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LSD preload spec.

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

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Posts: 193
Joined: Mon Oct 31, 2005 6:21 pm
Location: BEECHWORTH NTH EAST VIC.

LSD preload spec.

Post by GUte »

G'day all.
Wanting to increase the preload in my LSD.
Can anyone recommend a preload spec for my GU 4.11 running 35 pede's?
Thanks for any help.

Al.
Posts: 104
Joined: Thu Jan 26, 2006 2:07 pm
Location: Gippsland vic

Post by Fozdick »

When i set mine up, i was a bit conservitive and with a .5mm shim i ended up with 150nm up from a fairly worn (320,000ks) 85nm before.
i would check what you have now and then work up from there, 150nm works good with 33s and bitumen work, but for a car that runs simex 35s full time , maybe 200nm would be a good starting point try a .75mm shim.

Shaun.
TB SLUG. Dints, Cracks, Scratches, Rust, Mud, Broken Bits and Rattles.
Posts: 193
Joined: Mon Oct 31, 2005 6:21 pm
Location: BEECHWORTH NTH EAST VIC.

Post by GUte »

Good onya Shaun.
It's a job for this coming weekend.

Al.
Posts: 104
Joined: Thu Jan 26, 2006 2:07 pm
Location: Gippsland vic

Post by Fozdick »

A few more tips for the job.

You need to copy a lsd plate, including the "ears",
if you dont include these it wont sit right , it is tricky to cut material this thin , be carefull !! i used a holesaw for the middle hole and then cut the outside with a thin cutting disk on the angle grinder. I bought some steel shim plate from a bearing supplies for the job. To test the preload, i cut the end off of a coulpe of old axles and welded a plate to one (to clamp onto bench) and an old socket to the other (to attach torque wrench).

Shaun.
TB SLUG. Dints, Cracks, Scratches, Rust, Mud, Broken Bits and Rattles.
Posts: 193
Joined: Mon Oct 31, 2005 6:21 pm
Location: BEECHWORTH NTH EAST VIC.

Post by GUte »

Thanks Shaun,
I have purchased some shim steel.
Will give it a go on the weekend.

Al.
Posts: 193
Joined: Mon Oct 31, 2005 6:21 pm
Location: BEECHWORTH NTH EAST VIC.

Post by GUte »

Shimmed the LSD today.
I did not check it prior to removing as I should have to compare.
Anyway I used 20 thou. (.50mm).
It has given me 180 ft-lb (245 n-m) at the hub.
I feel that it could have gone more.
Maybe when I get a spare moment I might up it another 10 thou. (.25 mm).

Al.
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