Grant Coulson Posted May 11, 2019 Report Share Posted May 11, 2019 I live in Kent a few minutes from Brands Hatch. I am looking for a reliable mechanic to remove the diff on my 1975 TR6. The diff itself is working well but the oil leak has gradually got worse to the point were I have to top it up twice a year using almost a litre each top up. I feel I have pushed my luck far enough and the time has come for a complete overhaul on the rear end. I would be most grateful if anyone recommend a mechanic or garage in my area. Although I have had the 6 for over twenty years I have been lucky enough not to have any major mechanical work carried out on the car. I have attached a photo of my pride and joy Kind regards Grant Coulson Quote Link to post Share on other sites
Steves_TR6 Posted May 11, 2019 Report Share Posted May 11, 2019 Car looks very original and nice Grant! Quote Link to post Share on other sites
rcreweread Posted May 11, 2019 Report Share Posted May 11, 2019 Grant Which seal is leaking - front or rears? If the leak is that bad, you may find you will need to replace the offending flange as it could be leaking because the seal surface is worn or corroded and no amount of seal replacement will cure that. Cheers Rich Quote Link to post Share on other sites
Steves_TR6 Posted May 11, 2019 Report Share Posted May 11, 2019 A few years ago i replaces all three seals on my tr6 diff, not too difficult apart from separating the tapers : steve Quote Link to post Share on other sites
RogerH Posted May 11, 2019 Report Share Posted May 11, 2019 Hi Grant, the TRAction page 2 shows Maidstone Sports Cars 01622 890233 never used them but worth a call surely. Roger Quote Link to post Share on other sites
Graham J Posted May 12, 2019 Report Share Posted May 12, 2019 Did the UK not get the raised bumpers and rubber overriders in 75? Graham Quote Link to post Share on other sites
BlueTR3A-5EKT Posted May 12, 2019 Report Share Posted May 12, 2019 6 hours ago, Graham J said: Did the UK not get the raised bumpers and rubber overriders in 75? Graham Thankfully no. Only NAS markets. cheers Peter W Quote Link to post Share on other sites
Mark Ogram Posted May 12, 2019 Report Share Posted May 12, 2019 I had the same problem last year. It was the breather that was blocked, worth checking that first before spending major money. Mark. Quote Link to post Share on other sites
Grant Coulson Posted May 13, 2019 Author Report Share Posted May 13, 2019 Thanks very much for all your replies. Rich, It is coming from the rear but as you know it's very difficult to actually see exactly which seal without getting it up on ramps, it might be more than one seal. Steve, its a job I would not take on myself, I have very limited engineering skills. Roger, that's a good shout, I'll give Maidstone a call. Mark, I was unaware the diff had a breather, having looked at diagrams i will now have a fiddle around. I might be lucky but as the leak has been around for years I would imagine the seals will have been blown by the pressure should the breather be blocked. Thanks again for all your input. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted May 13, 2019 Report Share Posted May 13, 2019 Consider fitting a Speedi-sleeve to the input flange seal area if it is grooved. size SKF 99149 https://www.ebay.co.uk/itm/99149-SKF-Speedi-Sleeve/222282904862?hash=item33c117f51e:g:Ef0AAOSwTmtantGK&frcectupt=true Cheers Peter W Quote Link to post Share on other sites
Mark Ogram Posted May 15, 2019 Report Share Posted May 15, 2019 On 5/13/2019 at 8:13 PM, Grant Coulson said: Thanks very much for all your replies. Rich, It is coming from the rear but as you know it's very difficult to actually see exactly which seal without getting it up on ramps, it might be more than one seal. Steve, its a job I would not take on myself, I have very limited engineering skills. Roger, that's a good shout, I'll give Maidstone a call. Mark, I was unaware the diff had a breather, having looked at diagrams i will now have a fiddle around. I might be lucky but as the leak has been around for years I would imagine the seals will have been blown by the pressure should the breather be blocked. Thanks again for all your input. Hi Grant, I had leaks from the driveshaft seals and pinnion seal, once I cleared the breather I have had no leaks at all. Cheers. Mark. Quote Link to post Share on other sites
DRD Posted May 17, 2019 Report Share Posted May 17, 2019 Overfilling can cause similar problems as well. Daz Quote Link to post Share on other sites
Sapphire72 Posted May 17, 2019 Report Share Posted May 17, 2019 (edited) Here are photos of the breather pin, top & inside views. Capacity of the entire differential is 1.42 liters. If you raise the rear end with a trolley jack centered under the diff (with supports under the chassis), or, even drive it up on some wood boards- you could slide yourself underneath to have a look at where it is leaking from. This way you could be more knowledgeable when you approach the repair shop. Cheers Walt Edited May 17, 2019 by Sapphire72 Quote Link to post Share on other sites
