# '84 Ford F-150 Transmission fluid in vacuum lines

**URL:** <https://community.cartalk.com/t/84-ford-f-150-transmission-fluid-in-vacuum-lines/46279>\
**Category:** Maintenance/Repairs\
**Tags:** transmissions, fluids, ford, f150\
**Created:** [March 18, 2010, 8:14pm UTC](https://community.cartalk.com/t/84-ford-f-150-transmission-fluid-in-vacuum-lines/46279 "2010-03-18T20:14:04Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![hateric](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/hateric/32/1648_2.png) [@hateric](https://community.cartalk.com/u/hateric)\
**Post date:** [March 18, 2010, 8:14pm UTC](https://community.cartalk.com/t/84-ford-f-150-transmission-fluid-in-vacuum-lines/46279/1 "2010-03-18T20:14:04Z")

</div>

Well, the title pretty much says it. My vacuum reservoir is practically full of transmission fluid. Is it time for a transmission rebuild, or is there some easy to replace valve that’s failed?  
  
  
  
 The truck is a '84 F150 302 automatic 2WD

---

<div class="post-metadata">

**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [March 18, 2010, 8:18pm UTC](https://community.cartalk.com/t/84-ford-f-150-transmission-fluid-in-vacuum-lines/46279/2 "2010-03-18T20:18:25Z")

</div>

Your vacuum modulator has failed. Luckily for you it’s not very expensive. This was a common problem back in the 70’s and 80’s.

---

<div class="post-metadata">

**Author:** ![transman618](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/transman618/32/24_2.png) [@transman618](https://community.cartalk.com/u/transman618)\
**Post date:** [March 18, 2010, 8:32pm UTC](https://community.cartalk.com/t/84-ford-f-150-transmission-fluid-in-vacuum-lines/46279/3 "2010-03-18T20:32:18Z")

</div>

Make sure you get the right modulator. Very cheap repair.

transman

---

<div class="post-metadata">

**Author:** ![hateric](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/hateric/32/1648_2.png) [@hateric](https://community.cartalk.com/u/hateric)\
**Post date:** [March 18, 2010, 9:50pm UTC](https://community.cartalk.com/t/84-ford-f-150-transmission-fluid-in-vacuum-lines/46279/4 "2010-03-18T21:50:09Z")

</div>

Thanks ya’ll.