Drag Racing Tech
Sponsored by:
Sponsored by:

auto tranny question

Thread Tools
 
Search this Thread
 
Old Aug 20, 2008 | 08:43 AM
  #1  
2fstws6's Avatar
Thread Starter
On The Tree
 
Joined: Apr 2007
Posts: 120
Likes: 0
From: Marysville,OH
Default auto tranny question

I read where some have their shift point rpm a little lower going into 3 and 4.
Mine are all set at 6500 right now with a rev limiter setting at 7000. My cam makes peak power at 6300rpm. I was hitting the rev limiter going into 3rd and 4th when my limiter was set at 6800 at that time. I also had not deleted torque/engine management ? abuse mode ? It is now deleted. I also bumped up line pressure to 96psi. Have not ran it yet to see what kind of difference these changes made. Also will it affect my trap speed and et in the 1/4 mile ?
__________________
Reply
Old Aug 20, 2008 | 09:16 AM
  #2  
plaf713's Avatar
TECH Enthusiast
iTrader: (8)
 
Joined: Feb 2007
Posts: 678
Likes: 0
From: schenectady, ny
Default

3-4 is very weak, you should data log it and see whats going on, it could be that the 3-4 clutch is going out.
Reply
Old Aug 20, 2008 | 09:42 AM
  #3  
2fstws6's Avatar
Thread Starter
On The Tree
 
Joined: Apr 2007
Posts: 120
Likes: 0
From: Marysville,OH
Default

Um !! fluid look like new. Shifts fine on the street and it has 26,000 miles with about 20 passes at the strip. I was thinking I probably just did not have enough distance between the shift point of 6500 and the limiter set at 6800 when it hit.
Reply
Old Aug 20, 2008 | 10:38 AM
  #4  
plaf713's Avatar
TECH Enthusiast
iTrader: (8)
 
Joined: Feb 2007
Posts: 678
Likes: 0
From: schenectady, ny
Default

It could be just shift points, but you dont want to be chasing down a problem, find out whats going on in the first place and you wont have to worry about it, im not saying your 3-4 is gone, but its not like its not uncommon. The 3-4 clutchpacks are very weak
Reply
Old Aug 20, 2008 | 11:13 AM
  #5  
2fstws6's Avatar
Thread Starter
On The Tree
 
Joined: Apr 2007
Posts: 120
Likes: 0
From: Marysville,OH
Default

If it does it again I will log a run. Would it hurt anything if I lowered the rpm just a little on it going into 3 and 4 ?
Reply




All times are GMT -5. The time now is 04:09 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE