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Old 02-09-2000, 03:01 PM   #1
webkris
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Question 22B Center Diff Control?

Okay - two quick ones for you 22B guys out there...

This is what I think to be true...

#1 is Mirror control - okay that was easy.
#2 is Center diff. control?
#3 pulls the mirrors in?
Please enlighten me

I'm about to "experiment" with the tourque voltage output on the automatic - there is a mysterious extra set of wires that goes to that area of the center console - not plugged to anything. hmm.

Oh, and how would I order that part if I needed it? Call STi up? - Thanks, Kris
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Old 02-09-2000, 03:19 PM   #2
Greg Sharpe
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From what I have seen throughout the many magazine articles on super Subarus, the roller at #3 is the center diff torque adjuster. You can see it even has that white hash mark on it (dialed towards the back! ) to show where the torque setting is currently located.
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Old 02-09-2000, 04:16 PM   #3
kelley nelson
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The white thing is the diff control. There is also a little indicator on the instrument console that displays the diff setting.

[This message has been edited by kelley nelson (edited February 09, 2000).]
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Old 02-09-2000, 05:58 PM   #4
MPREZYA
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Kris you better keep me posted on this as I was tempted to try something with the fuse holder on the firewall but first i would check for any voltage if possible.
Rich
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Old 02-14-2000, 09:24 AM   #5
mjos
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Keep me posted real tight on what you find for the voltages on that extra connector. I started to explore this possibility but ran out of gas when I found that changing the torque split manually on the automatic wouldn't work correctly because the ABS wheel sensors would throw an error code to the ecu if you modified the split?? This is yet to be proven though.

MJ
 
Old 02-14-2000, 09:40 AM   #6
webkris
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hmmm. I don't have ABS on my 2.2L - This could get interesting for the RS guys.
Still in "the lab".*evil laughMuhahaha - Kris
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Old 02-14-2000, 10:25 AM   #7
ColinL
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Quote:
I found that changing the torque split manually on the automatic wouldn't work correctly because the ABS wheel sensors would throw an error code to the ecu if you modified the split??
Actually the wheels will still spin at the same rate regardless of how much torque is applied where. ABS shouldn't be an issue. Although it's my understanding that the current 4EAT uses additional sensors besides wheel speed to determine torque split, but Kris should encounter these issues if there are any.
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Old 02-14-2000, 10:30 AM   #8
Thug
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Anything I've ever read says that you cant have the adjustable torque split diff. w/ABS
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Old 02-14-2000, 06:14 PM   #9
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Well then, I guess the abs has to go. Any info yet Kris???
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Old 02-14-2000, 07:30 PM   #10
jackwei
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I don't see why that would be...
some auto subies are adjustable, not manually though, they have ABS...
oops, just read that they don't...use ABS sensors...delete...
hmm..well, the CR-V does, 100/0 to 50/50 split...:P variable! uses ABS sensors too!

hmm...
I don't see how those would conflict with each other though...


[This message has been edited by jackwei (edited February 14, 2000).]
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Old 02-15-2000, 01:21 AM   #11
dorimpreza
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umm, going from 100/0 to 50/50 although
i'm sure useful... somehow...
isn't a true variable torque system like
the sti centre diff type.

Umm anyway from what i've heard the
sti variable center diff setup works with your breaking so as you break torque distribution to front and back will tend to vary. i don't know the details.
but this poses an incompatability with the abs's ability to also distribute braking force between wheels
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Old 02-15-2000, 04:06 AM   #12
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I can't remember where I read it, but I thought the only reason that ABS and adjustable center diffs couldn't coexist was because the center diff control module took upt he same physical space as the ABS computer. Maybe I just haven't had enough coffee this morning...
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Old 02-15-2000, 04:10 AM   #13
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taht's why I was sticking my tongue out.
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Old 02-15-2000, 06:57 AM   #14
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On a 22B the centre control does not vary torque split but is an adjustable locking diff, and ABS can't work with locked diffs.

The torque split will change to 50:50 when the diff is locked, but not so much as a change in torque split as the fact that front and rear are essentially now one unit.

Let me know if you find any info on changing the autos torquesplit, or if you find any other connectors related to the gearbox, where is the TCU?

Paul
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Old 02-15-2000, 07:17 AM   #15
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Kris, I'm glad that you are going to go forward with your experiment. Good luck.
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Old 02-15-2000, 07:54 PM   #16
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Is this something that only auto trannys can play around with? Or can us manual guys play too?
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Old 02-17-2000, 07:01 PM   #17
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...just keep in mind the Sti's are using stronger mechanical rear diffs, and the standard one will wear out quickly if you manage to get this to work. They are only designed to recieve less than 50% of the power, and will fry if an open wheel spins for more than 10 seconds or so, repeatedly.
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Old 10-31-2000, 07:39 AM   #18
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I don't know if this will help any but on my auto 2000 rs i can switched it between front wheel drive and awd wheel drive.
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Old 10-31-2000, 08:22 AM   #19
Jude DeMeis
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Thumbs down

Impreza RX Australia,

The USA rear diff and STi rear diff is exactly the same -an R160 6.27" unit. There are several ratios available, but all are the same size. Some of them come with a GKN Viscodrive LSD. The only factory Impreza with a stronger rear diff is the 22B which has an R180 (same unit found in a late model Nissan 240SX). Group A Prodrive WRC cars have an even larger diff manufactured by Hewland. I really doubt one will "fry" the USA rear diff with the adjustable center diff, especially with a normally aspirated engine.
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Old 10-31-2000, 08:34 AM   #20
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Sorry to butt in,
I think you guys are probably taking about a Tar-mAc gear. It spits the torque ratio of front and back just by gear ratios. It improves acceleration into curves (rearwheel drive seems to be better in this case) by maintaining an allwheel drive cornering and acceleration out of curves. Used in WRC. Cusco makes them for any Impreza. Y'll have to import it from Japan though. So it's kinda like having a rear wheel drive and a AWD when you need it.
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