I inherited a 1985 LS from my dad and the trainy is leaking ATF from the vacuum capsule (part # 160 on the exploded view). I am planning to remove it and put a non-drying gasket cement on it. When I put it back, how many turns should I back it out after screwing it in all the way?
Thanks for your wisdom that you share on this forum.
San Jose, Ca
Hello Reuben :If you have not removed the Vacuum Capsule
:Check to make sure that it is leaking from the mounting base and not the center area and also check to make sure it holds a vacuum. If it is leaking from the center or if it does not hold a vacuum: do not remove it until you get a new one. They show up on eBay sometimes at a good price otherwise its Mobility or Greg.
The Vacuum Capsule has a locking tab that has an indicator on it; mark the locking tab (bracket) that holds the Capsule in place and the Capsule itself at the point where the indicator and the capsule meet with a little paint. Also mark the side of the capsule at its base with paint. Once the paint dries count the turns as you remove it. It should be 2.5 to 3 turns. The paint will save you the trouble of adapting and attaching a gauge to adjust the Capsule.If you are installing your old Capsule
: screw it in until the paint marks line up.INSTALL:
The Capsule has an O on the body replace it; then use a little transmission oil to lubricate the O ring and body and it should take care of the leak. For a new Capsule
: Screw in the Capsule 2.5 to 3 turns and attach the locking plate. ADJUSTMENT:
The vacuum Capsule regulates the pressure of the transmission fluid depending on how much vacuum it gets from the engine. The way to check if you have the correct pressure is to connect a gauge to the transmission by removing the plug illustrated and attach an adapter with an attached hose that is long enough to reach the inside of the vehicle and connect a Bar gauge to the other end of the hose. Then you drive the RV until warm and select 2nd gear. While driving in second gear at 50mph the correct pressure should be 4.6 bars. To increase pressure your turn the Capsule clock wise and counter clockwise to decrease pressure. Every two notches (as indicated by the locking tab) is 0.1 bars.
I know it can sound complicated so email me if you have any questions, I will try to help.