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Go Back   Madabout Kitcars Forum > Mad Build Area > Tribute Automotive Builds

Tribute Automotive Builds Discuss your Tribute kit build

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  #1  
Old 2nd July 2020, 19:15
Hughandjen Hughandjen is offline
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Default LSD or not

Hi guys
I have a 1998 2.8 Z3 base on my 250swb. I have just been doing a full service on the car. I wanted to do the diff oil too but am not sure if it is an LSD or not. I know it is supposed to have a tab on the diff with an identity number but that is missing. On bmw forums it appears that some cars had LSD and some didnít. How to I check what I have
Thanks in advance
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  #2  
Old 2nd July 2020, 20:13
molleur molleur is offline
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There should be a letter "S" on the diff casting, as well as on the missing tag beginning with "S". Most 1998 Z3's came with a Torsen visco differential and not an LSD. Hope this helps. There is a ton of miss-information about this. I too, have a manual 1998 2.8 as the base for my 250 SWB Coupe still in process. If you have the Z-3 handbook for that car, it may help. If not, let me know and I'll peek at mine.
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  #3  
Old 2nd July 2020, 20:25
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Mister Towed Mister Towed is offline
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From memory, there's a difference between clutch type and gear type LSD's and I have no idea which type BMW fit.

Try jacking the whole back end up so both wheels are off the ground, then turn one wheel and observe the other. If it turns in the same direction you definitely have a clutch type LSD fitted, if it turns in the opposite direction you either don't have an LSD or you have a gear type one fitted.

If it's the latter, drive the car onto a verge so one rear tyre is on a loose surface and the other on tarmac, then accelerate away, if the tyre on the loose surface spins you have no LSD, if it doesn't spin then you do have an LSD of some type.
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  #4  
Old 4th July 2020, 09:18
WorldClassAccident WorldClassAccident is offline
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Just rag it around the nearest round about and see how well it drifts?
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  #5  
Old 4th July 2020, 12:47
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...then while you're upside down waiting for Trumpton to show up with their jaws of life, you can ask a helpful passer-by to take a closer look at your diff and see if it has LSD stamped on it anywhere.
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Old 4th July 2020, 14:26
molleur molleur is offline
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Quote:
Originally Posted by Mister Towed View Post
...then while you're upside down waiting for Trumpton to show up with their jaws of life, you can ask a helpful passer-by to take a closer look at your diff and see if it has LSD stamped on it anywhere.
funny!
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  #7  
Old 4th July 2020, 15:58
Hughandjen Hughandjen is offline
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Haha
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  #8  
Old 6th July 2020, 21:51
WorldClassAccident WorldClassAccident is offline
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Well it worked for me :-)
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