H3 Transmission Pan question & fluid question

[Airborne]

This is pretty sweet guy, I highly recommend swapping out your fluid for redline fluids , I am now making 15mpg, before changing fluid i was making 13.5-13.9mpg . My hummer is an 07 h3 with the 3.7 i5.

That looks perfect. When can you do mine?

Really though.. which fluids did you switch out I would love for an MPG increase. Any thing besides just the trans fluid?

 

[rollerlocked]

Utah to North carolina would be a long drive for you to come get it done. The fluids I used were redline 75/90 gear oil (pn 57904) for front and rear differential . For the transfer case I used redline heavy shock proof (pn 58204) , and I changed 5 quarts of ac delco 88861037 into the transmission, got another 5 to go in during my next maintenance, during engine oil change. Oh, almost forgot I put a new transmission filter in I used a duralast filter from autozone.
Ill update more after I put more mileage on it, but on my cars logger ++ app on the android, my prior steady was 13.1-14.0 mpg and after the fluid change I have been only getting better 14.5-15.9 mpg. My best tank yet has been 15.9 mpg im hoping freeing up more mpg with custom intake, custom exhaust , and the electric cooling fan setup from pcmsofnc, we will see...

 

[MaxPF]

You used heavy shockproof in your transfer case?!?! You realize that stuff is way too thick for the internal oil pump and you will likely destroy your case, right?

 

[4speedfunk]

You realize that stuff is way too thick for the internal oil pump and you will likely destroy your case, right?

X2! The H3 t-case is filled with special "magical mystery parts". I would never run anything but what GM suggests (determining that in itself is a challenge). They give a fluid part number, and some guys say, "That has been superseded by DEX-VI". Other guys say "No-way...run earlier DEX". Other guys say "No...run stick-shift fluid". Other guys say..."No, you must run #88861800". Blah blah blah...opinions are everywhere. I just went through all this when I replaced my t-case. I was able to side-step the debate because the t-case already came pre-filled with the mystery fluid. So for now...I assume I'm running the correct fluid. To this day, I still have no idea what fluid to run in the H3 t-case. All I know is #88861800 is correct for a 2008 model...but, I don't know what the over-the-counter equivalent fluid is.

I think the best any of us can do is to use DEX-VI. That is an educated guess...and not from any written source. GM loves to spec part numbers for fluids, rather than simply telling us WTF fluid to use.

 

[Big Mike]

With this being my first GM I can't say I am overly impressed with the way they do a lot of things... :roll:

guess I got spoiled with German engineering.. :corn:

 

[rascole]

With this being my first GM I can't say I am overly impressed with the way they do a lot of things... :roll:

guess I got spoiled with German engineering.. :corn:

Sorry to bust your bubble Big Mike, H3 TC is a BorgWarner, BW is the main supplier for BMW, VW, Daimler, & most other automakers. They also have a large engineering facility in China, like most others. The days of saying one company has better engineering are long gone. Our cars are like computers, pieced together from multiple parts from multiple companies that use even more engineering companies. Come on, they even hire outside companies to design their cars sometimes. There are so many "joint ventures" out there it will make your head spin.

 

[Airborne]

Utah to North carolina would be a long drive for you to come get it done. The fluids I used were redline 75/90 gear oil (pn 57904) for front and rear differential . For the transfer case I used redline heavy shock proof (pn 58204) , and I changed 5 quarts of ac delco 88861037 into the transmission, got another 5 to go in during my next maintenance, during engine oil change. Oh, almost forgot I put a new transmission filter in I used a duralast filter from autozone.
Ill update more after I put more mileage on it, but on my cars logger ++ app on the android, my prior steady was 13.1-14.0 mpg and after the fluid change I have been only getting better 14.5-15.9 mpg. My best tank yet has been 15.9 mpg im hoping freeing up more mpg with custom intake, custom exhaust , and the electric cooling fan setup from pcmsofnc, we will see...

Ok thanks I will give them a shot. I am in line to change everything this week before I head to moab. I am going to use redline where ever I can. I have used amsoil in the crankcase and it has worked very well for me but we are going to give the redline a try this time.
As far as freeing up more MPG the Efan will give you the most bang for the buck. The tune will give you a little but it will make the truck soooo much better to drive. Exhaust and you might lose a little mpg but gain a little in performance and a lot in sounding better.

 

[MaxPF]

X2! The H3 t-case is filled with special "magical mystery parts". I would never run anything but what GM suggests (determining that in itself is a challenge). They give a fluid part number, and some guys say, "That has been superseded by DEX-VI". Other guys say "No-way...run earlier DEX". Other guys say "No...run stick-shift fluid". Other guys say..."No, you must run #88861800". Blah blah blah...opinions are everywhere. I just went through all this when I replaced my t-case. I was able to side-step the debate because the t-case already came pre-filled with the mystery fluid. So for now...I assume I'm running the correct fluid. To this day, I still have no idea what fluid to run in the H3 t-case. All I know is #88861800 is correct for a 2008 model...but, I don't know what the over-the-counter equivalent fluid is.

