Sonnax?
#1
Launching!
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Join Date: Oct 2008
Location: Bowling Green, KY
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Sonnax?
Anyone used the Sonnax stator shaft? They claim it cures the 1870. Am I better off just putting new bushings in or getting this stator shaft?
http://www.sonnax.com/part_summary.php?id=3554&pl=3
http://www.sonnax.com/part_summary.php?id=3554&pl=3
#2
On The Tree
Join Date: Jun 2007
Location: haltom city/DFW, Texas
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The sonnax part is a good part , but the stator shaft isn't what causes the 1870 code . The most common cause other than a bad or slipping converter clutch is the TCC/PWM valve bore in the valve body . The bore wears out from the PWM valve cycling continually . The stator bushings wear and can cause a leak , but new bushings can be installed . The splines wear on the end of the stator shaft and that would be the only reason to change it . It can be a bitch to press it out and press the new one in and often will crack the aluminum casting .
The valve body bore can be serviced with a sleeve that sonnax also makes . The Transgo-2 shift kit eliminates the PWM function by replacing the valve and spring . This can be less expensive to do because the sonnax part requires a reemer that is over a hundred $$$ . Unless you know someone at a transmission shop that has the tool , that wouldn't be the best option .
Some rebuild kits now come with a spring that works like the Trango set up .
The other option is to go to GM and buy a new valve body $$$$$$$$
Good luck , John
The valve body bore can be serviced with a sleeve that sonnax also makes . The Transgo-2 shift kit eliminates the PWM function by replacing the valve and spring . This can be less expensive to do because the sonnax part requires a reemer that is over a hundred $$$ . Unless you know someone at a transmission shop that has the tool , that wouldn't be the best option .
Some rebuild kits now come with a spring that works like the Trango set up .
The other option is to go to GM and buy a new valve body $$$$$$$$
Good luck , John
#3
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The stator bushings can cause premature clutch failure resulting in an 1870 code.
Greg
Greg
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FTI COMPETITION CONVERTERS AND TRANSMISSIONS
"IT'S NOT CHEATING, IT'S THE COMPETITIVE EDGE."
1-866-726-8358
info@ftiperformance.com
FTIPerformance.com
FTI Converter build sheet