Vented transmission?

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Author Message   Porter Mann (Porter) Member Username: Porter Post Number: 84 Registered: 05-2003 Posted on Monday, November 10, 2003 - 03:50 pm:    I have a 96 Disco, and I want to know - is the transmission vented? The reason I ask, is that I guess some transmissions (not LR) are vented but I wasn't quite sure wheter the Disco was or not.   Bill Bettridge (Billb) Dweb Lounge Member Username: Billb Post Number: 1232 Registered: 02-2002 Posted on Monday, November 10, 2003 - 04:08 pm:    Yes, the ZF is vented - the breather line ends right behind the coil pack (gems motor) at the top of the trans tunnel. Breather line for the LT230 is right beside it. Bill   Porter Mann (Porter) Member Username: Porter Post Number: 85 Registered: 05-2003 Posted on Monday, November 10, 2003 - 05:50 pm:    If that's the case, then why is there such a worry about overfilling, wouldn't excess ATF simply overflow from the breather lines?   Bazzle (Bazzle) New Member Username: Bazzle Post Number: 36 Registered: 09-2003 Posted on Monday, November 10, 2003 - 06:57 pm:    Excess oil foams up, also extra drag creates heat. bazzle   Bill Bettridge (Billb) Dweb Lounge Member Username: Billb Post Number: 1233 Registered: 02-2002 Posted on Tuesday, November 11, 2003 - 10:14 am:    ZF transmissions are very sensitive to overfilling - more so seemingly than other autoboxes. The vent is just that - it vents air - if you're venting ATF then you have issues. Besides the damage to the trans, you would also be spilling hot ATF on hot exhaust manifolds, etc . Not sure if you've ever seen an ATF fire, but it ain't pretty and the stuff burns hot! Bill