I think the best any of us can do is to use DEX-VI. That is an educated guess...and not from any written source. GM loves to spec part numbers for fluids, rather than simply telling us WTF fluid to use.

I bet the reason they spec the MT&TC fluid is because the viscosity of Dex VI is too low.

 

[06 H3]

I ran manual trans fluid in last time because they told me too this time I was told to use dex 6. So far neither fluids have exploded my t case

 

[rollerlocked]

My 2007 manual states manual transmission fluid GM part No. U.S. 88861800 in canada 88861801 , and the internet debates I read were all over the place . But I can tell so far I have an increase in gas mileage I will update you guys about longevity as time passes.
If I grenade it I will pioneer 2wd/4wd transfercase swap, if I don't we can add this to a list of recommended fluids due to increase MPG.

 

[Big Mike]

Sorry to bust your bubble Big Mike, H3 TC is a BorgWarner, BW is the main supplier for BMW, VW, Daimler, & most other automakers. They also have a large engineering facility in China, like most others. The days of saying one company has better engineering are long gone. Our cars are like computers, pieced together from multiple parts from multiple companies that use even more engineering companies. Come on, they even hire outside companies to design their cars sometimes. There are so many "joint ventures" out there it will make your head spin.

Don't worry about my bubble there numb nut..

This Government Motors H3 POS is nowhere near the quality of any German vehicle I've ever owned, there is a difference and its a big one..

 

[MaxPF]

You ever worked on one? If you had you would want to take German engineering and stick it up some German's ass. Just sayin....

 

[zefrum]

Why not use a fluid evacuator like 'Mityvac 7300 PneumatiVac Air-Operated Fluid Evacuator' (on amazon) to draw the transmission fluid up through the dipstick?

-I have a 10gallon 125psi harbor freight air compressor.

 

[Best4x4]

I owned several Rover's during their partnership with BMW and they were far from perfect in fact the BMW/Rover era was a pita!! German electronics that were extremely sensitive, and their engine management system was retarded vs Rover's previous GEMS setup. I've had friends with German VW's, Mercedes, and BMW's and while they drove great (when they worked) all my friends eventually got rid of them due to poor electronics and constant issues.

I've owned American, Japanese, British, and British/German stuff, and the H3 honestly is very easy to maintain, service, and work on. I've had a few parts wear out but nothing major. Ride quality is good, fit/finish is good, and the electronics are a breeze vs German stuff. Since owning my H3's I've spent more time in them vs under them. Something I can't say about any of my Jeeps..

Maybe u got someone's used and abused H3, but overall the H3 has been a well designed rig vs other SUV's of it's kind out there.

My H3 hasn't ever shifted out of park like some older Audi's or caught on fire like the R8 with a V10 just saying...

I'd like to run RP in my transmission, but it isn't compatible with Dex VI.

 

[zefrum]

Repost because I dont think anyone saw my question ha ha-

Why not use a fluid evacuator on the Transmission like 'Mityvac 7300 PneumatiVac Air-Operated Fluid Evacuator' (on amazon) to draw ALL the transmission fluid up through the dipstick?

-I have a 10gallon 125psi harbor freight air compressor...

 

[derian06]

Don't worry about my bubble there numb nut..

This Government Motors H3 POS is nowhere near the quality of any German vehicle I've ever owned, there is a difference and its a big one..

Come to a hummer forum and talk **** about an H3. Good luck here bud...

 

[rollerlocked]

Resurrection of an old thread

Here is an Update , I'm about to roll onto the 1 year mark, and I will be doing drive line maintenance again soon , I did not have any issues using redline fluid.

date 03-29-14 mileage 112,420
replaced front and rear differential redline 75/90 gear oil (pn 57904)
transfer case redline heavy shock proof (pn 58204)
5 quarts of ac delco 88861037 into the transmission

~installed a weld-on Magnaflow muffler~ (should've got a flowmaster)

~at least 7 engine oil and filter changes changes~

~replaced 2 door jamp switches part number S41054~

~replaced rims the factory 18's with factory 16's and downsized tires from 285/65/18 to 265/75/15~

date 03-29-14 mileage 128,729
over the last year my worst gas mileage was 14.07mpg & best mileage was 16.30mpg .

 

[Cyouincourt007]

Thanks for the update buddy.

 

[MaxPF]

Resurrection of an old thread

Here is an Update , I'm about to roll onto the 1 year mark, and I will be doing drive line maintenance again soon , I did not have any issues using redline fluid.

date 03-29-14 mileage 112,420
replaced front and rear differential redline 75/90 gear oil (pn 57904)
transfer case redline heavy shock proof (pn 58204)

You should not be using that fluid in your t-case. The viscosity is far too high.