I took advantage of a longstanding rear main seal leak to have our dealer, at the same time, install a new "euro" JK TC (I supplied it from Mopar Parts America). under the factory extended warranty (62K, now). The deductible is $100, apparently per visit, so it looked like by far the least expensive way to get a new TC installed. We also got the fried heater blower circuit board replaced at the same time. (Fan only worked on "high".)

BTW, the TC seal reportedly did not appear to be leaking when they got it apart, so this did not require a new pump, plate and seal to be installed. FYI, they had told me that if it was leaking, they would replace all that stuff under warranty. However, if it was done simply at my request, it would add $1,000 to the bill, parts and labor.

(The only reported problem was stripping the heads, when removing them, of several of the Torx bolts that hold the flex plate on. New bolts were not in stock and had to be ordered.)

My wife picked it up and did not notice anything out of the ordinary. I immediately noticed a new whistleling/whirring sound that is clearly related to engine RPM. It is quite apparrent under load at low speed up to 2000 RPM. It is also possible to hear it in the driver's seat, in neutral, increasing in volume as you bring it up to 2000 RPM, but it is much fainter than when under load. I have been all over the top and bottom of the motor with the engine running at 2000 RPM and I just can't seem to pinpoint the location. It sounds the same as when a bearing was going on the alternator on my '99 Passat, except that that was not load dependent.

I immediately suspected a slight turbo hose leak, but I had asked the dealer tech to check the hose condition and clamp tightness and he had indicated that all looked good. To the extent that I can look at it in my driveway, I can't pinpoint the location. No adjustments were made to the serpentine belt tension and the exhaust was supposedly not disturbed in the R&R of the trans. The fact the the noise is louder under load when there is obviously more boost than running at the same RPM in neutral, clearly makes one lean towards something to do with the turbo system.

My boost gauge is still not connected, so I can't tell if there is a slight drop in boost. If there is a slight leak, it is not enough to set any codes. The scanner shows none. (A while ago, when the turbo solenoid was failing, I did get a "low boost" code.)

So, this is holding up my getting back to the dyno to do a back to back comparison of the GDE ECO and HOT tunes. I want to get it cleared up so as to not introduce any extra variables.

So what do you folks think?

Thanks As Always,

DOC

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2005 KJ CRD Ltd Detroit TrueTrac Bilsteins G2 GDE "HOT" ECU GDE TCM "Tow Tune" "euro" TC SEGR Weeks Elbow New HG at 130K ARPs Clean CAT aFe Filter Magnaflow Exhaust EHM Cumminos In-Tank Lift Pump Hayden Fan Clutch Nylon Fan VH Enabled with GDE lower shutoff point Recalibrated Temp Gauge Tekonsha Prodigy Sears P-1 ZDDP

Doc

Mine has not turned 30k yet so I guess the RMS could still start leaking and I also have a 7/70 extended warranty

I'm guessing but when they pulled the transmission they had to lower the rear of the engine. If so any number of vacuum lines could have been disturbed. Vacuum controls the EGR and turbo boost. Also if they needed to lower the rear of the engine it would there would be some stress put on the exhaust piping.

If it's a bearing you can use the screw driver to the ear trick or a stephoscope but cacuum leaks are hard to pin point.

By the way, there's a improved resister pack for the blower that is made much more substancial. It's for the 02-04 (as I remember) Sebring that used the same as ours and they failed as ours are. The heavier unit was $26 as I recall at Advanced autoparts and is a 15 minute job to replace.

Good luck on athe noise and how does it drive?

Joe

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

As a diagnostic procedure, get the vehicle up to TC lock-up speed, I.E. >50MPH. Turn on cruise control. Now go up a steep hill. The engine speed will remain at a constant RPM, but the turbo speed is load dependent and independent of engine RPM. Vacuum in a diesel is dependent on engine RPM and does not change pitch with load.

Does the whistling you are describing change pitch with load irrespective of engine RPM? If so it is turbo related.

There is also a condition which can cause changes in noise pitch dependent on load as well as engine RPM when the TC is not locked up. Being that you have a brand new torque converter, the TC turbine itself may be whining if there is any air or defect in it. This sound however, will not be evident during lock-up.

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Manure green 2005 CRD sport4x4, GDE Hot tune, Cat Gut, OE skids, Draw tight hitch, Duramax lift pump, 160K on multiple varieties of fuel, XM radio, Escort live with Redline, fog light mod, GPS, Icom IC7000 all band radio call sign KC9QPF, Grabber AT2s on Soft 8s, FIA grill blanket.

The noise is ALWAYS engine speed related (i.e. pitch increases with engine speed). It is LOUDER under load. (It still makes the same sound in "park" as the RPM increases, it just is not nearly as loud, making it very difficult to find.

I may have to use the dyno to locate it.

DOC

_________________
2005 KJ CRD Ltd Detroit TrueTrac Bilsteins G2 GDE "HOT" ECU GDE TCM "Tow Tune" "euro" TC SEGR Weeks Elbow New HG at 130K ARPs Clean CAT aFe Filter Magnaflow Exhaust EHM Cumminos In-Tank Lift Pump Hayden Fan Clutch Nylon Fan VH Enabled with GDE lower shutoff point Recalibrated Temp Gauge Tekonsha Prodigy Sears P-1 ZDDP