Drivetrain jerk

[Dave LV]

OK, so my windshield noise and driver side rattling are on this board.

How about has anyone noticed the drivetrain jerking once when slowing down from highway speeds, kinda like the center differential finally unlocking.

[wannabeH3]

yes, i get it when slowing down then getting on the gas again... i figure its normal....

[RubHer Yellow Ducky]

Have 2 H-3's.

One has same as you described, the other shows no problem. Have around 3000 miles on it and taken it up to around 85 mph a few times so from school zones to 85 experience no jerking. I use CRUISE whenever possible so would notice it...

RYD

[Hummer crazy]

yes I have it Too guess its just a trait of the H3,( lest i hope)

[Mike E]

I get the same jerk. I figured it was a normal response in the auto trans.

[phantom2]

Same situation here...

I sometimes get a bit of it, feels like a bit of driveline lash. But it's a truck not a car.

S.

[ChevyHighPerformance]

Does it feel like the torque converter is unlocking?

[HummBebe]

Originally posted by wannabeH3:
yes, i get it when slowing down then getting on the gas again... i figure its normal....

Honest, I did not have this issue before I had my 15000 mile trnsmission service. Now it makes me crazy. Is this possible??

[1COOLH3]

Originally posted by HummBebe:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by wannabeH3:
yes, i get it when slowing down then getting on the gas again... i figure its normal....

Honest, I did not have this issue before I had my 15000 mile trnsmission service. Now it makes me crazy. Is this possible?? </div></BLOCKQUOTE>

[1COOLH3]

Originally posted by HummBebe:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by wannabeH3:
yes, i get it when slowing down then getting on the gas again... i figure its normal....

Honest, I did not have this issue before I had my 15000 mile trnsmission service. Now it makes me crazy. Is this possible?? </div></BLOCKQUOTE>


Who ripped you off for a transmission service already?
Even with heavy duty use it's not recommended to do a trans service until 50k.

HUMMER H3 Maintenance Schedule
Automatic Transmission Fluid and Filter Replacement
Replace the automatic transmission fluid and filter
Interval: Every 100,000 miles unless the vehicle is mainly driven under one or more of these conditions: 1) In heavy city traffic where the outside temperature regularly reaches 90 F (32 C) or higher, 2) In hilly or mountainous terrain, 3) When doing frequent trailer towing, and 4) Uses such as found in taxi, police or delivery service. If vehicle is driven under these conditions, change every 50,000 miles.

[HummBebe]

Originally posted by 1COOLH3:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HummBebe:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by wannabeH3:
yes, i get it when slowing down then getting on the gas again... i figure its normal....

Honest, I did not have this issue before I had my 15000 mile trnsmission service. Now it makes me crazy. Is this possible?? </div></BLOCKQUOTE>


Who ripped you off for a transmission service already?
Even with heavy duty use it's not recommended to do a trans service until 50k.

HUMMER H3 Maintenance Schedule
Automatic Transmission Fluid and Filter Replacement
Replace the automatic transmission fluid and filter
Interval: Every 100,000 miles unless the vehicle is mainly driven under one or more of these conditions: 1) In heavy city traffic where the outside temperature regularly reaches 90 F (32 C) or higher, 2) In hilly or mountainous terrain, 3) When doing frequent trailer towing, and 4) Uses such as found in taxi, police or delivery service. If vehicle is driven under these conditions, change every 50,000 miles. </div></BLOCKQUOTE>

I'm sorry, I meant transfer case and rear diff. The tech checked them and said they had to be serviced. Did they burn me??? I find it hard to believe.

[Edspad]

Originally posted by HummBebe:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by 1COOLH3:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HummBebe:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by wannabeH3:
yes, i get it when slowing down then getting on the gas again... i figure its normal....

Honest, I did not have this issue before I had my 15000 mile trnsmission service. Now it makes me crazy. Is this possible?? </div></BLOCKQUOTE>


Who ripped you off for a transmission service already?
Even with heavy duty use it's not recommended to do a trans service until 50k.

