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Real FULLtime 4EAT??
Posted 10 December 2003 - 06:17 AM
My question is has anybody investigated putting a switch in so that it acts like a true 4wd ( a center "diff lock" if you will)??
Will the duty solenoid shift into 4wd when recieving a signal, or does it use it's signal to stay in 2wd. (Thus the reason for the 2wd fuse)
I have an spare automatic push button 4wd gear lever, I would like to wire the push button to activate the "diff lock".
Maybe I should take this to the "New Gen" forum?
Posted 10 December 2003 - 10:06 AM
Posted 10 December 2003 - 11:46 AM
Posted 10 December 2003 - 12:16 PM
Posted 10 December 2003 - 01:05 PM
he said something about the vacuum controls the 4wd clutches on a regular 3eat.
but i recall somthing about 4eat to lock in the clutches, but i cant remember if it was vacuum or electrical, i think from the new gen forum
i am going to hook up the 4wd button on my 5spd to the diff lock on the xt6 tranny
Posted 10 December 2003 - 08:00 PM
Ofcouse, the manuals have a diff lock. The EJs have a viscous coulpling center diff...in simple terms, something like an LSD. Constant 50/50. Where as our EA82 FT4WDs can lock, giving 50/50 no matter what happens.
Posted 10 December 2003 - 08:47 PM
Also from one position I had my car in, the front end was up in the air with one wheel in the air, with the car basically standing on the rear wheels. The one front wheel would spin, whereas the rears with the welded diff wouldn't budge. The one wheel in the air could still spin a fair amount, even though you could feel the rears trying to push the car. The tranny and wheel seemed to slip before the rears would move. Even in 50/50 mode the clutch still slips is what I'm trying to say. Oh ya and after trying to get over the obstacle like this for a few minutes, the tranny started to smoke, so I stopped
Posted 10 December 2003 - 09:14 PM
On many early legacys/imprezas, there was also a "Manual" button that "locked" the tranny in a certain gear.
Now, Im a little hazy on the details as my 95 Impreza automatic doesn't have one, but my understanding is if you press the button in 2nd, it will not shift out of second (up or down). Maybe someone a little more familiar with this button can chime in.
Posted 10 December 2003 - 09:27 PM
From my experience with a 4EAT AWD...on a 96 OB, EJ25...front and rear seemed to be 50/50 all the time. And one time, i was nose into a ditch, and one front would spin, and one rear would spin. SEVERE angle of attack...so there was no going forward, or backards. I think it about about 45 deg.
There have been a couple times where I've had the RX spin only the front...but on gravel, all four went. Even on slick mud, with the center diff off, the RX felt like 50/50, even tho its got an open center diff.
The OB never felt like it was out of 50/50, even tho its not supposed to do that in 3 and 4.
Posted 11 December 2003 - 12:15 AM
I think it acts more as a lock up stall converter in the converter, giving you better power through the gears, but I 'll check it and get back to you all tomorrow nite on the subject......Wife has the car right now....
Later, John in Oregon....
Posted 11 December 2003 - 01:39 AM
"the manual mode is used for driving in slippery condidtions. In position 3 the transmission holds 3rd (but shifts automatically between 2nd and 3rd during starting or low speed driving). In position 2 the transmission holds 2nd gear."
Posted 11 December 2003 - 05:47 PM
I think the newer than ea series awd uses a limited slip center differential. the wheel sensors are probably for the abs if equipped.
Posted 13 December 2003 - 09:43 AM
Both on topic and off.
My bad, this is an 89 FT4EAT it has no "manual button"
It has a "1st hold" button only
It also has no provision for starting in second gear,
(I think FHI slipped up here as it is a nice feature for snow running, all my other Subaru autos have this feature)
The gear shift pattern is
When starting in "2" from a stop, it still downshifts into 1st, then upshifts into "2" UNLESS the "1st hold" button is depressed.
Please believe me on this one.
That said I will now look deeper into the bowels of the FSM chapter on the extremely complex FT4EAT.
Does anybody know where the TCU is located on a 1989 GL-10 wagon? My plan is to add some form of visual indicators for the operation of the varrious duty solenoids.
Posted 13 December 2003 - 11:52 AM
Posted 13 December 2003 - 01:59 PM
I will need to to know what level of dwell these units get fed.
I will also have to find out if they are negativly signaled.
I was hoping we had someone that knew this, but alas
I guess I'm guessing
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