4L60E Transmission Issues - CamaroZ28.Com Message Board

LS1 Based Engine Tech LS1 / LS6 / LS2 / LS3 / LS7 Engine Tech

4L60E Transmission Issues

Reply

 
Old 03-05-2013, 03:46 PM
  #1  
Registered User
Thread Starter
 
Z28silverstreak's Avatar
 
Join Date: Nov 2009
Location: Hudson, IL
Posts: 37
4L60E Transmission Issues

Alright here's what I've got. I've got a '98 Z28 that's got 112k miles on her,a mild cam, and a few other bolt on's that are irrelevant. I just picked her up for practically nothing. I've got it running great now, and took it for a quick cruise to see what it would do. It makes the transitions from N-R and N-1 just fine, makes 1-2 fine, and at about 25 mph in second it feels like it goes into neutral. However, from a dead stop it made it to 80 mph in third with no problems. When in 2nd, after it feels like it goes to neutral I let off completely and I can feel it lock back into second. According to my Snap-On Solus scan tool, the TPS is working alright, and there are no codes from engine or trans. Does anybody have any insight on this? Your help is greatly appreciated.
Z28silverstreak is offline  
Reply With Quote
Old 03-06-2013, 03:35 PM
  #2  
Registered User
 
WhiteHawk's Avatar
 
Join Date: Feb 2004
Posts: 943
Re: 4L60E Transmission Issues

Originally Posted by Z28silverstreak View Post
Alright here's what I've got. I've got a '98 Z28 that's got 112k miles on her,a mild cam, and a few other bolt on's that are irrelevant. I just picked her up for practically nothing. I've got it running great now, and took it for a quick cruise to see what it would do. It makes the transitions from N-R and N-1 just fine, makes 1-2 fine, and at about 25 mph in second it feels like it goes into neutral. However, from a dead stop it made it to 80 mph in third with no problems. When in 2nd, after it feels like it goes to neutral I let off completely and I can feel it lock back into second. According to my Snap-On Solus scan tool, the TPS is working alright, and there are no codes from engine or trans. Does anybody have any insight on this? Your help is greatly appreciated.
From a dead stop you were at wide open throttle up to 80? Did you check the fluid?

-Geoff
WhiteHawk is offline  
Reply With Quote
Old 03-06-2013, 03:47 PM
  #3  
Registered User
Thread Starter
 
Z28silverstreak's Avatar
 
Join Date: Nov 2009
Location: Hudson, IL
Posts: 37
Re: 4L60E Transmission Issues

Yes, fluid is right where it should be when hot, is not burnt and is brand new. When I left for the first drive it always seemed like it went into neutral at a certain sweet spot, and if I let off and feel it go into gear, I get all over it and it burns the tires, but under light throttle it does the same thing. Does the TCM need to see throttle percentage separate of the ECM?
Z28silverstreak is offline  
Reply With Quote
Old 03-06-2013, 03:54 PM
  #4  
Registered User
Thread Starter
 
Z28silverstreak's Avatar
 
Join Date: Nov 2009
Location: Hudson, IL
Posts: 37
Re: 4L60E Transmission Issues

Also the fluid that I drained was not burnt, and did not have any metallic powder in it.
Z28silverstreak is offline  
Reply With Quote
Old 03-07-2013, 03:13 PM
  #5  
Registered User
Thread Starter
 
Z28silverstreak's Avatar
 
Join Date: Nov 2009
Location: Hudson, IL
Posts: 37
Re: 4L60E Transmission Issues

Thanks for the help guys, I ended up removing the valve body and applying air to the clutch apply passageways, and the 1-2 clutch pack leaks a little and the 3-4 clutch pack leaks A LOT...time to yank it out and put a 6 speed in it!
Z28silverstreak is offline  
Reply With Quote
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
thenewkid
LT1 Based Engine Tech
4
04-12-2015 08:42 PM
jackpawt883
General 1967-2002 F-Body Tech
1
02-26-2015 10:04 PM
thenewkid
New Member Introduction
5
11-27-2014 10:41 AM
Snoman73
Cars For Sale
0
11-17-2014 08:22 PM
Trans Am WS6 420
LS1 Based Engine Tech
3
07-19-2002 07:58 AM


Thread Tools
Search this Thread
Quick Reply: 4L60E Transmission Issues


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.