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How do you replace the trans vacuum line that connects to the modulator on a S4?

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Old 09-05-2019, 02:02 AM
  #16  
The Forgotten On
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I bought the kit used in this thread https://rennlist.com/forums/928-foru...-pressure.html as it came with one day shipping from amazon
https://www.amazon.com/gp/product/B000R5G0DO/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B000R5G0DO/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Old 09-05-2019, 09:33 AM
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Kevin in Atlanta
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Originally Posted by The Forgotten On
One of the failure modes of the modulator is to leak trans fluid into the vacuum line causing blue smoke out of the exhaust.

It can literally suck the trans nearly dry of ATF. Not a fun thing to have happen.
Ok. Similar to a failed fuel damper, I get it. Not sure it happens that much. I've never experienced it and can not remember it being discussed here. Waiting to be proven wrong. :-)

Not sure the reduced efficacy routing along the body would further promote running the transmission dry any faster than along the torque tube. If anything the drop from 5 way manifold is steeper.

Plastic tube does not last forever, it abrades and can develop holes. why else are folks replacing it? My 86.5 (long gone) vacuum line had several tiny holes when I replaced with metal brake line over the TT years ago.

The alternative route works better for me. No more chasing disconnected lines behind the upper bell housing and above the exhaust. Like Ed was fond of saying... YMMV
Old 09-05-2019, 11:30 PM
  #18  
GregBBRD
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Originally Posted by Kevin in Atlanta
Ok. Similar to a failed fuel damper, I get it. Not sure it happens that much. I've never experienced it and can not remember it being discussed here. Waiting to be proven wrong. :-)

Not sure the reduced efficacy routing along the body would further promote running the transmission dry any faster than along the torque tube. If anything the drop from 5 way manifold is steeper.

Plastic tube does not last forever, it abrades and can develop holes. why else are folks replacing it? My 86.5 (long gone) vacuum line had several tiny holes when I replaced with metal brake line over the TT years ago.

The alternative route works better for me. No more chasing disconnected lines behind the upper bell housing and above the exhaust. Like Ed was fond of saying... YMMV
We all do whatever works for us, right?



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