LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super
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LS4 Transmission Problem Thread (4T65-HD); Current Total Inside

Old Aug 24, 2011 | 04:17 PM
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Not good news for you guys....what a bunch of greedy, incompetent m#$%^$f#**rs!

http://www.reuters.com/article/2011/...77I0Z820110819
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Old Aug 24, 2011 | 07:15 PM
  #302  
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Originally Posted by jamespq1
At 80,000 With minimal warning tranny goes completely out ( No Engine Light). Dealer replaced with new tranny not rebuilt. Cause was Torque Converter in pieces. Now, at 104,000 Chirping sound from tranny and frequent but mild slips. But goes and engages into every gear fine. Just while driving steady is when i feel the miss or brief slip. Tranny again? Please tell me i'm wrong!
Added you to the list.
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Old Aug 27, 2011 | 12:31 PM
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I don't know if this counts. I have an appointment at the Chevy dealer where I work to check it out next week. Been experiencing a huge shift flare on the 3-4 shift. Partial throttle it will run to about 2000 rpms then on the shift will flare out to 2500 then engage AFM I assume and rpms will drop about 100-200 rpms. Also under partial throttle conditions on the 1-2 shift if you roll to about half throttle close to the shift point there is a hard engagement into 2nd.
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Old Aug 29, 2011 | 12:47 PM
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Originally Posted by Hanen42
I don't know if this counts. I have an appointment at the Chevy dealer where I work to check it out next week. Been experiencing a huge shift flare on the 3-4 shift. Partial throttle it will run to about 2000 rpms then on the shift will flare out to 2500 then engage AFM I assume and rpms will drop about 100-200 rpms. Also under partial throttle conditions on the 1-2 shift if you roll to about half throttle close to the shift point there is a hard engagement into 2nd.
Any kind of flare is generally the trans. I'll add you to the list, but please keep us updated!
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Old Sep 14, 2011 | 05:59 PM
  #305  
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Tranny gone! It won't pull in any gear! Something snapped while doing some testing(aggressive driving) last Saturday. Taking it in next week for a complete rebuild using TEP upgrade parts. Thanks Dave!
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Old Sep 21, 2011 | 05:49 PM
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Originally Posted by 07MCSS
Tranny gone! It won't pull in any gear! Something snapped while doing some testing(aggressive driving) last Saturday. Taking it in next week for a complete rebuild using TEP upgrade parts. Thanks Dave!
Added you and bigboy3l to the list.

Dave @ TEP RULES!
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Old Sep 22, 2011 | 11:30 AM
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Trans Woes... ouch. For any auto to last 100K is a plus.
I just hit 60K and I'm thinking... How much longer will it last? I have a complete TEP trans kit with gears and converter on my work bench. I would like to pull the trans myself and install the new clutches, bands, valve body, gears and converter sometime soon. I need to figure out how to pull the craddle and trans. I know I need a engine support fixture. My next investment will be a service manual.

This thread sucks.. It's scarry and cancerious.
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Old Sep 22, 2011 | 01:28 PM
  #308  
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Originally Posted by DavidGXP
Trans Woes... ouch. For any auto to last 100K is a plus...
I guess it's another one of those "they don't make 'em like they used to" situations.

For me, this is only the second car out the 24 or so with automatics that I've owned that ever had a trans problem. And I drove a few of those others beyond 100k miles. Hell, I just replaced the trans in the Grand National after putting 162,000 miles on the un-opened stocker. And some of those miles were done a quarter at a time, with 25+ lbs of boost.

Stuff just isn't made to last these days.

Last edited by LS1 Racing; Sep 22, 2011 at 06:15 PM.
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Old Sep 22, 2011 | 05:57 PM
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Originally Posted by LS1 Racing
I guess it's another one of those "they don't make 'em like they used to" situations.

For me, this is only the second car out the 24 or so with automatics that I've owned that ever had a trans problem. And drive a few of those others beyond 100k miles. Hell, I just put trans in the Grand National after putting 162,000 miles on the un-opened stocker. And some of those miles were done a quarter at a time, with 25+ lbs of boost.

Stuff just isn't made to last these days.
Very true.. Man I wish I could have bought that GN. The couple left state so it's long gone

My trans works cause I don't let it lug. I'll step on it, or drop it down a gear if it starts too. Also, I have flushed the fluid twice and changed the filter.
I don't trust it.. and I feel for you guy's.
I bounced off of the limiter yesterday at 6800rpm and it grabbed 2nd just as I let off, and stepped on it again, so the tires and trans went bang/chirp.

Upgrading the motor mount really makes the trans extra snappy!

