John Bonnett Posted June 13, 2012 Share Posted June 13, 2012 The oil seal on the diff drive flange is leaking. Can a new seal be fitted with the diff in situ or does the whole thing have to be removed, stripped and rebuilt?I'm expecting to hear the worst but will be very happy if you can offer good news.Thank youJohn Link to comment Share on other sites More sharing options...
timraven Posted June 13, 2012 Share Posted June 13, 2012 Should be do able in the car, sure the Haynes manual describes it done that way actually. Get it high and very secure, preferably on ramps, as the torque required to do up and undo the pinion nut is fairly large. To undo it I used a long length of angle iron with two holes in so it can be bolted to the flange, stopping it turning as you undo the nut and vice versa. The most awkward bit is probably going to be removing the split pin, but it should be fine in the car. Link to comment Share on other sites More sharing options...
John Bonnett Posted June 13, 2012 Author Share Posted June 13, 2012 2133 wrote:Should be do able in the car, sure the Haynes manual describes it done that way actually. Get it high and very secure, preferably on ramps, as the torque required to do up and undo the pinion nut is fairly large. To undo it I used a long length of angle iron with two holes in so it can be bolted to the flange, stopping it turning as you undo the nut and vice versa. The most awkward bit is probably going to be removing the split pin, but it should be fine in the car.Tim that really is good news, thank you for that. I've ordered the seal. Link to comment Share on other sites More sharing options...
herald948 Posted June 13, 2012 Share Posted June 13, 2012 Much or all of the leak might be nothing more than a plugged vent causing internal pressure. Check out this thread:Sorry , link no longer available Link to comment Share on other sites More sharing options...
John Bonnett Posted June 13, 2012 Author Share Posted June 13, 2012 herald948 wrote:Much or all of the leak might be nothing more than a plugged vent causing internal pressure. Check out this thread: Sorry , link no longer availableThank you Andy, a really good point that I hadn't thought of. I'll be sure to check the breather is clear before needlessly changing the seal. Link to comment Share on other sites More sharing options...
rotoflex Posted June 13, 2012 Share Posted June 13, 2012 But if it's not the vent, it can be done with the car on ramps & you on your back in the garage spitting out the little mystery things that fall in your mouth while working on it. Link to comment Share on other sites More sharing options...
herald948 Posted June 13, 2012 Share Posted June 13, 2012 3141 wrote:Thank you Andy, a really good point that I hadn't thought of. I'll be sure to check the breather is clear before needlessly changing the seal.I won't guarantee your leak will disappear, but I've been able to bring a leak or two down to almost nothing this way. On the other hand, some new aftermarket seals aren't always a whole lot better than the worn originals that they replace! ??) Link to comment Share on other sites More sharing options...
Nick Moore Posted June 13, 2012 Share Posted June 13, 2012 In Heralds, the original seals are leather. They're supposed to be better than rubber ones, but are harder to find. Not sure if the same is true of GT6s? Link to comment Share on other sites More sharing options...
John Bonnett Posted June 14, 2012 Author Share Posted June 14, 2012 Good news and some very bad news. We put the car on a four post lift last night and found the diff is leaktight. The whole of the chassis rear of the gearbox was coated in oil and the brand new exchange gearbox freshly fitted the day before had only an inch of oil in the bottom after a 220 mile journey. This could explain why the overdrive stopped working :( Link to comment Share on other sites More sharing options...
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