Line pressure gauges

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H1-Trans
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Line pressure gauges

Post by H1-Trans » Sun Jul 19, 2015 2:17 pm

So I have finally bought what seems like a good set of line pressure gauges OTC 5610, instead of renting. Ok my question being why do they fluctuate so much when reading line pressure instead of a steady needle I always get the one that jumps between per say 180 and 200 continually depending on gear selection. Anybody have an idea.??? Is this a PR valve issue in the pump, cheap gauges, massive leaks within the trans? ect.......

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tranibob
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Re: Line pressure gauges

Post by tranibob » Mon Jul 20, 2015 11:36 am

Are you gauges liquid filled?
Robert Moreau
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Sonnax Industries, Inc.
Laguna Beach, CA 92651
rmm@sonnax.com

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H1-Trans
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Re: Line pressure gauges

Post by H1-Trans » Tue Jul 21, 2015 10:42 am

No

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tranibob
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Re: Line pressure gauges

Post by tranibob » Tue Jul 21, 2015 11:14 am

That's why you get this bouncing, get some liquid filled gauge and the issue will go away. That way when you see the needle bouncing you know you have a real issue. They put a viscous liquid in there (I believe it is glycerin) to damper the bouncing.
Robert Moreau
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Sonnax Industries, Inc.
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rmm@sonnax.com

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barrycole
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Re: Line pressure gauges

Post by barrycole » Thu Jul 23, 2015 11:32 pm

Have always used fluid filled gauges, you get a better reading. It keeps the needle on a more accurate reading.
Barry Cole Toronto, Ontario, Canada. Retired after 35 years

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