Hummer H3 Alpha 2008 remanufactured Valve Body discontinued..2009 Alpha's applicable?

[Guerrero]

Hello All!!

Well this is disgusting, I bought a 2008 Hummer H3 alpha, and I am almost refurbishing it, I am going to start a Build thread about this one....but in part of my refubishing plan on Hummers....there is always the plan of refurbish all the hydraulical system in the 4l60e. Found that all the problems with our trannys start with a line pressure problem. So if you refurbish valve body, separator plate, accumulators, pistons, springs, gasket and put a sonnax 4l60e-lb2 booster valve, with a tranny cooler and lucas oil additive....this trannys becomes super strong (talking about hydraulic and pressure).

Please help me with this, and not try to change my mind about my project, its my understanding about these trucks after lot of years with them with desert heat, driving and a lot of miles of hard driving the transmission

So, ok, here comes the problem:

2008 Hummer H3 alphas have a Valve body part number #19209029, this part number was discontinued some months ago mad, so I started investigating (because there is no part that sustitute it) and 2009 Hummer H3 alphas have part number avaliable #24237219, this part seems exactly identical than 2008 H3 alphas, and in this website:

https://nemigaparts.com/cat_spares/epc/hummer/hm3-n/04/tx04-433/

You can check that Part Number #24237219 is listed for Lh8 engines and lh9 engines....and part number #19209029 is listed as ''not for sell where imports are restricted''

So...if I buy part number #24237219 from Hummer H3 alpha 2009, is going to be ok for my 2008 Hummer H3 alpha?

This is frustrating....thanks for anyone that help me out!


P.d: Here is a advancement of the build thread:

One month ago the engine bay looked like this:



(I removed a GPL system that have the previous owner here in Europe)



And this is how looked like two days ago:





Lots of work and details, lot of new parts (engine mounts, balancer, valve covers, intake manifold, water pump, pulleys, belts, spark plug, wires......) and a lot of time refurbishing parts (I removed completely all the engine harness and refurbish it!)

Right now I am installing JBA shorty headers (had to be adapted) and three efans, one pusher and dual pullers, along with a external tranny cooler)

Thanks for your help!

 

[jimmy p]

I will have to verify but I think the wiring strategy changed from 08 to 09. I forget what changed internally to go along with it.

Sent from my SM-G960U using Tapatalk

 

[Gpcalero]

Build is coming along quite nicely Oscar! Engine bay is looking very clean :thumbs:

 

[deserth3]

Don't know if this place can help. They do a lot of YouTube videos
Precision Transmission - YouTube

 

[JPaul]

A tip for replacing those heater hose lines you cut, you can cut the aluminum crimp tube off them and get the old rubber hose off and then replace them with new hose. Instead of using clamps I went with the Gates Powergrip heat shrinkable hose clamps. I was a bit skeptical at first but have been pleased with the results. It ends up with a really clean looking repair and I have had zero issues with leaks and it's been at least a couple years now. I would also suggest replacing the quick disconnect hose ends as well with new ones.

You can see them in this shot:

New hose ends (needs 1 of each, they're used in numerous other GM vehicles so should be easy to procure over there):

https://www.rockauto.com/en/moreinfo.php?pk=100100&cc=1441261&pt=6876
https://www.rockauto.com/en/moreinfo.php?pk=100098&cc=1441261&pt=6876

Part numbers for the Gates Powergrip clamps (need 2 of each):
GATES 32925
GATES 32929

These are the clamps I used for the radiator hoses:
GATES 32728

 

[JPaul]

More info in my build thread here about when I redid those lines whilst replacing the water pump: https://www.hummer4x4offroad.com/fo...-s-Alpha-build?p=236152&viewfull=1#post236152

 

[Guerrero]

GATES 32929A tip for replacing those heater hose lines you cut, you can cut the aluminum crimp tube off them and get the old rubber hose off and then replace them with new hose. Instead of using clamps I went with the Gates Powergrip heat shrinkable hose clamps. I was a bit skeptical at first but have been pleased with the results. It ends up with a really clean looking repair and I have had zero issues with leaks and it's been at least a couple years now. I would also suggest replacing the quick disconnect hose ends as well with new ones.

You can see them in this shot:

New hose ends (needs 1 of each, they're used in numerous other GM vehicles so should be easy to procure over there):

https://www.rockauto.com/en/moreinfo.php?pk=100100&cc=1441261&pt=6876
https://www.rockauto.com/en/moreinfo.php?pk=100098&cc=1441261&pt=6876

Part numbers for the Gates Powergrip clamps (need 2 of each):
GATES 32925
GATES 32929

These are the clamps I used for the radiator hoses:
GATES 32728

Thank you so much JPaul!!! super interesting information, I will consider it

 

[Guerrero]

Well after a lot of investigation, part number #24237219 of 2009 Hummer H3 alphas is not applicable to 2008 Hummer H3 alphas with lh8 engine code. General motors change some internal in the transmission in 2009 and the Valve Body of the 2009 H3 alphas doesnt have manifold pressure switch, so Valve body are differents in those..

Another thing that I am investigating is about compatibility between Hummer H3 alpha 2008 Valve body #19209029 (being discontinued) and Hummer H3 2008 i5 Valve body #19209028, I searched a lot, comparing part numbers of everything and the two cases (from i5 to v8) are same part number...(without internals, only case), all solenoids are the exact part number, everything is exactly the same, except the part number of valve body itself and separator plate. Alpha separator plate #24241785 and i5 separator plate #24241784 (BUT! both plates looks exactly the same, looking at both very carefully there isnt difference, I imagine that the difference could be in some hole diameters)

So I am considering buying a #19209028 remanufactured valve body with the alpha separator plate that is not discontinued #24241785...so here arise next questions for those with swap to v8

Do you have any problem using the wiring, electronics, engine and everything from an alpha but still using transmission case and valve body from a i5?

This could be very interesting considering that 2008 Alpha's valve body is discontinued and maybe the remanufactured valve body from a i5 could be compatible