So after bout a week of the truck sitting it shifts like a sweetheart in 2 HI...this has got to be an electronic failure but where?????

 

1994 Auto 4wd.....the transmission is in selector position 2HI...one day it started acting up and it runs like as if it were locked/selected into 4low...maximum speed is 40MPH...the transmission does not slip at all..the front drive shaft is not locked in it is free.....I removed both transmission fluid pans (fluid nice and red as PO had obviously had trans work done in the past) checked the three solenoids two in the main transmission and one in the transfer area....I direct dc jumped them and they all actuate as quickly as you apply and cut power......put everything back together and went for a test ride the transmission worked tits for a fifty mile trip no problems at all shifted smoother and at lower revs than when I bought it....stopped for a barley pop and when i jumped back in the truck the trans was "locked in virtual 4low" again...crawled home (5 miles) ......I reset the ECM....Turned it on turned off turned it on turned off...tried it everyday last week still in virtual 4low (top speed 40mph but shifts through all 4 gears)...threw a 4sale sign on it this morning some cat came to look at it and when we took it for a spin it ˟˟˟˟fed beautifully...better than when I bought it.....a few hours later I picked up the truck from my 4sale place and drove it around town again shifting like a cream pufff.....there is no slippage of the trans it just goes into this virtual 4 low with front shaft still in free...moving the selctor to 4hi and 4 low does engage froint drive line..however the virtual 4 low bog and whine of the transfer remains the same throught all three ranges.... as stated right now the truck runs like a tramp the trans shifts smooth as silk.......this has got to be electronic no????

 

to the top..........

 

same stuff happened t ome until it gave out and now the runner sits until i decide to tear her apart and see what got f@#$ed up it was an off and on thing right and it torqued up real hard off the start when you put it in drive asnd then it would act up and other times it was fine get rid of it now and let it be someone elses problem b/c mine probably will be once it gets fixed