Member
Hello everyone!
I have a 1999 m52b28tu Z3 auto, and I'm considering a manual swap. Not willing to change the car, because it's nice spec.
However, I can't find information will a driveshaft from 3.0 fit? RealOem says that both 2.8 and 3.0 shafts are 1244mm, but they are with different part numbers - 26111229474 for the 2.8 and 26117511275 for the 3.0.
Are they interchangeable? What’s the difference between them? Any info will be helpful! Thanks.
Sim Simma
Moderator
As long as you get the driveshaft from a manual 3.0 and are using the same trans as the manual 3.0 then it will fit
Member
Are you sure?
According to RealOEM the gearbox of a 2.8 and 3.0 are the same, but the final drive is different...
Member
And when you buy a rebuilt manual shaft, just "Z3" is good enough for a swap. Curious of the differences too, but the rebuilt shaft I ordered bolted right up. Perhaps the difference is the overall assembled length, which is adjustable anyways with the locking collar.
Nathan in Denver
1999 M Roadster, VFE V3 S/C, Randy Forbes Reinforced, Hardtop, H&R/Bilstein, Apex PS-7, Supersprint
1999 Z3 2.8 Coupe, Headers, 3.46, Manual Swap, H&R/Koni, M Geometry/Brakes, M54B30 Manifold, Style 42
Sim Simma
Moderator
If both Z3's came with the same gearbox the total length will be identical
Yes I am sure. And all Z3 rear differentials are interchangeable, they are different part numbers only because the gear ratio changed.Originally Posted by tommymiladinov
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Member
You will want to change the differential before you install the driveshaft. If memory serves, the auto diff is something like a 4.4 ratio because the auto tranny has an overdrive, while most BMW manual trannys have a direct high gear. You probably want a rearend in the 3.1 to 3.4 range.
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