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

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Old 02-26-2013, 12:05 PM
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2008 Buick Super - 26 k mi, has been in the shop 2 times for tach rising from 2,000 to 2250 during torque converter lockup. Dealer says this is normal, I'm not so sure after reading some of these posts...

I pull my Harley from Indiana to Daytona at leats 1 time per year on a little trailer. I would like to add the trans cooler, any ideas on manufacturer and model that will fit?
Old 03-09-2013, 07:33 PM
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Originally Posted by scrmnvtwins
2008 Buick Super - 26 k mi, has been in the shop 2 times for tach rising from 2,000 to 2250 during torque converter lockup. Dealer says this is normal, I'm not so sure after reading some of these posts...

I pull my Harley from Indiana to Daytona at leats 1 time per year on a little trailer. I would like to add the trans cooler, any ideas on manufacturer and model that will fit?
And that would be your problem...they barely last by themselves....towing is a no no.
Old 04-12-2013, 11:24 PM
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Originally Posted by baltsk8er69
And that would be your problem...they barely last by themselves....towing is a no no.
I would never tow with this car....Not even once!
Old 04-20-2013, 06:25 AM
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Rev and clunk and torque convertor holding o. For too long after ahift into second original trans 113k and counting waiting for it to die so my warranty with the loan covers it
Old 04-20-2013, 07:16 PM
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Originally Posted by SatanBob
Rev and clunk and torque convertor holding o. For too long after ahift into second original trans 113k and counting waiting for it to die so my warranty with the loan covers it
My Monte is doing the same thing, 118k. Gonna order TEP rebuild kit on Monday.
Old 04-20-2013, 09:05 PM
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Oh lol
Old 04-29-2013, 07:11 AM
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Add me to the list
Old 05-15-2013, 07:19 AM
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After being in denial for a while, I had 3 or 4 minor clunks this morning. Too scared to give the car gas now. Add me to the list. under 72k on the odometer.
Old 05-16-2013, 09:14 PM
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Trans blew on the ol' lady's GXP . . . . 85k mile original trans. was HP tunes with DoD tuned out and trans specs tuned @ 40k miles. . . .
Old 06-06-2013, 12:46 PM
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Default Trans shuddering!!!

Recently replace a blown engine. Now have a shudder problem with the transmission. Any advice.
Old 06-11-2013, 02:28 PM
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You can add mine to the list. Literally, stranded me on the way to the tranny shop, DOH!!!
Old 07-03-2013, 10:56 AM
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Can add me to the list as well.

Bought it used and put 60k trouble free miles on it and yesterday morning I had nothing. 118k miles on a giant paperweight. Filling out the info with the NHTSA hopefully get a recall out of it.
Old 07-05-2013, 09:00 AM
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Originally Posted by CubSmurf
Can add me to the list as well.

Bought it used and put 60k trouble free miles on it and yesterday morning I had nothing. 118k miles on a giant paperweight. Filling out the info with the NHTSA hopefully get a recall out of it.
They aren't gonna do anything with that many miles. That's a pretty normal number for any car. Sure it's unlucky but not unheard of.
Old 08-27-2013, 10:38 AM
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Hey, I am new to this forum just signed up. I am on OQCGP.

I had my tranny rebuilt at 82,000KM and it is now at 107,000KM showing issues once again. Add me to the list
Old 10-10-2013, 02:47 PM
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I'm a new user. 102k on stock eng and trans. Just started getting a slow throttle response and a hard delay between 2nd and 3rd when shifting �� sad day
Old 10-19-2013, 09:32 PM
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ok so when im getting up to around 55-60 it shift into 4th and right back to 3rd and back to 4th then its fine till i stop again is this my trans about to **** on me? 08 imp 72k
i really hope not for now but add me to the list
Old 11-21-2013, 05:44 AM
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I am looking at a 2005 GXP with 47,800 miles. Just drove it and love the car. Decided to do research and came across this thread. what's the general opinion, worth the trouble, if there is any or no. I will be buying an aftermarket warranty with this vehicle.
Old 03-07-2014, 11:01 PM
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Good to be back to this forum. I sold my 2001 Camaro SS a few years ago and drove a beater up until recently.

Just bought a 2007 Impala SS with 54k on it in November. But gotta be honest, seeing this thread doesn't make me feel too thrilled.

I did by the Major Guard warranty with the car for 3 yr/36k. I don't drive the car hard (unlike my previous Camaros) so hopefully that will help my cause.
Old 03-08-2014, 01:09 PM
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my daughters 2006 monte carlo ss /now at gm dealer. tranny is gone ! miles on car [140,000] .this is 3d tranny...regular things like brakes/battrey/tires,etc. my impala ss[2008]fine at 43,000 miles. on her monte this tranny has only 19,000 miles...i guess this is bigest problem on our cars. rkvette
Old 03-11-2014, 07:37 PM
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Originally Posted by rkvette
this is 3d tranny
Oh good god man!
This should be a sticky. https://ls1tech.com/forums/ls4-perfo...e-project.html


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