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I fitted a 525tds motor into my 67 mk2 jag a year ago. It drives well and is very quick but the jag rear diff gives it a top speed of about 85mph which isn't good but that's why its quick! I'm just about to fit a 6 speed gearbox from a 120d. This should give me 106 MPH top speed. Its not about the top speed of course. While searching the net I noticed the 6th gear if I was to use a 6 speed from a 118d will give me a 130 mph top speed which is where I want to be. The gearbox from the 120d and the 118d look identical and even seem to have the same part numbers. Can anyone help me identify the gearbox with the higher 6th gear before I buy it. The 120d has a 6th gear ratio of 0.85 while the 118d is 0.65.
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To be fair I have no idea how you will tell but there are some specialist bmw breakers that may be able to help. Love the idea of the conversion Though.
Cheers
Jim
 
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