cowman Posted July 4, 2007 Share Posted July 4, 2007 After finally going through the trailer load of spares that came with my '69 mk1 pi, ive come across a spare diff.The number stamped into it are "MG 34421".Can someone tell from this number if its from another pi or another ratio from a mark 2?There seems to be a mixture of mk1 and 2 spares like speedos, steering wheels, lights, indicator lenses etc.Ive also found a spare head that seems to be a pi head (516 816) according to the NZ triumph owners website.All help appreciated.Thanks,Glen. Link to comment Share on other sites More sharing options...
Deleted User Posted July 4, 2007 Share Posted July 4, 2007 That is a Mk2 2.5 diff which apart from it's backplate is perfect for a mk1 (same ratio etc) Link to comment Share on other sites More sharing options...
Deleted User Posted July 4, 2007 Share Posted July 4, 2007 That is a Mk2 2.5 diff which apart from it's backplate is perfect for a mk1 (same ratio etc) Link to comment Share on other sites More sharing options...
Deleted User Posted July 4, 2007 Share Posted July 4, 2007 good ones like that are pretty tip top quality,- same axle as TR6 pi too btw! Link to comment Share on other sites More sharing options...
cowman Posted July 4, 2007 Author Share Posted July 4, 2007 Thanks guys.So what are the main differences if any? Stronger?The current diff seems fine apart from an oil leak from the front that dosent really bother me, but i should fix soon.(Long list of other jobs)I will also check what numbers are on the current diff in the car.The speedo is out by 10 KPH ( as in reads 110 and is actually 100kph) and im starting to wonder if the diff is not what it should be.The original gearbox has been changed to a 4speed + OD from an "S" and the speedo is from a mk2, reads both MPH AND KPH.Wheels are still original 13inch. Link to comment Share on other sites More sharing options...
Deleted User Posted July 4, 2007 Share Posted July 4, 2007 If you already have a 3.45 it will be effectively identical to the Mk2 version.Watch the front seal... if the breather gets blocked you can lose all the oil and fry your diff in no time... keep a close eye on it and see how much it leaks.Chris Witor sell the original leather seals which always are a little "moist" but shouldn't fail catastrophically (apparently modern rubber ones can)They are cheap and are still made (for Westland helicopters apparently) Link to comment Share on other sites More sharing options...
Greeks Posted July 4, 2007 Share Posted July 4, 2007 cowman wrote:Thanks guys.So what are the The speedo is out by 10 KPH ( as in reads 110 and is actually 100kph) and im starting to wonder if the diff is not what it should be.The original gearbox has been changed to a 4speed + OD from an "S" and the speedo is from a mk2, reads both MPH AND KPH.Wheels are still original 13inch.Might make a difference if the speedo is from a car with 14 inch wheels ... but then mine is also out by the same although the other way and it's the right diff. and wheels. At least yours errs on the cautious side! Link to comment Share on other sites More sharing options...
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