Description	Lamborghini part number	OEM manufacture OEM details	notes	notes
cap screw - 4ea	BN-02464	6 x 1.0 x 22,	black
cap screw - 5ea	BN-03349	6 x 1.0 x 35,	black
cap screw - 1ea	BN-02485	8 x 1.25 x 10, 3F-8G	black
cap screw-0ea	BN-00099
cap screw-0ea	BN-02474
cap screw-3ea	BN-03350, 8100815	8 x 105 x 1.25 x 8g	black
cap screw-5ea	BN-02575,  8100843	8 x  90 x 1.25 x 8g	black	number missing on drwg
washer, wave - 8ea	RFN-01235	6.4 x 11.5 x 0.5  wave	black
washer, wave - ea	RFN-00694, 8410805	8.35 x 17 x 0.75 wave	black	early Miura diff
washer, flat -	RN-02474	8.5 x 23 x 3	plain	not shown on early, but used on all
washer, flat -	RN-03688	8.5 x 23 x 3	plain	not shown on early, but used on all
washer, split lock	RFN-00166, 8410806	8.4 x 14.4 x 2	black	later Miura diff

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June 2009 - This is in regard to a recently purchased P400 Miura which developed a significant oil leak immidiately after purchasing it. The selling dealer said that it was the upper sump gasket & agreed to replace it at their expense. This was early April, & AFAIK, the car had not been driven since. This past weekend, it was entered in a local car show, & upon driving it off the wrecker & into the show venue, I noticed that the same oil leak was present. I am taking over servicing of this car from the selling dealer. I'm going to try to find the leak with some tracer dye some time in the next couple of weeks. In the meantime, I was hoping to get some suggestions from this group as to areas I might focus on. They replaced both sump gaskets, & at the same time, replaced the starter seal & the shift rod seal. Upon studying all the service records, I found that in May '08, they replaced both sump gaskets as well as the oil temp sender. Therefore, I'm either looking for a leak that would fool someone into thinking it's the sump gasket, or I have some sort of problem with crankcase pressurization. Any input would be greatly appreciated. Michael Keith  Houston, TX  mechanic for 3571

Michael,  This may not be your problem, but let me explain a rather complicated situation that could be your issue. During the 80's and into the 90's GT Car Parts provided transmission case gaskets which were too thick (as I recall 1.0 or 1.2 mm rather than 0.8 mm, but I would need to check on the exact numbers). The result was that there was a dimensional stack-up problem now where the transmission shaft would pass into the transmission case. The problem was revealed to the mechanic as having trouble getting the shaft into the box... but this was overcome by use of a large Italian hammer. Forcing the shaft through damaged the new seal, thus creating a perpetual leak. My car suffered from this when it was rebuilt by Bill Morton in 86-88. This was resolved only a couple of years ago when Jeff Stephan went through the engine and transmission. Jeff used the modern GT Car Parts gaskets which are the correct thickness (the transmission shaft easily passes from the engine case into the trans case). I have seen quite a few Miuras with this exact problem over the years. It's a miserable problem because one is constantly leaving oil everywhere and constantly cleaning the chassis. If one does not keep the chassis clean, the oil will prematurely rot out the motor mounts.
This however is not the end of the story. It's more complicated as I mentioned earlier.
Back in the days when GT Cars Parts was using the incorrect gasket thickness material, Bob Wallace understood the problem and took action as race prep shop might. He milled the trans cases to account for the extra gasket thickness. All was well with his rebuilds until the next time when the correct gaskets are now installed (as currently available from GT Car Parts). Now the stack-up problem reappears in the opposite direction with the same result and new perpetual leaks. Everyone who has a "Bob Wallace" rebuild should be made aware of this and the trans cases should be measured to see if they've been milled. If they are, custom (too thick) gaskets should be made or one will have a problem after the engine is installed.
I hope this isn't the source of your problem (but it certainly sounds as though it could be...). Please let us know what you learn. Best regards, Greg&Precious