HUMMER H3 Maintenance Schedule
Automatic Transmission Fluid and Filter Replacement
Replace the automatic transmission fluid and filter
Interval: Every 100,000 miles unless the vehicle is mainly driven under one or more of these conditions: 1) In heavy city traffic where the outside temperature regularly reaches 90 F (32 C) or higher, 2) In hilly or mountainous terrain, 3) When doing frequent trailer towing, and 4) Uses such as found in taxi, police or delivery service. If vehicle is driven under these conditions, change every 50,000 miles. </div></BLOCKQUOTE>

I'm sorry, I meant transfer case and rear diff. The tech checked them and said they had to be serviced. Did they burn me??? I find it hard to believe. </div></BLOCKQUOTE>
Probuly not, Ive seen the way you wheel sister. there is a slight mad glint in your eyes as you have blown past me on obstacles, Tranny screaming in pain and Diffs glowing hotter than the day they were forged. Sounds about right

[Dave LV]

Originally posted by ChevyHighPerformance:
Does it feel like the torque converter is unlocking?

No [YES!] because that occurs right around 39 mph. This can occur at lower speeds after driving at highway speeds [I rechecked, and it is right at 39 mph]. Definitely more like the center dif is unlocking, but I just don't know [yep, torque converter unlocking]. Not a big thing, but a quirk of the H3.
[I am surprised that the H3 torque converter does not unlock when the brakes are pressed - or am I misreading it?]
[modified 3/27/06]

[HummBebe]

Probuly not, Ive seen the way you wheel sister. there is a slight mad glint in your eyes as you have blown past me on obstacles, Tranny screaming in pain and Diffs glowing hotter than the day they were forged. Sounds about right Wink

LMAO ED.....

[HummBebe]

Seriously though, what could it be??? After decellerating, when you begin to accellerate, there is a deep sounding (like when you forget to downshift and try to take off....lugging the engine) clunk/jerk before it will shift down to accellerate.Usually around 2000 RPM's.

I know the "hunting" thing is normal for GM....but again, this didn't start until I had the T-Case/Rear diff serviced.

Also, when I did have the T-case serviced, I went to pick it up, and as I drove down the street, (after hours of course) it would not shift out of first So I had to leave it there and come back the next morning. They fixed
it quickly and sent me on my way.

They forgot to reconnect the "shift soleniod"??? (I can't remember exactly)

Am I making any sense???


I would like to resolve this before I head out to Moab. If it is not a big deal, I can wait.

Thanks in advance for your help.

Bebe

[Edspad]

Go Back to the service dept, make a point of one of the tech's going with you on a test drive
tell'em you want a explanation written. if there is a quirk in software or even an issue on the build out of a mechanical device, Most of the time the factory will send out tech reports on the problem. dont let'em walk on ya...push your chest out and roll the corner of your lip over a tooth
There must be an explanation !!
.
.
Is your Pony Car a Auto or a Manual?

[HummBebe]

Originally posted by Edspad:
Go Back to the service dept, make a point of one of the tech's going with you on a test drive
tell'em you want a explanation written. if there is a quirk in software or even an issue on the build out of a mechanical device, Most of the time the factory will send out tech reports on the problem. dont let'em walk on ya...push your chest out and roll the corner of your lip over a tooth
There must be an explanation !!
.
.
Is your Pony Car a Auto or a Manual?

Teh Pony is a manual, we've put on a CAI, Exhaust and a Super Chip.....yee haw!!!!! We are at 380hp, 425tq. She scoots just a little.

push your chest out and roll the corner of your lip over a tooth

What a visual.....Tanks Ed!

[UNOMYFLO]

I have the same jerk, when crusing on the hwu at like 65 when I come up on traffic and let up on the gas then hit the gas again there is definately a jerk as the truck accelerates again.

I think it can be 2 things:

First thought i have is the throttle is electronic controlled by the computer the accel and decell is not fluid perhaps it is in the programming.

My 05 dodge ram hemi laramie had an electronic throttle and did not do this.

the secone thing I thought it could be is perhaps to much play in the ring and pinion in the rear end, it feels as though there is play in it and this is the reason for the jerk. When crusing and having the accel depressed the rear gears are under preload when the foot is taken off the gas the preload goes away finding the play in the gears when the foot is back on the gas the gears find preload and during thsi time is the jerk.

Seems like a lot of us have it which is good as if this becomes a problem in the futurew the warantee will kick in intil then it annoys me but I figure is it ****s the bed I will bring it in.

UNO

[UNOMYFLO]

Oh I have 4500 on the odo by the way and it did it right out of the box new.


I bet it is the electronic throttle...perhaps it can be recalibrated through the computer to have tighter tollerances and a tighter feel on and off the gas..

would be nice anyway