It's that time again:)
Large Case 3.91 LSD, came off 1993 Euro M5 in good condition. Asking $1250 plus shipping. (I can ship Internationally relativeley cheap. Last one shipped to Australia was $1550 total.)
Great upgrade for E34/E31/E32 8 and 12 cyl. cars, makes your car feel 500LB lighter, acceleration is greatly improved, biggest bang for the buck upgrade you can get...car comes alive!
3.91 LSD was only offered in the US E-34 M5 up to 7/91,remaining years 92&93 used a 3.73 gear ratio. And no the 735i 3.91 diff is not the same and will not fit 850i, it's not a large case unit. So plese no emails with "I can find the same diff at any junk yard for $500".
This differential is a direct swap, all you need to do is swap the output flanges and the back cover. The M5 output flanges are smaller then the E31 or E32 flanges.
The stock differential in 850i/a is an open end 3.64. Yes you will be able to sell yours for $300-500, its an upgrade for 840i and I believe 540i?
After the swap the RPMs are about 3000 at 80mph. Top speed would still be the electronically limited 155mph. But most people spend more time driving 0-60 where you notice the biggest difference! The fuel milage is hardly affected, it really depends how you drive. I had my 850i with 3.91LSD in it for 4 years, and did not see any difference in consumption.
Large Case 3.91 LSD, came off 1993 Euro M5 in good condition. Asking $1250 plus shipping. (I can ship Internationally relativeley cheap. Last one shipped to Australia was $1550 total.)
Great upgrade for E34/E31/E32 8 and 12 cyl. cars, makes your car feel 500LB lighter, acceleration is greatly improved, biggest bang for the buck upgrade you can get...car comes alive!
3.91 LSD was only offered in the US E-34 M5 up to 7/91,remaining years 92&93 used a 3.73 gear ratio. And no the 735i 3.91 diff is not the same and will not fit 850i, it's not a large case unit. So plese no emails with "I can find the same diff at any junk yard for $500".
This differential is a direct swap, all you need to do is swap the output flanges and the back cover. The M5 output flanges are smaller then the E31 or E32 flanges.
The stock differential in 850i/a is an open end 3.64. Yes you will be able to sell yours for $300-500, its an upgrade for 840i and I believe 540i?
After the swap the RPMs are about 3000 at 80mph. Top speed would still be the electronically limited 155mph. But most people spend more time driving 0-60 where you notice the biggest difference! The fuel milage is hardly affected, it really depends how you drive. I had my 850i with 3.91LSD in it for 4 years, and did not see any difference in consumption.
E34 M5 3.91 LSD Differential 540i E32 740i 750il E31 850i
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