This trans reminds me of the Th350's. I have blown 4 of those SOB's in weak 180 flywheel hp rated engines.
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Old Sep 22, 2011 | 06:01 PM
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stuff today is only made to use/abuse then dump a few years later
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Old Sep 22, 2011 | 06:19 PM
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Originally Posted by DavidGXP
Very true.. Man I wish I could have bought that GN. The couple left state so it's long gone
Mine's for sale, if you're interested.

Originally Posted by DavidGXP
This trans reminds me of the Th350's. I have blown 4 of those SOB's in weak 180 flywheel hp rated engines.
Had a few of those but never broke one. The only other trans I had problems with the 4T80-E in the Aurora I had. First time, it just locked itself into 2nd gear and stayed there...At 80 MPH on the freeway. That resulted in the motor spinning #6 and #7 rod bearings. Warranty company put a used replacement trans in it, which wiped out the differential gear bearings less than 10,000 miles later. The car was traded for a brand new 2000 Z28 shortly thereafter.

I should have learned that V8s and FWD don't mix, but I had to do it all over again with the Impala. Sucks.
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Old Sep 27, 2011 | 02:55 AM
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Originally Posted by LS1 Racing
Mine's for sale, if you're interested.
I would love... to buy it, but I'm sure it's out of my range
Why are you selling it? Are you Crazy?

Originally Posted by LS1 Racing
I should have learned that V8s and FWD don't mix, but I had to do it all over again with the Impala. Sucks.
I know what you mean. Even though I love my GXP, I should have kept my 04Ranger and bought a Vette.

Last edited by DavidGXP; Sep 27, 2011 at 04:53 AM.
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Old Sep 27, 2011 | 03:50 AM
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Originally Posted by chaman
Not good news for you guys....what a bunch of greedy, incompetent m#$%^$f#**rs!

http://www.reuters.com/article/2011/...77I0Z820110819
Haven't been in here in a while... That's messed up.
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Old Sep 28, 2011 | 10:26 PM
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My trans has been.....






































AWSOME,glad I went and had it built up for power.Now I just need the cash for more power
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Old Sep 30, 2011 | 09:32 AM
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Brought my Super in to a local dealer to have them look at why the vehicle has a delayed engagement. Figured they would know best if there was a fix before I caused damage. To my surprise I have a powertrain warranty until August 2013.

The transmission acted up for them and they removed it. They went through and replaced the input and 3rd clutches, full gasket kit, valve solenoid, all seals and a piston. The seals had gone bad which was causing the delayed engagement. Cost, $0.00. I'll be sure to let you guys know how it feels in time, only got to drive it home last night. (20 miles) Rebuilt trans at 81,065. I'm glad that it is fixed because I do not want to get a new car, I enjoy the Super too much!
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Old Sep 30, 2011 | 11:25 AM
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Originally Posted by Boattail455
Brought my Super in to a local dealer to have them look at why the vehicle has a delayed engagement. Figured they would know best if there was a fix before I caused damage. To my surprise I have a powertrain warranty until August 2013.

The transmission acted up for them and they removed it. They went through and replaced the input and 3rd clutches, full gasket kit, valve solenoid, all seals and a piston. The seals had gone bad which was causing the delayed engagement. Cost, $0.00. I'll be sure to let you guys know how it feels in time, only got to drive it home last night. (20 miles) Rebuilt trans at 81,065. I'm glad that it is fixed because I do not want to get a new car, I enjoy the Super too much!
Added you to the list. Hopefully they redesigned the valve solenoid so you won't have these problems again.
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Old Sep 30, 2011 | 12:36 PM
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Might as well add me to the list. Had the lurching from a stop transmission issues and had it rebuilt from the dealership about 5.000 miles ago. This is quite a list!

Last edited by SS07; Apr 25, 2012 at 02:33 PM.
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Old Oct 4, 2011 | 03:56 PM
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Originally Posted by SS07
Might as well add me to the list. Had the lurching from a stop transmission issues and had it rebuilt from the dealership about 5.000 miles ago. Just recently took it back in cause of rougher than normal downshifting to 1st but still driving it to see if it gets worse. This is quite a list!
You're already on it!

Added DavidGXP, too.
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Old Oct 4, 2011 | 05:34 PM
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Originally Posted by LS1 Racing

Added DavidGXP, too.
Tail between legs!
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Old Oct 10, 2011 | 01:35 PM
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I have blown at least one input shaft and maybe a 300m shaft too. Since I'm runnng Kevins turbo I'm not sure if I should go on the list. I'm definitely putting more power to it than was intended.
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