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Old 09-12-2011, 10:24 AM   #1
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4L60e transmission 1-2 shift accumulator location?

So I'm having transmission problems in both my cars right now. This is actually for my trailblazer but I'm not getting a lot of responce from the trailblazer forum and you guys seem to know alot and its pretty similar to the 700r4 tranny as I understand. When shifting from 1-2 I'm getting a pretty bad shudder but that is the only problem its having. I think this is the problem from this site http://www.twincharlotte.com/transmi...r-Charlotte-NC

3. 1-2 Shift shudder at WOT (Wide Open Throttle); delayed or abnormal 1-2 shift; There's a problem ONLY on the 1-2 shift: 1-2 accumulator piston cracked or stuck cocked in the bore. Check the yellow spring inside the accum housing for breakage. Also, if the accumulator housing walls are scored, the housing must be replaced.

My question is where is the 1-2 shift accumulator and can it be changed without dropping the transmission? Any help would be great! Thanks!
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Old 09-12-2011, 12:28 PM   #2
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Re: 4L60e transmission 1-2 shift accumulator location?

Yes.

:google:

try http://carcraft.automotive.com/10108...ion/index.html
instead of http://www.carcraft.com/techarticles/ccrp_0711_4l60e_to_4l65e_gm_transmission_conversionviewall.html

Click the image to open in full size.


http://www.gearstar.net/articles/details.php?unid=21

Quote:
16) This assembly is a modified 1-2 accumulator piston and its housing, which improve and regulate the 1-2 shift. Gear Star tailors the combination of springs for different combinations.
Click the image to open in full size.

Last edited by jmd; 09-12-2011 at 03:37 PM.
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Old 09-12-2011, 01:17 PM   #3
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Re: 4L60e transmission 1-2 shift accumulator location?

Thanks for the reply! Was that a how to article on it from carcraft? The link you gave didn't work and I'm searching their site but haven't found anything on it. How did you find it?
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Old 09-12-2011, 03:38 PM   #4
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Re: 4L60e transmission 1-2 shift accumulator location?

I edited the link.
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Old 09-13-2011, 08:24 PM   #5
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Re: 4L60e transmission 1-2 shift accumulator location?

Thanks, I'm ordering the sonnax pinless piston. Hopefully that is all that is wrong..
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Old 09-14-2011, 12:22 AM   #6
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Re: 4L60e transmission 1-2 shift accumulator location?

Check the accumulator spring to see if its broken
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Old 09-14-2011, 12:22 AM
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