bxhunt Posted June 9, 2019 Share Posted June 9, 2019 Any help please with a couple of questions?1. What grade of oil do I use in my de Dion LSD back axle?2. Any easy way to undo the filler plug as it appears to be baulked by the de Dion tube?Thanks,Barry Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted June 9, 2019 Member Share Posted June 9, 2019 Any easy way to undo the filler plug as it appears to be baulked by the de Dion tube?You can expose it by playing with the suspension with a jack.What grade of oil do I use in my de Dion LSD back axle?Do you know any more about which LSD you have?Jonathan Link to comment Share on other sites More sharing options...
bxhunt Posted June 9, 2019 Author Share Posted June 9, 2019 I assume it's the original axle on a 1994 HPC race car. There don't appear to be any identification marks so I am guessing.Barry Link to comment Share on other sites More sharing options...
Wrightpayne Posted June 9, 2019 Share Posted June 9, 2019 If it has a plate LSD then Castrol B373.you can suck the oil out with an oil syringe / oil extraction vacuum pump from above with the boot floor out.Re plug access, as Jonathan says play around with the jack - maybe best with the dedion on full droop! Link to comment Share on other sites More sharing options...
Roadsport06 Posted June 9, 2019 Share Posted June 9, 2019 Just to add, if you do drain the oil then after a spirited drive will warm up the oil making it easier to suck out. Link to comment Share on other sites More sharing options...
bxhunt Posted June 9, 2019 Author Share Posted June 9, 2019 That's great. Thank you all. Link to comment Share on other sites More sharing options...
DaveMorris Posted June 15, 2019 Share Posted June 15, 2019 .. .. and if it not a plate type LSD .. .. ?? Link to comment Share on other sites More sharing options...
Wrightpayne Posted June 16, 2019 Share Posted June 16, 2019 I have a Quaiffe ATB in a Sierra diff and run ford EP90 oil (available at dealerships for the Ranger).Jason Fletcher wrote an interesting post on sierra diffs and oil a while ago - its in the archives. Link to comment Share on other sites More sharing options...
ECR Posted June 16, 2019 Share Posted June 16, 2019 Just for interest .... When I asked Quaiffe for recommendations for ATB oil: Feb 2009: Please use either the standard oil as recommended by the manufacturer of your vehicle or Silkolene Silktran Syn 5 (Fully synthetic API GL4/5 SAE 75W/90). I now run a ZF plate type LSD. Road and Race who built the diff suggest that Oil for ZF LSD is: Comma Gear Oil Limited Slip – LS80W-90 – GL5 Link to comment Share on other sites More sharing options...
grumpy the 7th Posted June 16, 2019 Share Posted June 16, 2019 jacking up and down is time consuming and when lowering the car down to check the oil level after removal of the hex plug the oil usually runs out (don't ask)!! Boot floor out and 3/4" of 10mm (IIRC) hex key with a ring spanner and a bit of flexi piping to top up (when the car is level)That reminds me of the lady who went into a motorfactors to buy a new 'seven hundred and ten' cap. Only to be told she'd got the original cap upside down Link to comment Share on other sites More sharing options...
ECR Posted June 16, 2019 Share Posted June 16, 2019 I got there eventually ...... Link to comment Share on other sites More sharing options...
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