Dif and Tcase fluid change

[f5fstop]

Originally Posted by fourfourto

F5 my vin is 136668.
Do i need extra oil now or just when I change it?
Also recomended change would be at 50k is that correct?

Vehicles after 5GTDN136968105387 do not require the extra fluid, so with your VIN the extra fluid is not required. Recommended by GM is 50K using Dexron III.
You can verify this by looking at the bottom of the t/case. If there is a blue dot on the case, extra fluid is not required.

[fourfourto]

Vehicles after 5GTDN136968105387 do not require the extra fluid, so with your VIN the extra fluid is not required.


Isnt 136668111776 before 136968105387
Im confused

[Hal]

I thought I was corn-fused as well.

My vin is DN136368... Jan 2006 build, 5-speed adventure/lux pkg.
So it's before the 136968, yes, ok, so extra fluid required right?

Go get under your t-case, here's what I found...
A blue line (like from a marking pen) not a dot. Also two printed labels. One idiot-proof label gives the detailed filling instructions in english and spanish including the part about adding additional .25L thru the speed sensor hole. The other label identifies the T-case: 449, 12/21/05, 14:14, 60 EV C012063.

So which thingee is the speed sensor? the one to the rear drivers side almost on top of the T-case?

?

[fourfourto]

mine was a June 05 build.
Maybe there only going by last 8 digits.?

[usetosellhummer]

120 from my guy and he uses the GM dex sheet. Ok I will wait a bit.

[f5fstop]

Originally Posted by usetosellhummer

120 from my guy and he uses the GM dex sheet. Ok I will wait a bit.

Ok, I was referencing the last six digits of the VIN number, this is the sequence of the VIN number, the other digits stand for other things.

As for the fill, I was assured by engineering that the problem with the extra fill was fixed on vehicles built after the VIN, evidently it wasn't if there is a permanent sticker on the t/case stating to add more fluid via the speed sensor hole. MY MISTAKE. My APOLIGIES to Garnerbiker. Guess I can't believe everything I'm being told by certain people at GM.
Now I'm curious to see if they fixed this for 2007. Guess I'll have to crawl under a 2007, if we have one left in the center, and see for myself. This PEES me off, and the service manual is incorrect.
The procedure to fill the t/case in the service manual implies that the extra fluid is NOT required. So, if there is a sticker stating to add extra, then I have to notify someone that the service procedure is incorrect.
See, as I have stated many times, I learn from you guys and gals.


VIN BREAKDOWN for HUMMER H3 using 5GTDN136968105387:
5 - Country of Origin 1, 4 5 = USA)
G - Manufacturer (G = General Motors)
T - Division (R, T = Hummer)
D - GVWR/Brake System
N1 - Line Chassis/Series (Mid Size 4x4 SUV - 1/2 Ton - H3)
3 - Body Type (3 = Four Door Utility Truck)
6 - Engine Type (6 = L52, 3.5L L5, MFI)
9 - Check Digit (random)
6 = Model Year (6 = 2006)
8 = Manufacturing Plant (8 = Shreveport, LA)
105387 - Production Sequence Number

[Hal]

Originally Posted by fourfourto

Vehicles after 5GTDN136968105387 do not require the extra fluid, so with your VIN the extra fluid is not required.


Isnt 136668111776 before 136968105387
Im confused

It's all clear as mud isn't it?

136968105387 (vehicles after this do not require extra fluid per f5fstop)
136668111776 (fourfourto's vin & f5fstop said does NOT require, June 05)
136368237108 (mine does require extra fluid per T-case sticker, Jan 06)

[fourfourto]

I thought it was clear for a second.?
How can Hal have a sticker if hes after that # ?

[Hal]

f5fstop, I just now saw your last post....

maybe someone does knows that the manual is wrong and hence the idoit proof sticker on my T-case.
Anyway thanks for checking on this. We all value your expertice more than you know!

[garnerbiker]

f5fstop,

Thanks for getting the extra fluid info striaght. That is what I did when I filled it up.

Was adding the extra fluid an afterthought by GM, or could they not get the fill plug up higher?

G

[f5fstop]

Maybe I'm adding confusion to this subject.

Apparently, I was informed wrong when the dealer upgrade bulletin was issued, that the additional fluid would not be required on vehicles after the VIN I posted. It appears the additional fluid is required, but rather than issue a bulletin, there is a note added to the t/case informing the tech to add the additional fluid.
So, it appears that all t/cases, at least in 2006, require the extra fluid. I will check on this tomorrow with engineering.

HAL: As for the manual, the electronic manual I access online is updated daily with new or revised information. For the engineer to update the information is very easy, put in a request, and a day or two later it is available to the dealers via the GM electronic service information website.
If I find out tomorrow that all cases required the extra fluid, I will notify the people in charge of service manuals and have them make the change to the fill procedure.

[Desert Dan]

Thanks f5fstop

A good reason not to get it done a quickie oil change place. Not to mention any names..