I'm dropping off my GC SRT for its first service on Monday. I was just wondering if anybody knows whether or not a TSB for "The Thud" (20mph transmission self-check) has been released.

it's not from the xmission, i think it's from the xfer case. and there is none forthcoming, it's a feature, not a bug.

it's not from the xmission, i think it's from the xfer case. and there is none forthcoming, it's a feature, not a bug.

Yeah it's normal.

Yeah it's normal.
i agree w/ jlandbl

I kind of getting to like that self check "thud"

My dealer said it is normal and no worries, Self Checking.

I have noticed that the thud is not as noticeable if you're in a higher gear, say 3rd compared to 1st.

Mine has really decreased as the milage has gone up. Use to do it all the time now maybe 1 or 2 time a month. They said it will decrease the more you drive.

Awesome, glad to hear that over time it will gradually disappear or at least become less noticable. Thanks for all your input.

Awesome, glad to hear that over time it will gradually disappear or at least become less noticable. Thanks for all your input.

Your welcome, nothing to worry about.

Mine has really decreased as the milage has gone up. Use to do it all the time now maybe 1 or 2 time a month. They said it will decrease the more you drive.
Mine is present at every start-up. :(

Mine is present at every start-up. :(

Hmmmm, it's funny because when this thread started I really had to think about how often this occurs to my truck because I basically forgot about it, and it is very rare now. What year is your truck, and how many miles you have? Mines an 06 with 8,956miles, I did have that TSB on "Drive Line Noise" maybe this has something to do with it?

'06 with 27k

Mines an 06 with 14k, does it at every start up

'06 with 27k

Did you have that TSB done for the drive line noise? Maybe this lessens it? :confused: I do know it really quieted up the "all wheel drive line" noise in my vehicle.

Mines an 06 with 14k, does it at every start up
'07 with 15k...does it every startup at 20+ mph. Very used to it and it would seem odd if it was not there.
I will see if it is still there with the new 9" Ford. Oh yeah, the modified trans, oh and the modified transfer case.

Bet it is still there as an electronic check.
Bill

Did you have that TSB done for the drive line noise? Maybe this lessens it? :confused: I do know it really quieted up the "all wheel drive line" noise in my vehicle.
No, I haven't had that done. Got a link to info on this TSB?

No, I haven't had that done. Got a link to info on this TSB?

this was the TSB number:21-014-06a / FLASH: ERRONEOUS FAULT WARNING - SERVICE 4WD SYSTEM ILLUMINATED

Here's the link:http://www.wkjeeps.com/wk_tsb.htm

I kind of getting to like that self check "thud"

Yeah, it's really cool.

this was the TSB number:21-014-06a / FLASH: ERRONEOUS FAULT WARNING - SERVICE 4WD SYSTEM ILLUMINATED

Here's the link:http://www.wkjeeps.com/wk_tsb.htm
But I haven't had a warning light illuminated. :(