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Old 01-26-2005, 10:07 PM   #1
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Default Shift kit for GM trannys



http://www.proficientperformance.com...&Store_Code=PP


Looks like a plug and play type thing. Would be interesting to try though
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Old 01-26-2005, 10:09 PM   #2
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i dnont know...who makes it? If you look at the bottom of the pic, it says that may not be the actual thing.
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Old 01-26-2005, 10:16 PM   #3
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I think thrasher made one of these a loooong while back and did a write up on it too and how it wasn't really worth it?
Not 100% though.
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Old 01-26-2005, 10:21 PM   #4
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Not really a shift kit. It just increases line pressure a bit so the shifts are a tad quicker. It'* like using the Normal Shift / Perform Shift modes. I don't think it would be worth it, and you really wouldn't go any faster.
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Old 01-26-2005, 10:38 PM   #5
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My dad had one on his GTP that he put on with his 3.4 pulley and TEP CAI when he bought the car. (they were the only 3 mods he had until it had ~15k on it) It worked nicely. The tranny shifted harder and quicker, and if you want to beat on it and smoke the tires on the 1-2 shift you just crank it up all the way, and when you're done having fun, turn the **** back down and drive it normal again. Its not a direct replacement for a shift kit, but it works good, and if you don't want to drop your tranny pan for whatever reason, you don't have to. The setting my dad had his set on for his daily driving shifting significantly harder than his TEP shift kit on medium w/DHP with increased line pressure.

The nice thing about it is ease of installation, it literally takes about 2 minutes to install. Then when you need to get warranty work done (assuming the car is under warranty still) you just unplug it and bring it in. Then when you get the car back, plug it in again and it'll be right back to shifting firm again.

Shawn
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Old 01-27-2005, 01:16 PM   #6
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Notice that this shift modifier is for the 4T65E ONLY. The 96 and up 4T65E has electronically controlled line pressure. The 4T60E'* that most of the n/a H bodies have still have an old-fashioned vacuum referenced line pressure modulator, for which a plug in shift modifier will not work.
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Old 01-27-2005, 02:46 PM   #7
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they make shift improvers( like a shift kit) for the 4t60-e B and M makes it
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Old 01-27-2005, 04:11 PM   #8
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What about 4T60? Isn't the '-E' just electronic, and everything else is the same, and that shift kit could work for me too?


-justin
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Old 01-27-2005, 05:48 PM   #9
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Theres this one too for the 4t60-E guys.

http://www.proficientperformance.com...&Store_Code=PP

Id like to try it before I buy it though.
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Old 01-27-2005, 05:58 PM   #10
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Wow, this is cool.. it seems overpriced, but it'* a shift improver for vacuum operated hydraulic transmissions [like mine].

http://www.jcwhitney.com/autoparts/P...X/appId-506458

Wonder if I could make my own?
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