I put a Crane Cam in my 1988 305 TPI and I know it moved my redline back a little and I'm not for sure how much. I left the tranny in 1 and nailed and ran to about 5800 and the valves floated. I was just wondering why and if it's hard on my car? Also I have a flowmaster exhaust and I love the attention it gets when I leave the car in 2 instead of driveing around town in drive. I'm wondering if this is hard on the tranny to drive aroud in 1 and 2 and then shift at like 3500?

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1988 GTA:
Crane Cam, K&N,
Flowmaster, Off Road Pipe.

 

GTA,

MAnually shifting an automatic transmission causes firmer shifts because the oil pressure in the transmission valving is not regulated down in anything other than DRIVE or OD. The clutches will tend to wear faster, and the extra forces will reduce the life of the planetary sets to some extent. If you drove a vehicle like this for its entire service life, the transmission would statistically fail sooner. How much sooner is anyone's guess. If you only do this occasionally, the damage should be minimal. It will be far more important to change the oil in the transmission regularly, and a drain plug will make the task a lot more pleasant and much faster. I can change transmission pan oil in about twenty minutes, so I end up doing it quite frequently on all my vehicles. All except the newest one (five months old) have drain plugs in the pan, so life is good in HydraMatic land.

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Later,
Vader
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"No matter how hard you try you can't stop us now"
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