700r4 shift shaft seal direction
Joined: Jul 2000
Posts: 6,528
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From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: 700r4 shift shaft seal direction
Spring goes against the oil side.
if the unit had internal pressure, the recessed area where a spring is typically found goes against the oil and internal pressure would tend to help seal lip stay against the shaft.
The shallower ramp-up angle to the seal lip starts at the outside and goes"up to the lip at a lesser angle than the oil side. Don't confuse a second dust lip with the oil seal lip; output / yoke seals very commonly have double lip seals like this.
if the unit had internal pressure, the recessed area where a spring is typically found goes against the oil and internal pressure would tend to help seal lip stay against the shaft.
The shallower ramp-up angle to the seal lip starts at the outside and goes"up to the lip at a lesser angle than the oil side. Don't confuse a second dust lip with the oil seal lip; output / yoke seals very commonly have double lip seals like this.
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