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?

 

any idears guys?

 

just wait a bit,FLT or performabuilt should chime n and be able to help

 

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.