TRNW-2: 850RE, 1-2 issue

[Chris and Cathy Kershaw]

First thing that comes to mind is software updates, second would be valve
body wear.
On Wed, Feb 26, 2025 at 4:28 PM Pat Schulte via trnw2 <trnw2 at trnw.net>
wrote:

> *Date:* Wed Feb 26 13:28:31 PST 2025
> *Subject:* 850RE, 1-2 issue
>
> 850RE out of a Dodge, actually 2 of them that I built that seem to have
> the same issue, but since I only have one of the vehicles here, I will
> discuss that one. The vehicle will attempt to make a 1-2 shift, it feels
> like it may change ratios for a split second then will command back to
> first and set a 1st gear ratio code, after that no further gear changes.
> The only things that happen on a 1-2 shift is the C clutch comes off and
> the E clutch applies. This unit has new C and E drums, they are correct
> size, proper clearance, they will aircheck tight through the shaft and when
> assembled, aircheck through the case. A scanner movie shows the C solenoid
> coming off and the E solenoid coming on at the proper time. I have
> confirmed by my own pics from last year and also from ATRA pic, the VB is
> correct. It has the white and orange solenoids which I cannot test, but I
> swapped solenoid positions which changed nothing. I have been into this
> unit twice and can find nothing wrong. The E ! drum was stripped when
> originally built. I am concerned that I maybe have built something into
> this unit but can find nothing. Any thoughts would be appreciated, sorry
> for the long post. Pat.
>
> Pat Schulte
> Aamco Transmission Temecula
> Temecula, California USA
> TRNW Member Since: 4/11/2008
>
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