I've never seen this but it sounds like you may have a leak in the
in-radiator cooler that's allowing water to enter the transmission.   I
would take it back to the dealer and let them check it out under the
warranty.


Group: alt.autos.gm Date: Sat, Apr 22, 2006, 10:01am From: abc@xyz.com
(DL)
I have a 1.5 yr. old GMC Envoy with a rusty transmission dip stick. I
can see flakes of rust deposit all along its length, and they are
falling off as I pulled the stick out of the tube. I have never seen
anything like this. Anyone has similar experience ? I don't know if the
tube is also rusted. This car has been well kept in a garage out of rain
and moisture.  

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
"Sometimes, when you're up to your butt in alligators, it's hard to
remember that the intial objective was to drain the swamp."  
~ Unknown ~

We had a Clark Fork Lift truck that the dipstick would rust on, caused
by water in the oil from lack of use. One dipstick even rusted in half.

Is your dispstick sealing at the top of the tube?

Try giving it a light coating of grease the full legnth of the dipstick.

Good Luck.

Harry Face

Moisture and/or acids in the trans.  Better have it looked at before it eats the
trans.  Common problem in _engines_ that don't get heated up or have leaks.  I've
never seen that in a trans though.

Is the Blazer version?  With the 4.3 v-6 engine?
What year is the vehicle?

We had issues with the transmission tubes and dipsticks
rusting. Here is an old bulletin that may apply.  If your
vehicle is only a couple of years old, this should have been
addressed by now.

RUSTY TRANS. FLUID LEVEL INDICATOR (REPLACE INDICATOR) #86-71-17 - (Jun 26,
1998)
SUBJECT: RUSTY TRANSMISSION FLUID LEVEL INDICATOR (REPLACE INDICATOR)

MODELS: 1995-98 CHEVROLET AND GMC S/T MODELS 1996-98 OLDSMOBILE BRAVADA WITH
M30 TRANSMISSION

CONDITION:

SOME OWNERS MAY COMMENT ABOUT RUST ON THE TRANSMISSION FLUID INDICATOR.

CAUSE:

CONDITION MAY BE CAUSED FROM WATER ENTERING THROUGH THE INDICATOR UPPER TUBE
SEAL.

CORRECTION:

ENGINEERING HAS RELEASED A NEW INDICATOR WITH AN IMPROVED SEAL AND CORROSION
RESISTANT METAL INDICATOR. REPLACE THE OLD INDICATOR WITH THE NEW INDICATOR.
USE THE PART NUMBER LISTED BELOW.

PARTS INFORMATION:

P/N DESCRIPTION QTY 15033543 INDICATOR, TRANS. FLUID 1 LEVEL (LN2) 15033544
INDICATOR, TRANS. FLUID 1 LEVEL (LF6/L35)

Ian