Scooter Posted March 7, 2015 Share Posted March 7, 2015 Ok bit of a long story and pics to follow, but I have a NA that I'm refreshing and generally having a tinker with. I removed the diff as I've had a trd one (from ebay) in the garage for some time and I also wanted to find out what LSD was currently in the car. Anyhow on comparison the diff casings are identical, but the drive shaft flanges aren't so it's overall a bit narrower and also the trd one has larger bolt holes for the driveshafts ie my na bolts just slide in the holes. I think all small case diff's from supras are interchangeable bar the prop flange? So I'm wondering if anyone knows what it may have come from? The diff that came out has in and out play in one side bearing and so I'm looking for advice on whether to rebuild this non trd one as it has the correct drive shaft flanges and sell the trd once I know what car it's from. Or perhaps get the trd rebuilt with the correct drive shaft flanges? Pics to follow Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 7, 2015 Author Share Posted March 7, 2015 ok first up the insides and flanges of the diff that came of my NA........is it possibly a Tomei diff? I have no reason to think these drive shaft flanges aren't standard NA ones. Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 7, 2015 Author Share Posted March 7, 2015 (edited) Pics of the TRD internaled 'other' diff. As I said all looks identical casing wise (see pic?), I measured the prop flange and that's standard NA sizing too, it's just these drive shaft flanges that are different.....any help appreciated. NB in the side by side pic the right hand side one is the one direct off the NA today, the left the ebay purchased mystery diff. Edited March 7, 2015 by Scooter (see edit history) Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 7, 2015 Author Share Posted March 7, 2015 Wondering what toyota vehicle would have the same casing but use larger/meatier drive shaft bolts? Quote Link to comment Share on other sites More sharing options...
jot_ie Posted March 7, 2015 Share Posted March 7, 2015 NA driveshaft flange bolts 8mm TT driveshaft flange bolts 10mm Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted March 7, 2015 Share Posted March 7, 2015 Wondering what toyota vehicle would have the same casing but use larger/meatier drive shaft bolts? Aristo? Soarer? Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 8, 2015 Author Share Posted March 8, 2015 NA driveshaft flange bolts 8mm TT driveshaft flange bolts 10mm never knew that cheers, presumably I could get some tt drive shafts and the other diff I have would then bolt straight up? Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 9, 2015 Author Share Posted March 9, 2015 ok the unknown diff has 12mm bolt holes on the flange!? The other diff has 10mm bolt holes and the driveshaft holes won't take a 12mm bolt. So does any know what the diff might be from? Quote Link to comment Share on other sites More sharing options...
David P Posted March 9, 2015 Share Posted March 9, 2015 Swap the flanges. Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 9, 2015 Author Share Posted March 9, 2015 (edited) David, with the flange bolts to the casing undone should the flanges just pull out? I loosened one and got a small gap but was giving up for the day so didn't try 'much' persuasion and was worried about disturbing the side seals. Ok I've read the manual, not sure why I didn't look before! They 'just' pull off do that's my job for tomorrow evening..... Edited March 9, 2015 by Scooter (see edit history) Quote Link to comment Share on other sites More sharing options...
David P Posted March 10, 2015 Share Posted March 10, 2015 Confirm that the diff is the ratio you require. If you don't know what it is............ Lock one side, turn prop flange and count how many prop revolutions = 1 wheel revolution. That will get you close enough to identify it from the Supra diff ratios available. Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 10, 2015 Author Share Posted March 10, 2015 thanks David, when I first got it I checked a trd was inside, I checked the prop flange size as I knew these were different NA to TT and I did count the teeth to ascertain the ratio which I'm sure (but i'll double check before resealing!) was the NA ratios and so given all this pointing to a normal NA diff and that it was sold on ebay as a supra diff I completely overlooked/didn't think to even check the driveshaft flange holes....typical but all part of the learning curve - check everything! Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 10, 2015 Author Share Posted March 10, 2015 Ok phew, flanges swapped and all ready to pop back in hopefully with no further problems! Thanks all Quote Link to comment Share on other sites More sharing options...
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