The horseman Posted May 19, 2019 Report Share Posted May 19, 2019 I would recommend Hardy Engineering of Leatherhead, having used them for a number vehicles, including at various times a TR6 gearbox, overdrive and differential. They are classic car transmission experts and have the facilities to remove your differential, check its condition and rebuild/repair as necessary. In my experience they will do this without without carrying out un-necessary work. Leatherhead is of course not too far from Brands Hatch. Ian Quote Link to post Share on other sites
Rogcastle Posted May 19, 2019 Report Share Posted May 19, 2019 Talking of over filling what is the correct capacity for a TR6 Axle. I have the original handbook for a 1975 which states 1.27 litres, a Bentley manual which states the same and a Haynes manual which states 1.42 litres. I assume 1.27 is correct? Can anyone solve the riddle . The Bentley manual does mention1.42 for a pre 1970 USA model! Maybe that is the answer. Roger Quote Link to post Share on other sites
Sapphire72 Posted May 20, 2019 Report Share Posted May 20, 2019 Roger, here's the specs from the Triumph Owners Workshop Manual. Cheers, Walt Quote Link to post Share on other sites
Waldi Posted May 20, 2019 Report Share Posted May 20, 2019 I fill it until oil pours out, the filler opening is also the required level. Waldi Quote Link to post Share on other sites
astontr6 Posted May 20, 2019 Report Share Posted May 20, 2019 22 hours ago, The horseman said: I would recommend Hardy Engineering of Leatherhead, having used them for a number vehicles, including at various times a TR6 gearbox, overdrive and differential. They are classic car transmission experts and have the facilities to remove your differential, check its condition and rebuild/repair as necessary. In my experience they will do this without without carrying out un-necessary work. Leatherhead is of course not too far from Brands Hatch. Ian +1 They are known to be the DB's for transmission work in the S,E. for all marques, this is where I would go! In my view diff work is a precision job well beyond most classic car workshops! Bruce. Quote Link to post Share on other sites
Mike C Posted May 20, 2019 Report Share Posted May 20, 2019 1 hour ago, Waldi said: I fill it until oil pours out, the filler opening is also the required level. Waldi I do that as well with the car level, but I've never known how much is needed for a total fill. Quote Link to post Share on other sites
Waldi Posted May 20, 2019 Report Share Posted May 20, 2019 I’ve ordered 2x1 liter, that was sufficient. Quote Link to post Share on other sites
Rogcastle Posted May 20, 2019 Report Share Posted May 20, 2019 Thanks Waldi/Mike/Walt I was interested in knowing what the correct capacity was as I have my empty axle out at the mo and it's an easy fill rather in situ. I will next time top on a level surface once I have worked out an easy way as my TR is a bit low to get underneath. A bit weird my owners workshop manual says 1.27 litres and that whats gone in. Out on the road hopefully Wednesday, first time this year as the winter jobs took a bit longer than expected. Waldi I have attached a link you asked for showing a Bosch filter as 8 Micron. I expect most post filters around that figure. Better late than never. Regards Roger Quote Link to post Share on other sites
Rogcastle Posted May 20, 2019 Report Share Posted May 20, 2019 Waldi Link as promised https://www.ebay.com/itm/Bosch-0450905021-AN-6-JIC-06-External-High-Performance-Fuel-Filter-8-Micron-/381571013429 Roger Quote Link to post Share on other sites
Waldi Posted May 20, 2019 Report Share Posted May 20, 2019 38 minutes ago, Rogcastle said: Waldi Link as promised https://www.ebay.com/itm/Bosch-0450905021-AN-6-JIC-06-External-High-Performance-Fuel-Filter-8-Micron-/381571013429 Roger Hi Roger, I think it was John who was interested in another post. Best regards, Waldi Quote Link to post Share on other sites
Steve 07976 Posted December 10, 2020 Report Share Posted December 10, 2020 the 0450905021 is not a suitable filter for a Lucas PI system as it is only rated to 8bar. A friend had one fitted to a Jag with a Mk1 Lucas PI system. The can split with quite spectacular results. Quote Link to post Share on other sites
Mike C Posted December 10, 2020 Report Share Posted December 10, 2020 4 hours ago, Steve 07976 said: the 0450905021 is not a suitable filter for a Lucas PI system as it is only rated to 8bar. A friend had one fitted to a Jag with a Mk1 Lucas PI system. The can split with quite spectacular results. 8 bar is 116 psi rated pressure. I would have thought it would take a least 170 psi to rupture it. Well above the PI system's working pressure. Quote Link to post Share on other sites
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