Shift extension on PT4200 question.

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Oct 24, 2004 | 07:14 PM

JaSSon

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From: Bridge City, TX

Shift extension on PT4200 question.

Seems my new verter doesnt go down below 6000rpms at WOT. Dont know if the tach is that slow or my tires are bustin loose, their that bald. This is the 2 to 3 shift of course. I thought the SE should be around 5600 or 5700. Any info is great, Thanks

Oct 24, 2004 | 07:32 PM

Ragtop 99

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From: Bethesda, MD

Make a run with autotap or efilive and see if the tach is accurate. 5500 - 5800 would be my expectation.

Oct 24, 2004 | 08:31 PM

zupmanZ28

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i'm having the same thing with my pt4000, doesn't drop below 6200 or so according to the factory tach. I'll be making some logs this week to see whats up...

Eric

Oct 24, 2004 | 09:07 PM

1Hawk

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From: Houston

Autotap sounds like a good idea....F-Body tachs are very inaccurate

Oct 25, 2004 | 05:07 AM

xxxhp

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My PT4000 drops to 5700-5800rpm and this is behind a 427 stroker

Oct 25, 2004 | 09:45 AM

JaSSon

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From: Bridge City, TX

Snap-on scantool showed it dropping to 6000 rpm after 2 to 3 shift and staying there even though the tach on the dash was moving and the car was accelerating faster. I dont know if the loosness of the verter is freakin out the pcm. Car seems to run good and pull hard. Any info or help is appreciated.

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