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LS4 Transmission Problem Thread (4T65-HD); Current Total Inside

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Old 04-26-2016, 01:29 PM
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LS4 Transmission Problem Thread (4T65-HD); Current Total Inside

 
Old 01-08-2011, 09:15 AM
  #81  
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Dont forget me!

Mine when its cold does the Reverse to D clunk. and overdrive slipping when cold. Or just slipping in any gear "sometimes" (dealer cannot replicate) lol. So, yeah add me. Im sure ill be in the blown/replaced list soon..
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Old 01-08-2011, 01:04 PM
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Originally Posted by 98GTcoupe View Post
Dont forget me!

Mine when its cold does the Reverse to D clunk. and overdrive slipping when cold. Or just slipping in any gear "sometimes" (dealer cannot replicate) lol. So, yeah add me. Im sure ill be in the blown/replaced list soon..
Added you!
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Old 01-11-2011, 04:02 PM
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Added Ran-Dom32 to the trans failure list. We're up to 99 users with current or past transmission problems.
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Old 01-12-2011, 12:49 AM
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actually just checked and im not on there. so if you could add me to the list. gave out at 67k been rebuilt about 12 months now
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Old 01-12-2011, 11:56 AM
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Originally Posted by blakss View Post
actually just checked and im not on there. so if you could add me to the list. gave out at 67k been rebuilt about 12 months now
Added you...You're lucky #100!
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Old 01-13-2011, 07:29 AM
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Might as well tag on my broham dewd87 he had his replaced
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Old 01-13-2011, 03:27 PM
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Originally Posted by vroom_vroom View Post
Might as well tag on my broham dewd87 he had his replaced
Added dewd87 to the list and updated the total.
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Old 01-13-2011, 08:25 PM
  #88  
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you can also go ahead and add me for the original tranny slipping
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Old 01-13-2011, 08:53 PM
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Originally Posted by 07MCSS View Post
Add me to the second list. Mine is making noises and it's throwing codes. I'm taking it in next week.
Ok, take me off the list. Noises were not tranny related according to the dealer. They even applauded my efforts with the turbo setup. They are a dealer for Mast Motorsports engines and will install one in just about anything so they have some understanding about performance mods. The culprit is my down pipe rubbing against the firewall and the codes were from a tire pressure sensor. It never had any shifting issues. I guess it was just my paranoia. I don't dog the car. It is my only transportation. I am runnning 10.5 psi with the turbo setup now which should have me well above the 400 fwhp mark with no other issues. Yipppppeeee!
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Old 01-13-2011, 11:01 PM
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Originally Posted by why_so_serious View Post
you can also go ahead and add me for the original tranny slipping
Added you to the list.

Originally Posted by 07MCSS View Post
Ok, take me off the list. Noises were not tranny related according to the dealer. They even applauded my efforts with the turbo setup. They are a dealer for Mast Motorsports engines and will install one in just about anything so they have some understanding about performance mods. The culprit is my down pipe rubbing against the firewall and the codes were from a tire pressure sensor. It never had any shifting issues. I guess it was just my paranoia. I don't dog the car. It is my only transportation. I am runnning 10.5 psi with the turbo setup now which should have me well above the 400 fwhp mark with no other issues. Yipppppeeee!
That's great news!

I removed you from the list.
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Old 01-13-2011, 11:22 PM
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Originally Posted by LS1 Racing View Post
Added you...You're lucky #100!
lucky me!
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Old 01-16-2011, 11:54 PM
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*Knock on wood and crossing my fingers it stays this way*

No problems yet, purchased the car on 11/10/2010 with 52,000 miles on it. Had the trans get up to the 190 range on the couple of 70 degree days we were lucky to have in november, never gets above 140-160 right now but its winter. Only driven just over 2K in that time, everything seems cool as far as I can tell. I wonder if the previous owner got pissed off and traded it in after a trans failure and rebuild? It seems a lot of people don't make it far beyond the 60K mark from what I've read. If so, that'd be fantastic for me, but I have no way of knowing really.

Definitely plan on doing a cooler in the spring and I saw somebody makes a deep, finned trans pan with a drain plug. It was kind of expensive but I don't mind if it prolongs the life of a part of the car it is VERY inconvenient to do major service on.

I've got 2 years and 24K of aftermarket warranty on the car so if something happens, hope its during that time.
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Old 01-17-2011, 12:14 AM
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@sohc96, thanks for posting your experience.

Hopefully, you'll be one of the lucky ones.

One way to know if you have a factory remanufactured trans is there will most likely be a sticker or ink stamp on the casing that says "Inspected." There's probably no way of knowing if you have a non-factory unit or rebuild.

I do recommend a cooler, however, heat is not the primary trans killer in our application, but rather a design and engineering flaw.

For more details, you may want to do a search for my "Transmission Upgrade Thread."
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Old 01-17-2011, 02:41 PM
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got mine back today (3rd trans in my GXP) 1700 dollars later , trans temp runs @ 178 is that normal? I have a 1 year warranty, & that's longer then I plan to keep the car, I'm going to drive it like I stole it
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Old 01-17-2011, 07:42 PM
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178 sounds about right
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Old 01-17-2011, 08:54 PM
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Originally Posted by Ran-Dom32 View Post
got mine back today (3rd trans in my GXP) 1700 dollars later , trans temp runs @ 178 is that normal? I have a 1 year warranty, & that's longer then I plan to keep the car, I'm going to drive it like I stole it
Under what conditions did you see 178? Was that the highest temp you saw? What was the outside temperature? Was this primarily city or highway driving? Any long up-hill or down-hill grades? How long where you out driving before you saw that temp? Do you have a trans cooler?

Sorry for the interrogation, but knowing that stuff will give us a good indication of whether that's a normal temp or not.
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Old 01-18-2011, 09:39 AM
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The outside temp was around 32, normal driving conditions, I did let it idle in my driveway for quite a while & it went up to 195
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Old 01-18-2011, 10:46 AM
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Originally Posted by Ran-Dom32 View Post
The outside temp was around 32, normal driving conditions, I did let it idle in my driveway for quite a while & it went up to 195
Do you have a trans cooler?
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Old 01-18-2011, 10:59 AM
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no, I inquired about adding a cooler, but the tranny guy said is was useless, he's the one warrenting the tranny
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Old 01-18-2011, 11:04 AM
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Originally Posted by Ran-Dom32 View Post
no, I inquired about adding a cooler, but the tranny guy said is was useless, he's the one warrenting the tranny
I disagree with him on the cooler. It may not solve our common problems but low trans temperatures are better than higher ones, 100 times out of 100!

I don't think the temps you're seeing are abnormal, considering the driving condtions and outside temp. I would definitely get a cooler on it. You'll see your average temps drop by about 10 degrees, and you might see a lower max of half that.
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