Quote:
Originally Posted by Tapani
Good morning mates,
Pardon me my ignorance, but the 3-4 OWC seems to be operating in a number of situations which appear to be ok in Nates tranny.
For example if the 3-4 OWC would slip, wouldn't the tranny slip in third while in "D", eh? The torque should go thru the high clutch, forward clutch and the OWC to the rear planetary inside gear.
There would be a third gear only while in "3" - the over running clutch would transmit the torque.
Also would'n there be a second gear while in "2" (torque would be transmitted by the over running clutch)?
Further, if the 3-4 OWC would be slipping there would be a first only in "1".
I'm just looking at the torque flow charts  and as you know, I've never seen a 4EAT fully apart.
There's also a good written description of each gear in each selector position in the manual in chapter 20A Power Train, oparation. Nate, bite the bullet and dig out the manual  !
Tightnening the band adjustment by one turn is an easy try and should do no harm - hard to imagine how that could be thrown off suddenly and cause your problem, though.
Kind regards,
Tapani |
My thoughts precisely related to the 3-4 owc as I read through and re-read through some technical info related to operation of the 4eat
As far as digging out the manual, it's a bit tricky as I'm in the middle of a move (quite literally) so while it is packed in the car, I believe I need to dig a few other things out of the way. I'll try checking out the online versions though.
As for it "being thrown off suddenly" as you mention. That, I have no way of knowing. I purchased this car as having a "bad transmission". Upon purchase, there was no battery juice as the car had been sitting well over 2 years. I towed it to where it sat for a few months with starting it to move it off the dolly and park it. Then I posted this, that was when I moved it from the house where it was, to the shop space that I have (about 25 miles) and was able to get these symptoms as described. So my point is, I have no idea if it was slipping for awhile, or if it was an "all of a sudden" type thing. Upon pickup of the car, I had just assumed a high clutch failure as is so common so I was shocked when I drove it and it had proper operation of the high clutch.