Limited slip testing

Technical advice Q&A

Topic author
PierreW
Posts: 52
Joined: Sun Apr 23, 2023 5:45 am
Location: France
France

#1 Limited slip testing

Post by PierreW » Sun Aug 27, 2023 6:39 pm

Hello . I'm probably going to ask a stupid question.
If the car is lifted on one side and no gear is engaged, is it possible to turn the lifted wheel or is there an immediate blockage? . I tried to turn the wheel which is lifted, transmission shaft turns a little (1/4 of a turn) and after that I can no longer turn the wheel as if a gear was engaged. Is this normal? :scratchheadyellow:
If not what would be the other ways to test and if it does not work properly what would be other symptoms on the road?
Jaguar MK2 1967 since 1980
MGA 1500 roadster 1957 since 1982
Lotus Seven 1963 since 2015
XKE S1 1964 OTS since 2023

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Simonpfhc
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Joined: Mon Aug 27, 2012 12:38 pm
Location: Surrey
Great Britain

#2 Re: Limited slip testing

Post by Simonpfhc » Sun Aug 27, 2023 7:03 pm

Hi Pierre,

There are friction rings that will stop you turning that wheel. However, with some extra effort, you should be able to turn it, although it can be quite difficult.
Simon
62 3.8 FHC
91 Porsche 928GT
Find me on Instagram and Facebook @oldcarfixer

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Topic author
PierreW
Posts: 52
Joined: Sun Apr 23, 2023 5:45 am
Location: France
France

#3 Re: Limited slip testing

Post by PierreW » Tue Aug 29, 2023 7:43 pm

Thank you so much ! as I had never been in contact with a limited slip differential I did not know how it reacted! so i think it works fine
Jaguar MK2 1967 since 1980
MGA 1500 roadster 1957 since 1982
Lotus Seven 1963 since 2015
XKE S1 1964 OTS since 2023

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Gfhug
Posts: 3324
Joined: Thu Jun 19, 2014 3:08 pm
Location: Near Andover, Hampshire,in D.O. Blighty
Great Britain

#4 Re: Limited slip testing

Post by Gfhug » Tue Aug 29, 2023 7:57 pm

Pierre, for all the information on limited slip differentials try a simple search for LSD, then search those results for opposite. I very quickly found the information showing how to test for a limited slip diff, see here:
search.php?st=0&sk=t&sd=d&sr=posts&keywords=LSD

That’ll give you results for LSD (limited slip differential), then in the box “search these results” type opposite.

That should both help you understand the diffs and how you can use the search function to find lots of useful information. Getting used to how to use the search can be difficult, but a few tries can often get you a lot of pertinent results.

Geoff
S2 FHC Light Blue
S2 OTS LHD - RHD full restoration

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