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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 12-03-2012, 02:58 PM
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hh3uunp hh3uunp is offline
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How much harder is removing a automatic gear box compared to manual

I took my manual gear box out of my car to do a clutch job. I saw a 540iA with a bad transmission and it comes with a used transmisson. How hard is removing an automatic gear box compared to a manual ?
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  #2  
Old 12-03-2012, 04:03 PM
vavet5308 vavet5308 is offline
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It's not much more difficult. It's easier in some ways. The transmission doesn't have to move back as far before it can be dropped because you don't have to work around the clutch. The torque converter has to be disconnected from the flywheel though. It's a pretty straight forward process though. You just have to remove the access plug and rotate the crankshaft around with a long-handled ratchet and socket to find each of the bolt attaching the flywheel to the torque converter.

The biggie is that the auto trans is much heavier than a manual. You're going to want a transmission jack to do the swap.
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Old 12-03-2012, 07:00 PM
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hh3uunp hh3uunp is offline
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Second question

When I replace the automatic with a manual I need the driveshaft but not the diff right?

I have NCS expert to code the ECU for manual
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  #4  
Old 12-03-2012, 07:45 PM
vavet5308 vavet5308 is offline
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According to realoem, the driveshaft for an auto trans car is 1521mm.
A manual trans car has a driveshaft of length 1609mm, a difference of about 3 inches.
I made some assumptions that this is a US spec car built in Jan 2001. I don't know if a different production date would have different specs, but I don't see why they would.

The auto trans car has 3 different differentials listed, one of which is the same as the only differential listed for the manual trans car. This is a 2.81 rear end ratio. The other two diffs are both 3.15 ratios. I'm not sure what the difference is between the two of them. Regardless, I'd say you're fine keeping the original differential and swapping the driveshaft.
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Old 12-03-2012, 07:50 PM
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hh3uunp hh3uunp is offline
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Thanks man!
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  #6  
Old 12-03-2012, 08:08 PM
JimLev JimLev is offline
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Quote:
Originally Posted by vavet5308 View Post
It's not much more difficult. It's easier in some ways. The transmission doesn't have to move back as far before it can be dropped because you don't have to work around the clutch. The torque converter has to be disconnected from the flywheel though. It's a pretty straight forward process though. You just have to remove the access plug and rotate the crankshaft around with a long-handled ratchet and socket to find each of the bolt attaching the flywheel to the torque converter.

The biggie is that the auto trans is much heavier than a manual. You're going to want a transmission jack to do the swap.
hh3, I think you are less than 20 miles from me, I have a tranny jack.
I'd also like to see your NCS.
PM me if you want to borrow my tranny jack.
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