11-25-2018, 12:12 PM | #1 |
Registered User
Join Date: Aug 2017
Location: Calhoun,ga
Posts: 139
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Th350 modulator
So im wondering what would be happening if the line to the modulator on my th350 was just gone? Because its not there its somewhere laying on a road in georgia.
How does it work? And would this have anything to do with my lake size transmission leak? |
11-25-2018, 01:49 PM | #2 |
Registered User
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
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Re: Th350 modulator
modulator does a few things and also controls when the trans shifts along with the govenor .
yes it can be a fluid leak point if the seal inside is bad or the o-ring on the outside to the trans body is bad . there cheep new so i would prob just drop a new one in . also the trans dipstick tube design over the years was a point of leaking on the o-ring style . if you have the full rubber grommet seal they hardly ever leak . the o-ring seal dipstick body design just sucked . best way to seal them is easy . #1 = drain the trans below the dipstick tube level . #2 = clean the surfaces 100% of trans fluid and grime with brake parts cleaner. #3 = good bead of black rtv around the tube body to trans case and let it cure atleast 12 hr's before refill and level check .
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11-29-2018, 12:28 PM | #3 |
Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,387
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Re: Th350 modulator
If the vacuum line is missing it would cause the trans not to shift properly, and the engine to run poorly. The leak will be something else.
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