FLT

iTrader: (1)

Both on the 05 and older. In some 06, 07 and all 08 there is an input speed sensor. With that being said I do not know if the vehicle and trans harness will plug in with an added pin in the trans harness side of things in an 05 and later vehicle.

As far as internals I really do not see a big difference in anything that has a M32 rating. Basically the parts are all the same. The only upgraded parts would be billet ones available with the purchase of a FLT transmission!

Due to the fact that I'm a trans builder and not a vehicle specialist, the donor vehicle thing I can not answer. I really don't pay attention. Good luck with the swap. Vince

69Boss302

Thank you for your inout Vince. I really appreciate it. I wish I could bring you some business because I have wanted to get a unit built by FLT but at the moment, it's beyond me.

69Boss302

I found a 4l65e with 31k today. Came out of an 05 GTO. The junkyard confirmed the third digit in the 4 digit code on the trans to be "Z". Which according to an old post I read from Vince indicates a 4l65e. $600 shipped which I don't think is to bad of a price. Although it does need a TC.

Now I need to find out which 2500HD torque converter will work for me. I spoke with Vince about it a long time ago but can't remember that far back. Or I may go with a Yank TT3000.

I might just get this all done within budget afterall.

$1100 shipped for a 24k mileage 07 LQ4
$600 shipped for a 31k mileage 4L65E

FLT

iTrader: (1)

No problem I try to help when and where I can! All I ask is to keep us in mind if you or someone you know is in need of a transmission. Kind words go a long way in my book.

Yes the unit from the 05 GTO is a 65. If your vehicle has a vented yoke you will need to swap a piece off of your old trans that is pressed on the output shaft. All factory 2wd trucks have this. This can be done with a puller of some sort and then just tap it on the new trans using a pipe. Make sure it is snug fit or it will come loose or leak. Also make sure to take a look as to where it is positioned before removing it from your old trans. I hope this helps and makes sense.

As for the converter I think that with the later lq4 engines you will be fine with any ls1 4l60e converter. I know there are a couple different flex plates so make sure to take some measurements with the converter in the trans. Also take a look at the link below.

If you do order a converter from Yank make sure to let them know what you have. They will make sure that your converter is correct for your application.

Here is a link on some info on the engine...
https://ls1tech.com/forums/general-l...tween-two.html

Best of luck with your new combo. Vince

69Boss302

So I could use the torque converter that was used with the GTO (6.0 mated to a 4l65e in a RWD configuration) and be ok, yes?

69Boss302

The trans arrived today but I don't think it is a 4l65e. The sticker on the top has a 4 digit alpha-numeric code of 5HMD. If I have everything straight, then the 3rd digit in this code should be a Z to indicate the 65e trans. Before I bought the trans, I asked the recycler to verify the code for me. They did verify it as having a Z, which it does not.

The code etched on the bottom under the tailshaft is 5HMD 110A 41486992.
The vehicle VIN is 6G2VX12U85L464965









The engine arrives tomorrow. Let's hope that it is much cleaner and everything is as they said it would be.

bullygoat

If the VIN is correct, that is a 4L65E transmission out of a 2005 GTO. If this is going in your truck, the tailshaft is going to have to be changed out.

69Boss302

What I need to do is verify that the trans actually matches the VIN that they gave me. It is a 2005 trans for sure but I want to make sure that it is a 65E.
According to Vince at FLT, that 4HMD code should have a Z as its 3rd digit. That signifies it's a 65E.


EDIT: According to GM, the casting number on the trans matches th GTO's VIN.

69Boss302

Ordered a Circle D TC the other day. That should arrive the end of next week. Thanks Chris.

I'll give the trans a better look today to make sure all seems well. Assuming that it's good, the 4l65e will be going in when the torque converter comes in.

FLT

iTrader: (1)

You probably read an old post from me before I knew better! All 05 and later GTO units have 5 pinion planets in them so it is a 65! I'll have to do a bit of research to better answer questions like this in the future. Vince