it a nice looking truck with the bed knocked off of it .. Mark would leaving the inner boost spring out cause the line pressure to be 300psi...... I wonder if they could have used the sonix valve because it comes with outer and you use your inner and they did not use the inner factory one.... and pulled the one in the valve body to try to get it down thanks Mark
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