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what shift kit to go with???

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Old Mar 22, 2011 | 09:18 PM
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Default what shift kit to go with???

I'm building a 1970 Trans Am with a LS1 & a 4l60e tranny out of a 2004 GTO with 19000 miles. The engine will be about 525 HP with all the mods (NA, no turbo or NOS). It will have a 3.43 posi in the rear & a 3200 stall Precision
Industries Vigilante torque converter. My question is which shift/rebuild kit should I get for it? I may take it to the strip 1 time a year & auto cross it about the same. It will mostly be a nice show car I can drive on the Power Tour & compete in some events in.
Should I just get a basic TransGo HD2 shift kit for about $80? What about some of these more expensive kits from Pro-Built Automatics like the 4L60E Street/Strip Perf Upgrade or the 4L60E Street/Strip Perf Upgrade w/vacuum modulator? What does the vacuum modulator even do? I also looked at a few kits from monster trans but they had a lot more parts & were more $.
Thanks & let me know what you guys think.
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Old Mar 22, 2011 | 09:31 PM
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with that power output you might look into having one of our sponsors (FLT for one but there are several) build either a 4L60 or 4L80. I dont see a stock trans lasting too long or being reliable with that power.
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Old Mar 22, 2011 | 09:50 PM
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The basic transgo kit is well worth the money and a snap to install.
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Old Mar 22, 2011 | 10:08 PM
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From being on this board a while all I hear is the transgo. If I was doing one thats what I would do.
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Old Mar 23, 2011 | 04:43 AM
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Another for transgo. Did one in a 4L60 and now in a th350. Wouldn't go any other way.
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Old Mar 23, 2011 | 05:46 AM
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Originally Posted by crankstart
The basic transgo kit is well worth the money and a snap to install.
A snap for who to install? An experienced tranny builder while your transmission is apart for a rebuild?

The HD-2 kit seems to be the go to kit for the 4l60e. My trans builder recommended it for my build. With 525hp I would highly recommend a "built" transmission and not just a shift kit. A shift kit only will not make your transmission last under those power levels.
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Old Mar 23, 2011 | 06:46 PM
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10-4, Thanks guys!
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