Help explain 4L60 failure.

Reply Subscribe

Thread Tools

Search this Thread

Dec 10, 2012 | 10:11 PM

#11

TG02Z71

Thread Starter

TECH Veteran

iTrader: (2)

Joined: Mar 2003

Posts: 4,134

Likes: 0

From: Wisconsin

Quote:

Originally Posted by silverz28camaro

Definitely post up what you find during teardown, but I'm wondering if something happened in the low/roller clutch area..

How did the truck shift before the issue? was it bang shifts? or did it hit hard going into gear from nuetral...I know this has caused issues in the past where to much Park/Nuetral pressure into gear has blown out snaprings on these transmissions

The truck had no issues going from neutral to drive or from park to drive that was always smooth. When you hit 2nd gear at more than 30-40% throttle it would chirp the tires going into 2nd gear. I had about 20k miles on the trans and most of that was pretty light use since I had either cracked a piston or ring land and it has been pushing boost into the crankcase for years. I used my company car for soo long I just never had the time or money to fix the truck, plus getting divorced and being broke for several years did not help.
Thinking about bailing on the whole modding the truck thing once and for all.
this thing has cost me way too much money over the years. Maybe I should have divorced my truck along with the ex wife??

Dec 10, 2012 | 11:31 PM

#12

silverz28camaro

TECH Fanatic

iTrader: (20)

Joined: Sep 2008

Posts: 1,943

Likes: 1

From: st.louis

Quote:

Originally Posted by TG02Z71

The truck will not roll back even in neutral. I jacked the back up just to move it. When I had the back in the air I tried to rotate the wheels. Feels like an unusual amount of resistance to make them move at all.
I checked the fluid for the hell of it, its full and does not smell of burnt clutch at all.
I am starting to think something is locked up but I don't know enough about an automatic transmission to even guess. Could the converter have went out? Would that even effect it at all?

even if the converter went out it should still roll....does it only not roll backwards? Can you pull the driveshaft to make sure nothing funny is going on with the brakes or rearend?

Dec 11, 2012 | 06:52 AM

#13

Vince B

Moderator

iTrader: (1)

Joined: Sep 2005

Posts: 8,688

Likes: 1

From: Bloomingdale Illinois

I'm going to say that the clutches in the input drum are all welded up. This would cause a tie up in reverse.

Dec 11, 2012 | 07:27 AM

#14

TG02Z71

Thread Starter

TECH Veteran

iTrader: (2)

Joined: Mar 2003

Posts: 4,134

Likes: 0

From: Wisconsin

I'll be pulling the rear drive shaft possibly tonight. I have to so I can at least roll it around. I don't think it the rear brakes as I have never had an issue with them since new but you never know I guess.

Dec 11, 2012 | 07:55 AM

#15

chevrolet all the way

TECH Addict

iTrader: (24)

Joined: Jun 2008

Posts: 2,615

Likes: 0

From: trussville alabama

Vince beat me to it. the forward clutches in the bottom of the input drum i bet are the culprit here.

Dec 23, 2012 | 08:49 PM

#16

BIGDADDY1969

TECH Regular

Joined: Feb 2012

Posts: 411

Likes: 0

From: South Louisiana-With "Swamp People"

Any update on this issue? I just towed my 08 in with the similar problems. Going to start looking for options right now to replace the 4l60e. Not sure if its worth fixing .. im wanting upgrade anyway.. gunna depend on cost to repair it..
Update on yours TG02Z71??

Dec 29, 2012 | 01:37 PM

#17

TG02Z71

Thread Starter

TECH Veteran

iTrader: (2)

Joined: Mar 2003

Posts: 4,134

Likes: 0

From: Wisconsin

No updates other than taking the drive shaft out. Truck rolls now so its not the drive shaft or the rear end.
I have no desire to lay under my truck when its 25 degrees out so its gonna be a long time until I get this

all sorted out.
When I do tear it out and apart I will definitely post pics and finding.
I just bought a new car a week ago that gets 30+ mpg so the truck will be sitting either way.