Non dccd jdm 6 speed binding - Subaru Impreza GC8 & RS Forum & Community: RS25.com
 
Private Support i-Trader Ratings Become a Vendor Rules for VendorsModsUsers Contact
Subaru Impreza GC8 & RS Forum & Community: RS25.com
gc8 RSS GC8 Facebook Subaru GC8 Twitter Subaru YouTube Channel Subaru Sticker
 
Login below or Register Now
Register Mark Forums Read FAQ Advertise
Go Back   Subaru Impreza GC8 & RS Forum & Community: RS25.com > >
Non dccd jdm 6 speed binding
Reply
 
Thread Tools Display Modes
Old 06-10-2019, 11:52 PM   #1
curiotmicuri
1.8L
 
Join Date: May 2019
Trader Rating: (0)
Posts: 6
Default Non dccd jdm 6 speed binding

Just finished swapping a non dccd jdm sti 6 speed with this code TY856WL4CC. It came with the original 3.9. When making sharp turns going slow its binding and also I experience the same when starting off going straight in first.a When driving on the freeway at 80 there are no issues.

Last edited by curiotmicuri; 06-11-2019 at 12:01 AM..
curiotmicuri is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-11-2019, 05:43 AM   #2
silverton
2.0L Turbo
 
Fav Mod: turrrrrbbbbooooo
Join Date: Aug 2012
Location: Burien, WA
Trader Rating: (0)
Posts: 1,126
Default

is your rear differential also 3.9?
__________________
2001 STM AutoMagic - boost for as long as I keep my foot down
silverton is offline   Reply With Quote
Old 06-11-2019, 07:36 AM   #3
curiotmicuri
1.8L
 
Join Date: May 2019
Trader Rating: (0)
Posts: 6
Default

it is.
curiotmicuri is offline   Reply With Quote
Old 06-12-2019, 11:40 AM   #4
silverton
2.0L Turbo
 
Fav Mod: turrrrrbbbbooooo
Join Date: Aug 2012
Location: Burien, WA
Trader Rating: (0)
Posts: 1,126
Default

If your tires are all the same size and all at the similar tread depths... it sounds like the center is binding. Depending on mileage and abuse it received... someone posted on nasioc about trying a different gear oil, ymmv
__________________
2001 STM AutoMagic - boost for as long as I keep my foot down
silverton is offline   Reply With Quote
Old 06-12-2019, 04:57 PM   #5
curiotmicuri
1.8L
 
Join Date: May 2019
Trader Rating: (0)
Posts: 6
Default

We were suspecting we got an incorrect rear diff. We marked the tires (all same size and everything) and drove it in first for a few rotations, the marks were not in the same place. We pulled the diff and it was a 3.9 so how can that difference be there. With the diff out we turned the front wheels and one spun the opposite way of the other. The guys at the shop say that points to a bad front diff. The only thing I was thinking could be a problem is the 06 m=>m front axles we used which are supposed to work. If they aren't causing the binding then the transmission would be bad right? Front diff or center diff? If the center diff is bad would that cause the asymmetrical rotation? It is supposed to be low millage and we are using oem stuff.


EDIT: follow up question. Can front axle binding cause a difference in the rotation front to rear?

Last edited by curiotmicuri; 06-12-2019 at 05:14 PM..
curiotmicuri is offline   Reply With Quote
Old 06-13-2019, 09:35 AM   #6
silverton
2.0L Turbo
 
Fav Mod: turrrrrbbbbooooo
Join Date: Aug 2012
Location: Burien, WA
Trader Rating: (0)
Posts: 1,126
Default

I don't think the axles could cause your problems. If they fit on the stub with the correct number of splines you're good to go. From what I can find about that trans code is that it's from a 2004 Forester STi. It does claim that the front diff is an A.P. Suretrac so when free spinning a front wheel the other side should be rotating in the same direction.



I was thinking transfer ratio but your transmission has a 1:1 TR so that's not it. Some cars (mostly WRX's) use a 1.1:1 TR with a 3.9 front diff and a 3.54 rear diff. Did you put a 3.54 rear diff in your car assuming it was a 3.9 from a 1.1 TR car? If the front tires are turning further than the rears in your marked test, that scenario is very likely.
__________________
2001 STM AutoMagic - boost for as long as I keep my foot down
silverton is offline   Reply With Quote
Old 06-13-2019, 10:36 AM   #7
curiotmicuri
1.8L
 
Join Date: May 2019
Trader Rating: (0)
Posts: 6
Default

Quote:
Originally Posted by silverton View Post
I don't think the axles could cause your problems. If they fit on the stub with the correct number of splines you're good to go. From what I can find about that trans code is that it's from a 2004 Forester STi. It does claim that the front diff is an A.P. Suretrac so when free spinning a front wheel the other side should be rotating in the same direction.



I was thinking transfer ratio but your transmission has a 1:1 TR so that's not it. Some cars (mostly WRX's) use a 1.1:1 TR with a 3.9 front diff and a 3.54 rear diff. Did you put a 3.54 rear diff in your car assuming it was a 3.9 from a 1.1 TR car? If the front tires are turning further than the rears in your marked test, that scenario is very likely.
Its a 3.9 R180 we counted how many turns it takes to get it once around and the parts distributor claims it all came from one car. Is there any other way the rears would turn a different amount than the fronts? One thing to point out, when I was pulling into my parking spot after i got the car back i was coasting into the spot in neutral and once I turned the car, it came to a stop without braking.
curiotmicuri is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 01:21 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright © 2019 VerticalScope Inc.
Designed & Powered by Domain Architect