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Old 06-26-2011, 07:09 PM
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TH350 issues

Hey all i got a trans issue wanna see what you guys think. is a 73 th350 my line pressures are very low 10psi at idel around 60 under load in drive. trans has a b&m shift kit w 1 check ball new torque converter new modulator valve w the red band around it. the question is am i looking at a bad front pump or an over haul??
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Old 06-26-2011, 09:39 PM
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if the presures are low across the board not just in any certain gear then you definatley have a pump pressure issue has any work been done internally to the trans? did this happen after the SK install?
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Old 06-27-2011, 07:14 PM
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not sure of internal work. shift kit was installed wrong from previous owner.replaced kit w b&m kit car will move but have low line pressure in all gears.rpm has to be 3 to 4k for the trans to engage
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Old 06-27-2011, 07:35 PM
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Quote:
Originally Posted by chrisomega
not sure of internal work. shift kit was installed wrong from previous owner.replaced kit w b&m kit car will move but have low line pressure in all gears.rpm has to be 3 to 4k for the trans to engage

if 1 check ball is not installed near the inner modulator valve, main line pressure will be low in all ranges.
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Old 06-27-2011, 07:52 PM
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OK. the b&m kit only has one ck ball in it i put it in were the instructions say to place it. the valve body in my trans has one ck ball in it. got a picture of were this ball is supposed be located???
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