Storing 1990 Chevrolet Corvettes - Tech Corner

James Berry Nov 1, 2009 0 Comment(s)

10. If you have a manual-transmission car, it's a good idea to disengage the clutch. This will keep the clutch disc from sticking to the flywheel. Simply cut a 2x4 board to fit the length from the clutch to the seat. Wrap the board in a towel and wedge it between the clutch pedal and the floorboard or against the lower front of the seat cushion area. Take care not to put anything directly on the seat cushion, as this could damage the cushion over the course of storage.

11. Place some desiccant packages in plastic bowls in the interior. Also place a plastic bowl with mothballs in the interior and engine compartment. The desiccant will absorb moisture, and the mothballs will deter rodents.

12. Jack up the car in the correct locations and install jackstands with protective pads (rubber pads or heavy towels will work) under the front and rear suspension. This will keep the suspension loaded, just as it would be if the tires were resting on the ground.

13. Lube the entire suspension-front and rear-and check the rear differential for leaks and fluid-fill level. If your car has a manual transmission, perform the same checks on the trans at this time.

14. Insert some towels in the exhaust tips. This will help keep rodents from nesting inside your exhaust.

15. Place a drain pan under the transmission and rear differential. This will catch any leaks that may occur during storage. Remember: on a vehicle with an automatic transmission that's stored for several months, the torque converter will drain back into the trans, and the fluid will overflow. (See our next entry for more info.) The pan will catch this fluid.

16. It's also a good idea to rotate the engine and the rear axle by hand once a month. This will actuate the valvesprings and keep the ring gear and pinion lubricated in rearend fluid.

17. Cover your car with a proper, inside-use car cover. You'll need a cover that will protect the car from dust. It should be made from 100 percent cotton or a cotton/polyester blend. A fleece-lined cover is preferable for use with a show quality car.

I hope this answers your question, and have a great trip.

Vemp_0911_04_z Storing_1990_chevrolet_corvettes Transmission_filter 1/5

Question:I have an all-original '84 Corvette with about 66,000 miles. About three years ago the transmission started to leak, but only when the vehicle was parked for a long period of time, such as over the winter. I place a one-quart pan under the trans before storing the car, and the pan is full by the time I take it out of storage.

I've replaced the transmission filter, gasket, and pan, but nothing has changed. I've taken the car to dealers and even to a shop that only works on Corvettes, and no one can figure out where the leak is coming from. The only telltale sign is at the heads the transmission-pan bolts, where there are some red droplets. Any suggestions?
Michael
Via the Internet

Answer:It sounds like the fluid in the torque converter is draining back into the transmission, overflowing, and coming out through the vent tube or a seal. While this is the most likely cause of your leak, there are other problems that could be to blame.

Did you look for an imperfection in your transmission pan when it was off? If the sealing flange is bent, a new gasket won't repair the leak. If you're seeing drop marks on the pan bolts, remember: The leak could be running down from a another area, giving the appearance that the pan is leaking.

It's recommended that you start your car once a month to keep the fluid circulating. If you're out of the area, have a friend start it for you. Even if you don't drive the car, let it run until it reaches operating temperature.

The following is the recommended procedure for diagnosing a transmission leak on any Corvette:

1. Verify that the leak is transmission fluid. Automatic-transmission fluid should be red in color.

2. Thoroughly clean the area you think is leaking, including any higher areas where the leak could be originating.

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