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Old 04-24-2003, 01:38 PM
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Cool Tell me about shift kits...

I don't know a whole lot about cars. I'm looking at buying a 1987 Trans Am, and the owner says it's got a shift kit in it. I don't know what a shift kit is, but I would like to learn as much as I can about them. Can anyone give me as much info as they can about shift kits? What do they do? What are their advantages/disadvantages? <img src="graemlins/evil.gif" border="0" alt="[evil]" />

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Old 04-24-2003, 02:46 PM
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A shift kit re-routes and changes hydraulic pressure inside your transmission to create sharper firmer shifts. They can usually be set up for street/strip use or heavy duty use. It's been my experience you can't notice much difference between the setups no matter which one is used.

The stock trans is designed to provide smooth shifts. In order to do this more friction is created and this creates wear on internal parts which limits the life of the transmission. A shift kit will eliminate some of the friction/slipping during the transition between gears and this will generally help your trans last longer.

Hope this helped.

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[ April 24, 2003: Message edited by: Centerline ]</p>
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Old 04-24-2003, 02:56 PM
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Cool

Okay, that helps a lot Centerline, thanks. So, this Trans Am is supposed to be chirping the tires and jerking a bit when shifting? The owner says it does this when driving in town as well. I just want to make sure there's nothing wrong with it before I buy it...
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Old 04-24-2003, 03:59 PM
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I wouldn't describe it as jerking. It should be a firm shift from one gear to the next. The harder the throttle the more firm the shift and yes it probably will chirp the tires occationally even under normal driving.

Centerline
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Old 04-24-2003, 04:14 PM
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Does the firm shifting adversley affect other drive shaft components?i.e; u-joints,rearend or even the mounts?Just curious,I have four speeds in my cars.Bruce
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Old 04-24-2003, 08:02 PM
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How about a TH350 in a 70 nova with a mild 350 engine? Would a shift kit help this car "chirp" tires? Oh yeah, has 3.08's? Just wondering....
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Old 04-25-2003, 03:26 AM
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A good shift kit under normal driving conditions shouldn't be any harder on "U" joints or the rear end than a non-equipped car. However just like anything else if you abuse it eventually something is going to break.

A kit would definitely help the Nova and, given a warmed over 350 motor, even with the 3.08 gearing you should be able to chirp your tires going into second.

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