yo 68,
Flex Plate Installation Instructions; C-4, C-6 & AOD
Source: by bmracing @
http://bmracing.com/wp-bnmcont/uploads/114501.pdf
Significant EXCERPTS:
Leaks can be caused by several reasons. The most common are front seal failure and vibration cracks.
Front seal failure is due to improperly installed seal (damaged during installation), misalignment, worn pump bushing, or worn converter impeller hub.
A ballooned converter can have a slightly bent impeller hub. Inspect the pump bushing when you replace the seal.
Check dowel pins in the engine block for sufficient engagement and polish the converter impeller hub with 400 grit
wet and dry sandpaper and oil.
Cracks can develop in the impeller hub or perimeter weld from stress and vibration. If a crack occurs around the
impeller or pilot hub we recommend you return it for repair.
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Typical C4 leakage points are the pan gasket along with front pump and output shaft yoke seals. Whenever you rebuild a C4, make sure these seals get abundant lubrication. Transmission assembly **** is perfect for these seals.
This keeps them pliable for dry start-up. What kills seals more than anything is long storage periods followed by dry start-ups. Mixing transmission fluid types can also damage seals.
Because C4s generate high temperatures, heat takes a toll on fluid, friction materials, seals, and even hard parts like planetaries, clutch drums, and pistons. This is why having clean fluid and a fresh filter is so important. A C4's filter doesn't filter fluid as finitely as an engine's oil filter for example. It is more like a screen designed to catch particulates and other contaminates that can render your transmission inoperative in short order.
Add fluid to the FULL mark. After an open road drive, examine fluid consistency and color. If it is foamy, the transmission is overfilled. It's always best to underfill, then add as necessary. If you overfill, you will have to either siphon fluid out or loosen the pan. Never check transmission fluid level cold; always check at operating temperature
Read more:
http://www.mustangmonthly.com/techarticles/mump_1101_service_ford_mustang_c4_transmissions/viewall.html#ixzz2DoDZmTFo
Read more:
http://www.mustangmonthly.com/techarticles/mump_1101_service_ford_mustang_c4_transmissions/viewall.html#ixzz2DoDQCEsu
Read more: by Jim S at
http://www.mustangmonthly.com/techarticles/mump_1101_service_ford_mustang_c4_transmissions/viewall.html#ixzz2DoD7gIRU
Read more:
http://www.mustangmonthly.com/techarticles/mump_1101_service_ford_mustang_c4_transmissions/viewall.html#ixzz2DoCzlMxb
By Jasper;
Check area for tool gouges or cracks
If in bellhousing area, check converter for crack
Fasteners over or under- torqued
by gregaust:
2 seals at the shift linkage , the inner rarely leaks , the small outer o'ring type seal is most common and easily replaced by only removing the kickdown linkage .
Cooler lines ?
There are o'rings under the case adaptor fittings also go pretty hard with age
