Guest Posted May 7, 2008 Share Posted May 7, 2008 Do the real deal if necessary. I think many would rip off the diff and subframe to fix the problem right (I would). Link to comment Share on other sites More sharing options...
Turninconcepts Posted May 7, 2008 Share Posted May 7, 2008 Do the real deal if necessary. I think many would rip off the diff and subframe to fix the problem right (I would). have you tried to rip it off yet? Those Indiana farm boys building these things take a torque spec and quadruple it. Link to comment Share on other sites More sharing options...
NewScooby Posted May 7, 2008 Share Posted May 7, 2008 yeah - I saw that. I was just emphasizing that inserts I think are the best bet on this so far. Turn in Concept's 08 STI is one sexy ride. I saw it out on track at Autobahn Country Club the end of last month. I've got my bushings filled with the poly goo and 70% or more of the NVH is gone with this fix. I'm actually considering removing the rear suspension and subframe (if this can be done with all bolts) and having a local machine shop create some solid aluminum or delrin bushings for the rear diff carrier and control arm bushings. Link to comment Share on other sites More sharing options...
SeeeeeYa Posted May 8, 2008 Share Posted May 8, 2008 Turn in Concept's 08 STI is one sexy ride. I saw it out on track at Autobahn Country Club the end of last month. I've got my bushings filled with the poly goo and 70% or more of the NVH is gone with this fix. I'm actually considering removing the rear suspension and subframe (if this can be done with all bolts) and having a local machine shop create some solid aluminum or delrin bushings for the rear diff carrier and control arm bushings. While the 'poly goo' is some really great stuff and makes this mod possible, in my experience it isn't enough alone to do the job here. I tried a variety of things before coming up with what worked best for me; the PVC inserts I described earlier, all then molded together with the poly goo. Because of how well the poly really works, however, once you have it firmly in there removing it to do something else, like put some solid inserts in, may prove VERY difficult to impossible. Therefore, think hard about what to do. The PVC inserts I used are incredibly easy to fashion, requiring but minutes with a hacksaw to cut. It is that messy goo that's the pain , requiring one's fingers to properly fill, shape and mold things properly. And, DO NOT MOVE THE CAR FOR ONE FULL DAY AFTERWARD. It takes longer for the poly to harden, but you can drive it, CAREFULLY, after a day. Two days is even better. If you rush it, and drive before the poly has hardened enough, the mod will not be wholly effective. For me, that was a tough thing to do.... modify the car and let it sit for a couple of days, but I did. Later I did the same thing to my rear LCA front bushings. They are a lot harder to do and get to, but are a necessity to do. Finally, I installed Rallitek's original (large!!), hard, transmission support insert (for my 5EAT). I no longer have the driveline noises that plagued me for over two years, and I have a lot more horsepower now. (Those "noises" were the result of driveline movement I am convinced broke my rear diff and, possibly, rear axel.) No need to rip things out (although I did a lot of ripping out along the way ) On that subject of removing the rear subframe so aftermarket bushings can be installed: any manufacturer who is silly enough to market one will lose money. If you've ever replaced such a bushing, like I did with the front LCA bushings, you know the degree of difficulty involved. If people think a little PVC and 3M WS Poly is tough..... try multiplying that a few dozen times. Furthermore, the rear diff bushings are but PART of the solution, you'ld need ones for the rear LCA's front bushings as well.... etc. As far as solid bushings, I don't think anyone wants to do that. Unless one has a track only vehicle, totally modified for the purpose, solid bushings would be too punishing. As it is, these more firm bushings changed the nature of my car, NVH wise. Just having a car that works without protesting, however, makes it well worth it to me. Finally, if an aftermarket insert, like the one for the transmission mount, could be crafted of a hard enough material and filled the spaces in the bushing(s) (remember the LCA) it might work. But then, so does a little PVC and some goo . Link to comment Share on other sites More sharing options...
Turninconcepts Posted May 14, 2008 Share Posted May 14, 2008 Interesting discovery today - Pulled the cradle mount of the 08 to take a look. Seems the bushings on each side are different. One is solid, and the other has voids. IIRC, the LGT bushings are the same with voids on each side. Pics coming soon. Link to comment Share on other sites More sharing options...
Leonardo Posted May 14, 2008 Share Posted May 14, 2008 Please do but do you mean solid compared to having the gaps on top and bottom? Wonder if we can use Impreza bushings. Link to comment Share on other sites More sharing options...
Turninconcepts Posted May 14, 2008 Share Posted May 14, 2008 Please do but do you mean solid compared to having the gaps on top and bottom? Wonder if we can use Impreza bushings. I mean solid compared to having no gaps on one side, and the other has very thin gaps. I have new new 2008 Group N catalog. I will check for replacements there. OD and tube thickness seems to be around 55mm. If someone has their legacy apart currently can they measure width. I believe they are around the same. Link to comment Share on other sites More sharing options...
