Darren Groves Posted November 13, 2018 Report Share Posted November 13, 2018 Is there any practical way of bench testing a J Type Overdrive? Darren Link to comment Share on other sites More sharing options...
Nick Jones Posted November 13, 2018 Report Share Posted November 13, 2018 Have done them in the past while still attached to the gearbox by spinning the gearbox with an electric drill. You drill needs to be 600W+! Once off the 'box it becomes trickier. Nick 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 13, 2018 Report Share Posted November 13, 2018 J types seem generally good the solenoid is best stripped and check the body 0 rings and remove the 10mm circlip inside the sol valve body and check the loose 0 ringed spool piston inside is ok and rattles back and forth when you shake it These can with age become sluggish and gives the OD a mind of its own Needs a thin 1"af spanner to unscrew the solenoid, dont use grips on the body , you can wreck it. Not many places mention the little sod hidding inside the main sol body. Dont see a way to tested the OD on its own , and if you try to test a gearbox it must be driven from the mainshaft as synchros have to spin up the clutch disc not the otherway round Pete 1 Link to comment Share on other sites More sharing options...
Darren Groves Posted November 29, 2018 Author Report Share Posted November 29, 2018 As the OD unit is of unknown heritage I thought I'd take it apart to see if there were any obvious problems. This is the cone clutch, what is the thoughts on the condition of the lining material. Good enough to go again or best to replace? Sorry the pictures aren't great, the lighting was poor when I took them. Darren Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 29, 2018 Report Share Posted November 29, 2018 Looks ok , will have alook tomorrow see if there are any dimensions to use as a check Pete Link to comment Share on other sites More sharing options...
Clive Posted November 29, 2018 Report Share Posted November 29, 2018 Looks OK to me, but Pete may find a thickness measurement... Link to comment Share on other sites More sharing options...
Darren Groves Posted January 7, 2019 Author Report Share Posted January 7, 2019 I decided to get the cone clutch relined by a local company, it's come back a looks a lot thicker than before around 4.5mm, I can't remember what it was previously but I seem to recall it was under 2mm, but I can't be sure. I did mention to the guy when I collected it looked thick, but he said they've done them before and that's how it's supposed to be, but just doesn't feel right to me. What's the general consensus on whether I should just fit or get it redone? Darren Link to comment Share on other sites More sharing options...
Guest Posted January 7, 2019 Report Share Posted January 7, 2019 Hello Darren, That does look a tad thick, not certain it was that thick when I looked at some on various reconditioning companies at the NEC in November. Not sure if these photos will assist, but may give an indication as to depth - they are from my Vitesse prior to being rectified. Best wishes. Richard. Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 8, 2019 Report Share Posted January 8, 2019 And the new lining has a awful lot of fuzz A call to dave twigger at od spares rugby will give you the lining dimensions Pete Link to comment Share on other sites More sharing options...
Darren Groves Posted January 8, 2019 Author Report Share Posted January 8, 2019 10 hours ago, Pete Lewis said: A call to dave twigger at od spares rugby will give you the lining dimensions Thanks Pete, I spoke to Dave, he's a very helpful guy. For those that need the information, the measurement from the outside to outside of the inner & outer lining on a J Type OD should be 0.285", mine is almost double that so would never have gone back together. The process is to fit an overthick lining then machine back to the correct thickness, so the company that done it for me are going to take it back and do it. Darren Link to comment Share on other sites More sharing options...
rogerguzzi Posted January 16, 2019 Report Share Posted January 16, 2019 On 13/11/2018 at 10:19, Darren Groves said: Is there any practical way of bench testing a J Type Overdrive? Darren Hello Darren This is how I did mine and will do again as you can test the pressure and adjust if necessary if was a TR etc it will be to high http://buckeyetriumphs.org/technical/jod/JOD4/JOD4.htm £30,000 miles ago but out again for oil leaks I will fit all new bearings, o/rings and seals and to gearbox Its all in bits all over the bench every bit removed and cleaned. Just waiting for some parts Roger ps I have a gauge if you want to borrow it? Link to comment Share on other sites More sharing options...
rogerguzzi Posted January 17, 2019 Report Share Posted January 17, 2019 On 08/01/2019 at 19:14, Darren Groves said: Thanks Pete, I spoke to Dave, he's a very helpful guy. For those that need the information, the measurement from the outside to outside of the inner & outer lining on a J Type OD should be 0.285", mine is almost double that so would never have gone back together. The process is to fit an overthick lining then machine back to the correct thickness, so the company that done it for me are going to take it back and do it. Darren Hello Darren I am glad you put the dimension of the over drive linings on here as I was wondering about mine. I have measured it now and it is 0.288" to 0.290" and looks in good condition so can go back in with no real worries Thank's Roger Link to comment Share on other sites More sharing options...
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