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Change shift points

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Old Aug 24, 2008 | 03:15 PM
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Default Change shift points

I have a 1998 vette and I was wondering if there is a way to change the shift points on my auto trans.? It shifts at about 54 mph and I'd like to move it up to about 60 mph.
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Old Aug 24, 2008 | 05:23 PM
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get a predator (hand held) you can change shift points, firmness, a/f, timing, turn things off, turn things on.
.
http://www.afterthoughtsauto.com/diablosport.html
.
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Old Aug 24, 2008 | 05:37 PM
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I changed mine with EFILive, a scanning tuning software/hardware package. You can also have a local tuner do it as part of a complete tune for less than what that cost.
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Old Aug 24, 2008 | 05:41 PM
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I 2nd the EFILive....
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Old Aug 24, 2008 | 06:32 PM
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It is my understanding that ONLY a Hypertech unit ($400) will do the job (& more) on '97 & '98 C5s. All others brands will work on the '99 - '04 C5s.

Hoping I get one for Xmas..............
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Old Aug 24, 2008 | 07:03 PM
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You guys are great! I'm trying to get a couple of tenths off my 0 to 60 time. When I got it it was running about 6.2. After changing plugs, wires, etc., and a little fiddling around I got it down to 5.43 seconds. It shifts at around 54 mph and seems to take forever, to get to 60. I'm thinking I could pick up a couple of tenths if it could hang in first to 60. I read somewhere that I should be able to get to 60 in 5.1 seconds. Yea, I know I could do it manually, but.......
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Old Aug 24, 2008 | 08:49 PM
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Old Aug 25, 2008 | 01:59 AM
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Originally Posted by Bill K
I 2nd the EFILive....
I third EfiLive!
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Old Aug 27, 2008 | 04:41 AM
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You guys can 1st, 2nd, & 3rd the EFI Live and the rest all you like, but none of them is going to work on the '97s & '98s. READ the ads!!!

The writer has a '98!

REPEAT - ONLY a Hypertech will work on '97s & '98s. All the rest work on '99s - '04s.

I would like to have someone prove me wrong so those of us that own '97s & '98s would have more options.................

Last edited by HawnHog; Aug 29, 2008 at 01:29 AM.
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