Leonardo Posted June 12, 2008 Share Posted June 12, 2008 bump for updates. Should we all report the problem? Link to comment Share on other sites More sharing options...
Leonardo Posted July 2, 2008 Share Posted July 2, 2008 bompus! Link to comment Share on other sites More sharing options...
mccorry Posted July 2, 2008 Author Share Posted July 2, 2008 I haven't had the issue recently due to the warm weather. Link to comment Share on other sites More sharing options...
Leonardo Posted July 2, 2008 Share Posted July 2, 2008 Bah, mine does it in 90º weather. Guess I have too much powa! Link to comment Share on other sites More sharing options...
mccorry Posted July 2, 2008 Author Share Posted July 2, 2008 Link to comment Share on other sites More sharing options...
LittleBlueGT Posted July 2, 2008 Share Posted July 2, 2008 Bah, mine does it in 90º weather. Guess I have too much powa! I was making it too in 95F. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
SeeeeeYa Posted July 2, 2008 Share Posted July 2, 2008 And I do not make the noise anymore, in any temperature or under any circumstance...... Where once the wheel hop and driveline flailing, directly or indirectly, caused failure of a rear diff and a rear axel, the car now does what it's asked without complaint. Most was eliminated by my rear diff bushing mods. The rest went after I modified the rear lower control arms' front bushings, and installed the Rallitek transmission support insert. Link to comment Share on other sites More sharing options...
mccorry Posted July 3, 2008 Author Share Posted July 3, 2008 Man.... I dread doing that work. Bushing work sucks! Link to comment Share on other sites More sharing options...
SeeeeeYa Posted July 3, 2008 Share Posted July 3, 2008 Man.... I dread doing that work. Bushing work sucks! Word! Nothing about it is easy. But the rewards are worth it...... or were for me. Link to comment Share on other sites More sharing options...
sub20gt Posted July 17, 2008 Share Posted July 17, 2008 i have that problem too... its like the tire sliping on the road, but i only get it when m makin a turn on a junction (has to be in the first or second gear) Link to comment Share on other sites More sharing options...
sub20gt Posted July 17, 2008 Share Posted July 17, 2008 have you guys ever cheked the diff oil? i was running on low for about a month.... luky to have found it, its opposite the ATf dip stick Link to comment Share on other sites More sharing options...
mccorry Posted July 17, 2008 Author Share Posted July 17, 2008 Yes... not a low differential oil issue. I've had it with two different oils as well. Link to comment Share on other sites More sharing options...
wagonmaster87 Posted August 6, 2008 Share Posted August 6, 2008 My 05 MT LGT was making a noise from the rear also, I got a letter from subaru saying there was a recall on the wheel bearings, took it in they replaced them, no more noise. It was almost like a loud humming noise. Link to comment Share on other sites More sharing options...
mccorry Posted August 6, 2008 Author Share Posted August 6, 2008 Recall on the wheel bearings????? More info or link? Link to comment Share on other sites More sharing options...
SeeeeeYa Posted August 6, 2008 Share Posted August 6, 2008 Recall on the wheel bearings????? More info or link? You haven't heard about this? I hadn't either but Subaru sent me some paperwork and later paid me every cent I paid, about two years ago!, to get one of my rear wheel bearings replaced. I'd decided to get someone I trusted to replace it instead of the local "dealership," who had demonstrated their incompetence. I willingly paid out of pocket for it. All I had to do to get reimbursed was provide copies of my receipts along with Subaru's paperwork. Amazed me. There isn't any TSB # on the letter they sent me. As a registered owner of a "2005 or 2006" I was being notified that either one or both of my rear wheel bearings could be bad........etc. They advised that the warranty coverage for my rear wheel bearings was being extended to "8 years (96 months) or 100,000 miles, whichever occurs first." "Subaru of America, Inc Attention: Legacy/Outback Rear Wheel Bearing Extended Warranty Program P.O. Box 6000 Cherry Hill, NJ 08034-6000" Link to comment Share on other sites More sharing options...
SBT Posted August 6, 2008 Share Posted August 6, 2008 (edited) It's under Subaru TSB 03-58-08. Here's crappy jpegs as the TSB is too large to upload by itself. Here's also a link, but it's going down shortly so get it while you can. TSB 03-58-08 Edited August 6, 2008 by SBT - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
mccorry Posted August 6, 2008 Author Share Posted August 6, 2008 Thanks guys.... hopefully I won't need the extra coverate time... but it's nice to know that it is there. Link to comment Share on other sites More sharing options...
whitetiger Posted August 11, 2008 Share Posted August 11, 2008 For the people who thik its diff related (like me), i found somthing interesting on japanparts.com in the handling and braking section. A reinforced diff member. http://www.japanparts.com/images/ImageFromDB.php?base=1&no=15720 Maybe this will help solve the issue. Link to comment Share on other sites More sharing options...
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