Batman Posted November 18, 2017 Share Posted November 18, 2017 So while I had my spitfire stood in the garage I noticed a couple of drops of oil coming from the differential, so since I am doing a full nut and bolt rebuild thought I'd have a look.I've bought a diff overhaul kit, since the bearings will have to come off to replace the seals.(In my experience you can damage the bearings sometimes when removing them, and they're not overly expensive)Given the diff a quick scrub (Will clean it better and paint later).1st question, since I don't appear to have a socket that fits 🙁 what size is the nut on the input shaft? Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted November 18, 2017 Share Posted November 18, 2017 I'm not certain... I think the nut is 5/8 which would make the spanner/socket 15/16". So 24mm might fit if I'm right. I'd need to check though. Quote Link to comment Share on other sites More sharing options...
Batman Posted November 18, 2017 Author Share Posted November 18, 2017 Got one of those, so it's bigger than that. It measures 28ish mm. Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted November 18, 2017 Share Posted November 18, 2017 Hmmm non-standard head size... 1 1/16" maybe? Sorry I don't know for sure. Quote Link to comment Share on other sites More sharing options...
Batman Posted November 18, 2017 Author Share Posted November 18, 2017 No me neither, I'll have another go at measuring it tomorrow. Thanks anyway mate(Just checked, Google says 1 1/8 is about 28.5mm, was sure I had that socket! Time for a hunt ) Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted November 18, 2017 Share Posted November 18, 2017 1 1/8" is 28.575mm and for some reason I have one of those in my tool box. Quote Link to comment Share on other sites More sharing options...
toolmaker Posted November 19, 2017 Share Posted November 19, 2017 any chance you can do a few photos of the job, I have a few diffs for my gt6 and I know one of them needs bearings so a few pics would be interesting.I note from mine that older diffs have a split pin to lock the nut while newer ones have a nylon locknut. don't know the thread without going out to check though. Quote Link to comment Share on other sites More sharing options...
Batman Posted November 19, 2017 Author Share Posted November 19, 2017 Will do.Mine has what looks like a nylock type nut.Elin on YouTube has also done this job Quote Link to comment Share on other sites More sharing options...
drofgum Posted November 19, 2017 Share Posted November 19, 2017 Batman,Your differential unit has a crush sleeve spacer inside. It is important to put the nut back exactly where it is. To do so mark the nut, flange and shaft before you take anything apart. Then as you undo the nut count the turns including any partial turn. When reassembling put the nut back on the exact same number of turns. That should put all of your original marks back where they started. Good luck, Paul Quote Link to comment Share on other sites More sharing options...
Batman Posted November 19, 2017 Author Share Posted November 19, 2017 So made a start before lunchRemoved nut (was 1 1/8 ) Got this kit from ANG Quote Link to comment Share on other sites More sharing options...
Batman Posted November 19, 2017 Author Share Posted November 19, 2017 Removed front mounting plate Quote Link to comment Share on other sites More sharing options...
Batman Posted November 19, 2017 Author Share Posted November 19, 2017 Then removed drive flanges (Will need to remove the bearings and then get to the seals)Then split the case Quote Link to comment Share on other sites More sharing options...
Batman Posted November 19, 2017 Author Share Posted November 19, 2017 Kept the bearings and shims together on the diff.Then removed the pinion Quote Link to comment Share on other sites More sharing options...
Batman Posted November 19, 2017 Author Share Posted November 19, 2017 Then knocked out the pinion bearing and seal (there are cut outs in the case so you can knock it out) Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted November 19, 2017 Share Posted November 19, 2017 I had to utterly destroy the bearings to get them off the shafts when I did the seals on mine! Quote Link to comment Share on other sites More sharing options...
Batman Posted November 19, 2017 Author Share Posted November 19, 2017 Quoted from yorkshire_spam I had to utterly destroy the bearings to get them off the shafts when I did the seals on mine! Expecting to do the same, so I bought a new set Quote Link to comment Share on other sites More sharing options...
Batman Posted December 27, 2017 Author Share Posted December 27, 2017 Well the bearings came off relatively easily (3 leg puller used).Worst job was getting the new bushes in the rear of the diff, took a bit of buffing of the bush and the diff case before they would press in.Gave the case a quick lick of paint and replaced all of the bolts Quote Link to comment Share on other sites More sharing options...
Clive Posted December 27, 2017 Share Posted December 27, 2017 Just one point, and I could be wrong on this, but are the bolts that hold the rear case tapered? I have seen more than one diff where they have been replaced by "normal" bolts, but that concerns me, they would be tapered for a good reason.....Location? Stay tight? not sure, but a thought. Quote Link to comment Share on other sites More sharing options...
Batman Posted December 27, 2017 Author Share Posted December 27, 2017 The ones that came off were shoulder bolts, but not tapered as were the new ones. Did double check (been caught out like that before).They were all fitted with spring washers same as the originals.Thanks for checking though (never know when I'll miss something lol) Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted December 27, 2017 Share Posted December 27, 2017 It's the 4 bolts that hold the front mount to the nose which have tapered shanks.Nick Quote Link to comment Share on other sites More sharing options...
Clive Posted December 27, 2017 Share Posted December 27, 2017 Thanks Nick. I knew they were somewhere..... but it has been a very long time since I stripped a (Triumph) diff. Quote Link to comment Share on other sites More sharing options...
Batman Posted December 27, 2017 Author Share Posted December 27, 2017 Quoted from Nick Jones It's the 4 bolts that hold the front mount to the nose which have tapered shanks.Nick I'll be honest and say I didn't notice, but I used the originals on that so looks like I got lucky there ! Quote Link to comment Share on other sites More sharing options...
Guppy916 Posted January 2, 2018 Share Posted January 2, 2018 Happy new year every body, I got TLD to rebuild my diff and gearbox, it took a couple of weeks and he did a fantastic job, which was cheaper then a recon diff from RB's , so i still have the correct numbers on the gearbox and diff, MK3 GT6 1972, Quote Link to comment Share on other sites More sharing options...
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