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DISCUSSION => Engine + Driveline => Topic started by: a.12912 on April 29, 2008, 12:56:02 AM

Title: Differential change: 4 cylinder open to 6 cylinder LSD
Post by: a.12912 on April 29, 2008, 12:56:02 AM

Hi.

Differential change: 4 cylinder open to 6 cylinder LSD

Requesting the procedure involved in correct exchange of a small 4 cylinder diff to medium 6 cylinder differential .

thanks

Title: Differential change: 4 cylinder open to 6 cylinder LSD
Post by: Boyracer on April 29, 2008, 01:29:48 AM

On E36 you need to change:

- driveshaft (the one between differential and gearbox) from 6 cylinder model
- half shafts (the ones between differential and wheel hubs) from 6 cylinder model

Not sure about E30.

Title: Differential change: 4 cylinder open to 6 cylinder LSD
Post by: Wizard on April 29, 2008, 04:06:43 AM

E30's are a direct swap...you may have to adjust driveshaft. Search threads as this has been covered in the last couple of weeks.

Title: Differential change: 4 cylinder open to 6 cylinder LSD
Post by: mikedz on May 02, 2008, 11:56:27 PM

the driveshaft is ajustable you just need to lossen the slip collar it is located about about the cat. It is splined so it won't need to be rebalanced. you also need the axle cups from the six cylinder car they should come with the diff. other than that everything else lines up fine. Ajust the driveshaft all the way forward. i used a channel lock to loosen the nut on the driveshaft. Let me know if you need anymore help.

Title: Differential change: 4 cylinder open to 6 cylinder LSD
Post by: Ruger on May 05, 2008, 10:05:21 PM

so no need to get the 6 cylinder axles/cv's on e30 cars?

Title: Differential change: 4 cylinder open to 6 cylinder LSD
Post by: mikedz on May 05, 2008, 11:14:05 PM

There is no need to change axles they are the same. You just need to use the drive flange outputs that where original on the medium case because the ones from your small case you have now will stick out to fare and the axles will appear to be to long.

Title: Differential change: 4 cylinder open to 6 cylinder LSD
Post by: tjts1 on May 05, 2008, 11:14:40 PM

Nope its all the same. You will have to adjust the length of the drive shaft a bit. Its adjustable.

Title: Differential change: 4 cylinder open to 6 cylinder LSD
Post by: Ruger on May 06, 2008, 09:53:21 AM

Awesome news folks thanks for the help!!!!! now to hunt down a new diff and replacement axles since mine are noisy