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Discussion Starter #1
Aloha dmaxallitech,


First, thanks for taking the time to answer these questions.


Background: I have a 1997 S-10 Blazer with 4.3L and auto. I have changed the trans fluid every 25-30K miles. After the 60K change, I noticed a lot of rusty sludge building on the trans dipstick. I have attempted an internet search and found a few threads that mentioned others have had this problem and appears to be the tube is rusting.


I have three questions. 1 - Is this a known problem and will a new tube, along with fluid change, fix the problem? 2 - Can I change the tube without dropping the trans? The clearance to pull the trans/engine bolts looks tight. 3 - How do I prevent this in the future?


Thanks again, Corey.
 

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<H1><font size="2">HERE YA GO::</font></h1>
<H1>Tech - Rusty Transmission Fluid Level Indicator/Transmission Oil Filler Tube #99-07-30-004A - (10/06/1999)</h1></table>Rusty Transmission Fluid Level Indicator/Transmission Oil Filler Tube (Replace Indicator and Filler Tube)


1995-98 Chevrolet and GMC S/T Models


1996-98 Oldsmobile Bravada


with 4L60-E Automatic Transmission (RPO M30)


This bulletin is being revised to correct parts description information. Please discard Corporate Bulletin Number 99-07-30-004 (Section 07--Transmission/Transaxle)


Some owners may comment about rust on the transmission fluid level indicator and the transmission oil filler tube.


Water entering through the grommet of the indicator may cause this condition.


A new transmission fluid level indicator, with an improved grommet and corrosion resistant metal, has been developed to correct this condition. Replace the indicator and, if necessary, replace the transmission oil filler tube on affected vehicles. Use the following procedure and the appropriate part numbers listed below.

  1. <LI =1>Replace the indicator with the revised indicator.
    <LI =1>Also, inspect the transmission fluid filler tube for signs of excessive rust on the inside or outside of the tube. Replace the tube as necessary. Refer to the Filler Tube Replacement procedure in the Automatic Transmission 4L60-E subsection of the appropriate Service Manual.
    <LI =1>Change the transmission fluid. Replace the transmission filter. Refer to the Transmission Filter Replacement procedure in the Automatic Transmission 4L60-E subsection of the appropriate Service Manual.
<A name=ss4-641479><a href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=641479&pubid=39&evc=sm#ss4-641479" target="_blank">
<H5>Parts Information</a></h5>
<TABLE width="100%" border=1>
<T>
<TR>
<TH vAlign=bottom align=middle>


P/N</th>
<TH vAlign=bottom align=middle>


Description</th>
<TH vAlign=bottom align=middle>


Qty</th></tr>
<TR>
<TD vAlign=center align=middle>


15033543</td>
<TD vAlign=center align=middle>


Indicator, Trans. Fluid Level


(LN2)</td>
<TD vAlign=center align=middle>


1</td></tr>
<TR>
<TD vAlign=center align=middle>


15033544</td>
<TD vAlign=center align=middle>


Indicator, Trans. Fluid Level


(LF6/L35)</td>
<TD vAlign=center align=middle>


1</td></tr>
<TR>
<TD vAlign=center align=middle>


15704674</td>
<TD vAlign=center align=middle>


Tube, Trans. Fluid Level Ind


(LN2) (95-97)</td>
<TD vAlign=center align=middle>


1</td></tr>
<TR>
<TD vAlign=center align=middle>


15722634</td>
<TD vAlign=center align=middle>


Tube, Trans. Fluid Level Ind


(LN2) (1998)</td>
<TD vAlign=center align=middle>


1</td></tr>
<TR>
<TD vAlign=center align=middle>


15735192</td>
<TD vAlign=center align=middle>


Tube, Trans. Fluid Level Ind


(LF6/L35) (96-98)</td>
<TD vAlign=center align=middle>


1</td></tr>
<TR>
<TD vAlign=center align=middle>


15999402</td>
<TD vAlign=center align=middle>


Tube, Trans. Fluid Level Ind


(LB4/L35) (1995)</td>
<TD vAlign=center align=middle>


1</td></tr></T>&lt
 

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Discussion Starter #5
dmaxalliTech,


Continuing saga with trans dipstick...


My wife took the Blazer to the dealer because it has been generating "Check Engine Light." The light will come on one day and off the next, not continuous.


Dealer apparently is able to read stored code and says it correlates to transmission issues and the entire trans is full of sludge and needs replacement. Dealer blamed lack of servicing on my part, I service the trans every 25-30000 miles, not poor design as stated in TSB. I know it has a bit of muck due to previously stated dipstick issue, but I can't believe it is total sludge after only about 15,000 miles since last service. Dealer wants $2200 in parts and $2,000 in labor to fix.


I have a few more questions. 1 - Have you ever heard of this extreme condition? 2 - Can the check engine light generate a code for a transmission problem? (I thought it would only generate codes for emissions issues). 3 - If the trans is trashed, is $4500 a bit much?


I very much appreciate your help. I am out of area with the military and need a solid piece of mind that my wife is getting legit answers.


I asked her to have the dealer write the code on the receipt (currently I have declined a trans replacement) and will post it when I get it.


Thanks again, Corey
 

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Corey, hate to sound rude, but does it hurt to sitdown? 4500 is enough for an Allison!!! 2500 should get you a gm reman installed. I wouldnt do anything until you let me know the code(s) There is codes for the tranny as well... Let me know what they are please before doing anything drastic
 

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Discussion Starter #7
dmaxalliiTech,


I can't tell you how much your answers help.


The code that was pulled for the 4L60-E was P1870.


I have used this dealer once before for warranty work on my 2500hd and a few times for my wife's Blazer when I have been away and they have been legit. Just looking for an answer/opinion from an expert like yourself. I thought $4500 for a 4L60-E was a bit pricy.


What transmission flushing system(s) do you recommend. I figure this thing needs a total flush.


Thanks again, you are the king, Corey
 

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Corey,


On my suburban I had to have a 4L60-E replaced, and a local, well respected tranny shop did it for $1600 out the door. This was a swap for a rebuilt tranny, all parts and labor. $4500 is way out of line!



John
 

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Code 1870 is Trans slip detected. usually caused be high tcc slip which is not noticable to the driver but the pcm picks it up. How does the tranny work? just a code in it? any debris in the pan?.. There is an aftermarket valve to put in the valve body made by sonnax that can cure it if its caused from excessive tcc slip, this code will also cause harsh shifts as it commands max line pressure. If the trans operation is ok and no problems other then ses light on, you can fix it for a few hundred bucks tops.
 

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Discussion Starter #10
CS-Dmax and dmaxalliTech,


Thanks for the prompt replies. The power of the internet is amazing.


The trans works fine, silky smooth. I will complete a flush/service as soon as I return home. I know the pan is going to have a bit of the gunk from the deteriorating dipstick/tube, but I won't know for sure until I drop the pan. It just seems to be working too good to have major component failure.


Thanks again, Corey
 
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