Is it possible to install a switch on a Mitsubishi Eclipse to change the torque split: more to the front, more to the rear,
100% to the rear...

No.

There was however a transmission and t-case combo that allowed you to run AWD or FWD, but you had to pull a retention clip on the trans and a second on the t-case, allowing the viscous coupler in the trans to "lock", and the t-case to disengage. They must be used in tandem to function properly, and I believe the spline counts are specific, but not 100% on that aspect. I have one of the transmissions in my posession, it's an interesting piece.

So, not really a way to bias more to the rear vs front.

Lorelon said:

Is it possible to install a switch on a Mitsubishi Eclipse to change the torque split: more to the front, more to the rear,
100% to the rear...

Click to expand...

Also our systems are not electronic in any way.

Thanks for the clear answer!

tametalon92 said:

No.

There was however a transmission and t-case combo that allowed you to run AWD or FWD, but you had to pull a retention clip on the trans and a second on the t-case, allowing the viscous coupler in the trans to "lock", and the t-case to disengage. They must be used in tandem to function properly, and I believe the spline counts are specific, but not 100% on that aspect. I have one of the transmissions in my posession, it's an interesting piece.
So, not really a way to bias more to the rear vs front.

Click to expand...

I have the switchable transmission and the T-case. Yeah interesting, I am curious so I am planning to open them up to see how it is. Mine is 22 spline but maybe there is 23 spline also if the unit was with the late GVR4. Seems to be useful if there is no awd dyno nearby.

DSMPT said:

I have the switchable transmission and the T-case. Yeah interesting, I am curious so I am planning to open them up to see how it is. Mine is 22 spline but maybe there is 23 spline also if the unit was with the late GVR4. Seems to be useful if there is no awd dyno nearby.

Click to expand...

I believe the intention was to increase fuel efficiency for times when AWD wasn't necessary, not sure if Dyno was a consideration, but nowadays it does make for an easier time when tuning on the Dyno!

I haven't disassembled a switchable t-case, but the trans is interesting, as the retention for the peg slides a ring up and down on the viscous coupler, allowing it to do it's normal job (peg locked in) or be locked (peg free in out position) like a VCE or welded CD.

I assume the t-case is similar, and has a collar that locks the output shaft together or disconnects it.

tametalon92 said:

I believe the intention was to increase fuel efficiency for times when AWD wasn't necessary, not sure if Dyno was a consideration, but nowadays it does make for an easier time when tuning on the Dyno!

I haven't disassembled a switchable t-case, but the trans is interesting, as the retention for the peg slides a ring up and down on the viscous coupler, allowing it to do it's normal job (peg locked in) or be locked (peg free in out position) like a VCE or welded CD.

I assume the t-case is similar, and has a collar that locks the output shaft together or disconnects it.

Click to expand...

You are right Of course dyno was not a consideration.
I remember that "to get better gas mileage on weekdays and have fun on weekend" or something like that was the catch phrase used in japanese gvr4 catalog and mitsubishi salesman.
I have had this transmission for 10 years and always being curious about the mechanism but it never got broken. so I haven't had a chance to open to see the inside since always mounted. but now this one is just lying in my garage, so I am planning to open them. I will take some pics and upload it here when I do.

Transfer case has a disengaging gear, in the rear output shaft. I used those extensively in the late 90's/early '00. Mostly because I HATED driving around with a locked center diff! And I used it for the FWD dyno.

Trying to set boost in FWD mode was interesting. My 600hp Talon would spin tires at 90 mph in 3 gear