Collapsing the pinion spacer?

[Shane001]

We've just finished rebuilding a MkIII Supra diff, and decided to go with a Toyota collapsable pinion spacer rather than a solid spacer with shims.

The TSRM suggests to torque the pinion nut to 134 ft lbs to collapse the spacer to set the correct preload, but we put almost 200 ft lbs on the nut and the spacer would not collapse? Are we missing something?

Thanks.

[lexsmaz]

How do you know that its not collapsed ?

Has the bearing preload increased at all ? is there any endfloat in the pinion, with the nut torqued up ? ..

[Shane001]

At 200 ft lb the pinion is still as loose as a, well this is a public forum...

So not even close to any preload.

Pull it apart and the spacer is unchanged, even measured it to be sure. Bear in mind we pulled this apart and back together a half dozen times to make sure nothing else was a problem. Definitely the spacer. Apparently these are the same as the V6 / 4Cyl Turbo Hilux (?) too if that helps.

Thanks.

[lexsmaz]

You would think that it should have collapsed at that figure ? ..

How thick is the wall of the spacer, is it the correct spacer ?? ..

[Shane001]

According to Toyota it is. I'm out at the moment so can measure it later, but it looked the same as the collapsed one that came out of the diff, just not collapsed of course

The new one measured almost exactly 48mm in length, the old one measured 47.3mm in length. So I think it's probably the correct one, unless it's a different material.

[wilbo666]

Manual is prbly a little conservative....

Take a lot of effort to collapse!



E.g.
http://www.youtube.com/watch?v=8APYO2sZyJU

Cheers
Wilbo

[RA35GT]

G'Day mate,

http://www.cygnusx1.net/Supra/Librar...aspx?S=RA&P=25

Look at step eight, increase the torque by 9ft-lb at a time, until you get the right preload.

Maximum torque is 250 ft-lb, get back out there and put more muscle in

[Shane001]

Bugger, missed that bit

Oh well, guess we better go stock up on weeties!

Thanks everyone for your replies. Pays to read the manual thoroughly next time! DOH!

[1JZ-Rolla]

Just out of interest, what's the reason for choosing the collapsible spacer over solid? Any benefit? (other than being simple?)

Cheers

[Shane001]

Availability...

On that note, anyone know where in Aust to buy a solid spacer with shims?

This was a temporary rebuild of a welded diff to be used as a spare and for testing while I'm waiting for a spool to be made.

[1JZ-Rolla]

On that note, anyone know where in Aust to buy a solid spacer with shims?

Not sure that you can..... My diff guy had to machine a spacer from a Datsun 720 diff & shim to suit. Different diff (F series) but same principle.

[Shane001]

They're readily available in the US from the likes of Marlin Crawler;
http://www.marlincrawler.com/htm/diff/pickup_diff.htm

[v8gz20]

at toyota the tools i used were twice as long as in this video
http://www.youtube.com/watch?v=8APYO2sZyJU

[Shane001]

Clearly they don't feed u enough weeties at Toyota lol