Transmission experts please help...
Thread Starter
STF Veteran
Joined: Oct 2003
Posts: 3,486
Likes: 0
From: Greensboro, North Carolina
Transmission experts please help... I bought a 99 SS a few months ago. The guy I bought it from was the second owner. He said he serviced the transmission and said it has a Red converter in it(I assume it is a Yank but I am not sure). He couldn't tell what the stall was. My concern is, my car shifts very hard from 1 to 2, but not any other gear. It also locks up very hard(It makes a clunking noise when it the converter locks up). Does anyone have any idea what could be causing this and is it bad or normal? I haven't ever had a car with a after market converter in it so I don't know what to expect.
Thread Starter
STF Veteran
Joined: Oct 2003
Posts: 3,486
Likes: 0
From: Greensboro, North Carolina
Originally Posted by Dom
Clunking noise? Make sure you dead hook.
What does "dead hook" mean?
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo Thread Starter
STF Veteran
Joined: Oct 2003
Posts: 3,486
Likes: 0
From: Greensboro, North Carolina
Well having heard you're comments. I have also heard that too much line pressure is very bad for a transmission. I have the HPP3 with the shift firmness up 25%. Is that going to cause a problem?
Originally Posted by 99-LS1-SS
Well having heard you're comments. I have also heard that too much line pressure is very bad for a transmission. I have the HPP3 with the shift firmness up 25%. Is that going to cause a problem?
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
I agree with DOM. I'm not confident that adjusting line pressure by way of the PCM is the best thing to do (and it really doesn't help WOT shift much if that's what you're looking for.)
You might alleviate your hard shifting by setting the HPP3 back to stock. Other than that I would have a tranny expert check to see if you have a shift kit in there if it really bothers you.
You might alleviate your hard shifting by setting the HPP3 back to stock. Other than that I would have a tranny expert check to see if you have a shift kit in there if it really bothers you.
Sounds like he has a transgo shift kit in it with three washers(firmest setting) in the accumilator. Take to a tranny shop and have them remove 1 or 2 of the washers.The more washers you remove the softer the shift.