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P1870 after rebuild.. help?

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Old 06-16-2009, 08:04 PM
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Default P1870 after rebuild.. help?

So, here is my series of events.

I broke the rear ring gear. I replace that and the related items (pinion gears etc).

I replaced the clutches in my 3-4 9 pack as the steels were in bad shape. the rest of the steels and clutches were in good shape and had good clearences.

I replaced the band.

I then installed the transgo-hd2 kit (most recent edition).

Replaced the seals etc.

Everything is amazing, better then when I had a shop rebuild it....

EXCEPT...

I now throw a p1870 code. Any ideas guys?
Old 06-18-2009, 10:44 AM
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any idears guys?
Old 06-19-2009, 03:20 AM
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just wait a bit,FLT or performabuilt should chime n and be able to help
Old 06-19-2009, 08:39 AM
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P1870 generally happens when the TCC is commanded on and either slips or does not engage. I would verify lockup is happening first, If not here a list of possible causes for no lockup.
1-oring missing from input shaft
2-TCC VALVE missasembled
3-PWM valve assembly missassembled
4-TCC solenoid bad
5-PWM solenoid bad (TG KIT SHOULD HAVE MADE THIS A NILL POINT)
6-Converter clutch issue.

Hope this helps and dont drive it alot till fixed P1870 will cause max line and potential damage possible to hard parts
Old 06-19-2009, 05:22 PM
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Originally Posted by performabuilt
P1870 generally happens when the TCC is commanded on and either slips or does not engage. I would verify lockup is happening first, If not here a list of possible causes for no lockup.
1-oring missing from input shaft
2-TCC VALVE missasembled
3-PWM valve assembly missassembled
4-TCC solenoid bad
5-PWM solenoid bad (TG KIT SHOULD HAVE MADE THIS A NILL POINT)
6-Converter clutch issue.

Hope this helps and dont drive it alot till fixed P1870 will cause max line and potential damage possible to hard parts

AH CRAP!....

I am 90% sure its the orgin missing from the input shaft.
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