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Old 06-10-2010, 10:29 AM   #1
D-Rat
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Leaking Transmission fluid

It's leaking around the vacuum modulator. Probably needs a new O-ring. anyone know the specs on that (size/thickness)?

ETA: It's a TH350 trans
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Last edited by D-Rat; 06-10-2010 at 04:26 PM.
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Old 06-10-2010, 07:56 PM   #2
mclairmo
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Re: Leaking Transmission fluid

If you take the old one to Napa or Kragen they can match it up. They have every size. Also, new modulators come with a new o-ring and tube for liek $10-$15. If the o-ring is shot, the valve itself may be very old, too. Also, check that it's not leaking from the valve itself. Also, check that the bolt that holds the clamp on the valve is not loose.
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Old 06-10-2010, 08:09 PM   #3
D-Rat
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Re: Leaking Transmission fluid

This is a brand new modulator I got from Napa, but it didn't come with an O ring, the buggers. So I reused the O ring from the old one (that wasn't leaking, mind you), and now I have a puddle of trans fluid in my driveway.

Maybe the truck is just irked that it's so hot this week.
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Old 06-11-2010, 04:15 AM   #4
beebster
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Re: Leaking Transmission fluid

Believe it or not, when i changed my vacuum modulator i got different shift points.
better shift points (3rd comes quicker)
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