Brazil Posted September 28, 2014 Share Posted September 28, 2014 I have recently had my car back on the road after sitting for almost 2 years getting a single turbo install and tonight when going for a short drive I am hearing a grinding sound from the rear and a rattle from the trunk which I am thinking its from vibrations. Also when I had the car a ramp to get the car aligned it was pointed out to me that there was oil leaking from seals where the diff mates with the drive shaft? What do you guys think the issue could be? Quote Link to comment Share on other sites More sharing options...
Al Massey Posted September 29, 2014 Share Posted September 29, 2014 The rattle from the trunk is most likely your boot seals are worn. New seals should/will cure that. The grinding I can't help with but if you are leaking oil from the diff I would get the oil checked/changed and a new seal there too Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 The rattle from the trunk is most likely your boot seals are worn. New seals should/will cure that. The grinding I can't help with but if you are leaking oil from the diff I would get the oil checked/changed and a new seal there too I have new boot seals, I will check them out but the rattle only accurs when I hear the grinding sound. Quote Link to comment Share on other sites More sharing options...
Kaan W Posted September 29, 2014 Share Posted September 29, 2014 I had a vibrating diff on the work van just before it went pop! Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 I had a vibrating diff on the work van just before it went pop! Yes, I stopped driving as soon as I heard it I am waiting for the closest garage to open so we can get it up on a ramp and investigate further. Quote Link to comment Share on other sites More sharing options...
listy Posted September 29, 2014 Share Posted September 29, 2014 I think when Al says "boot seals" he means "boot rubbers" (the rubber blocks that stop the boot lid rattling) Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 29, 2014 Share Posted September 29, 2014 If the diff has lost its oil it wont last long before its knackered i'm afraid Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 If the diff has lost its oil it wont last long before its knackered i'm afraid I stopped as soon as it started to make the sound, and its not making the sound all the time so I have given its best chance of fixing something before it gets worst so will just have to see. Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 29, 2014 Share Posted September 29, 2014 By the time you hear the noise the damage is usually done i'm afraid Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 29, 2014 Share Posted September 29, 2014 Get a clean container, loosen the fill plug on the diff and then undo the drain plug, see how much oil comes out and what state it's in Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 Get a clean container, loosen the fill plug on the diff and then undo the drain plug and see how much oil comes out and what state it's in The oil should be new since it was changed during the project. Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 29, 2014 Share Posted September 29, 2014 (edited) The oil should be new since it was changed during the project. If you have been losing diff oil you need to see how much is actually in the diff, if the diff has suffered premature wear due to lack of oil then there could be particles of metal in the oil Check this but i think it should have 1.5 litres in it Edited September 29, 2014 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 I also have an ABS light on, it has been on since I took the car from the shop but could this implicate with my problems? Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 29, 2014 Share Posted September 29, 2014 (edited) I have recently had my car back on the road after sitting for almost 2 years getting a single turbo install and tonight when going for a short drive I am hearing a grinding sound from the rear and a rattle from the trunk which I am thinking its from vibrations. Also when I had the car a ramp to get the car aligned it was pointed out to me that there was oil leaking from seals where the diff mates with the drive shaft? What do you guys think the issue could be? I'd be checking this first as the oil can only come from the diff, if your getting it on a ramp it'll only take a few minutes to drain it and then you'll know exactly how much oil its lost etc Even if this isn't the cause of the noise the leak needs fixing Edited September 29, 2014 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Konrad Posted September 29, 2014 Share Posted September 29, 2014 3 things to check really - rear discs/brakes - as they can start vibrating when warped/corroded, differential - as you are loosing oil from it and finally propshaft balance - if it was taken off and seperated. Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 I went to a local garage but his ramp was too steep and i cant get on it, typical Portuguese garage design...! Any how here is photo, can anybody confirm that they are very confident that oil leaked and once i hear the noise coming of throttle its good bye diff? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 29, 2014 Share Posted September 29, 2014 That doesn't look like 1.5 litres of oil has come out. 1.5 litres would make a real mess underneath. Check rear hub bearings aren't breaking up, ceck oil as dnk said, be SURE to see the filler plug will come out BEFORE you drain it.... How many hours did it run on the rolling road before mapping? Any oil around the rollers? Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 29, 2014 Share Posted September 29, 2014 Sounds like the diff may be on its way out, small facelift diffs don't like single turbo power, I'd change to a big case diff. Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 (edited) That doesn't look like 1.5 litres of oil has come out. 1.5 litres would make a real mess underneath. Check rear hub bearings aren't breaking up, ceck oil as dnk said, be SURE to see the filler plug will come out BEFORE you drain it.... How many hours did it run on the rolling road before mapping? Any oil around the rollers? The rear bearings where replaced with new ones the only time they would of got used is on the dyno. Also it only makes noise when i let of the throttle, sometimes it goes away for short period of times. The car makes no noise when making full lock circles. Edited September 29, 2014 by Brazil (see edit history) Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 Sounds like the diff may be on its way out, small facelift diffs don't like single turbo power, I'd change to a big case diff. What is all I need to upgrade the diff? Big case diff, drive shafts and axles? What bushings do you recommend Super bro or OEM? Quote Link to comment Share on other sites More sharing options...
jazz1 Posted September 29, 2014 Share Posted September 29, 2014 Why don't you upgrade to TRD or Giken diff? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 29, 2014 Share Posted September 29, 2014 The TRD and Giken LSD is but a small part of the whole assembly. If the crown wheel or pinion, is damaged, or a bearing has spun in the case he will need a complete assembly. For sure, once he has the big case and internals a Giken LSD centre section would be very nice! Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 29, 2014 Share Posted September 29, 2014 What is all I need to upgrade the diff? Big case diff, drive shafts and axles? What bushings do you recommend Super bro or OEM? Diff, prop and driveshafts. I'd use OEM bushes. Quote Link to comment Share on other sites More sharing options...
Brazil Posted September 29, 2014 Author Share Posted September 29, 2014 Diff, prop and driveshafts. I'd use OEM bushes. Do you have TRD LSD on yours? Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 29, 2014 Share Posted September 29, 2014 Not in the Goose, I've fitted a couple TRD a lsd's to previous Supra's, but I didn't feel any difference with them tbh. If Chris recomends the giken as good, I'd probably go with that over a TRD. Quote Link to comment Share on other sites More sharing options...
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