E39 540i, E38 740i Diffsonline Stock Rebuild: 3.15, non-LSD

Stock 540/740 3.15 differential rebuilt with love

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Price:
$1,749.00

This listing is for a E39 540i and E38 740i/iL differential rebuilt to stock specs by the experts at Diffsonline. No charts and data to ponder - if you just want your differential to perform as it did when new - or better! - this is your best option. This is a non-limited slip differential with the optional sport 3.15 gear ratio for better acceleration. This is rebuilt with all new bearings and seals and is a better long-term option than buying a questionable junkyard diff.

This listing takes out all of the guesswork and research on buying a 540i/740i diff. The Diffsonline 3.15 diff is rebuilt with the optional 540i Sport gear ratio (3.15) for better performance (original 2.81 gearing is also available). Polishing of gears and bearings is also available to improve service life and performance.

The rebuild process is extensive:
  • The used diff is disassembled and cleaned
  • The outside case (carrier) is stripped of grease, grime, and rust
  • New OEM bearings are fitted
  • New OEM seals are fitted
  • The entire internal assembly is aligned (crucial in avoiding gear whine later on)
  • Final assembly and checks
  • Carrier is given a fresh coat of black paint
  • Shipment to your door in special heavy-duty packaging
You must check the output flange Torx bolts on the original differential (easy to do with the diff off the car). We supply output flanges that must match your existing axle shaft. The bolt diameter (not head size) will be either M10 or M12 size. If your car came with the 3.15 gearing from the factory you have the M12 bolts and don't need to check. Select your option above.

A $600 core charge is not included in the the price and will be added during processing. We need your original diff returned so we can continue rebuilding diffs for other customers. Your original differential must be returned to Diffsonline within 14 business days. Only complete and reusable cores will be eligible for a refund (no blown out, abused, or modified cores please). You must return a diff equal in components and accessories to the one sent to you. You can avoid the core charge altogether by sending in your original diff to be rebuilt.

The diff you receive will be ready to install, minus the fluid and rear cover (which you remove from your original diff). We recommend Red Line 75W90 for street or 75W110 for light track use.

A core charge applies to this purchase. The supply of original parts for rebuilding keeps the final purchase price low. The core must match the part that was supplied in terms of fitment, type, application, accessories, and hardware. Damaged or modified cores will not receive a refund. A core charge can only be refunded once the core has been inspected and approved. Click here for our Core Policy.

BMW Fitments:

5 Series
E39 (97-03) > 540i
7 Series
E38 (95-01) > 740i
E38 (95-01) > 740iL
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