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-   -   Jag Power Lock torque spec and where to get bolts (http://www.clubcobra.com/forums/era-speak-bob-putnam/104394-jag-power-lock-torque-spec-where-get-bolts.html)

Grubby 05-08-2010 03:13 PM
Jag Power Lock torque spec and where to get bolts
 
Gents,
I am going through a 70's Jag XKE Power Lock differential. I am using both the Jag manual and a Dana manual.

I disassembled the Power Lock to look at condition of the clutch packs while I was putting in new seals.

My mistake came when I used the Dana manual for the torque spec on the bolts that hold the two halves of the Power Lock together. It specified 65-70 foot pounds. Before I realized my error I stretched at least one of the bolts.

They appear to be grade 2, 3/8-16 x 2.75" long.

It is obvious the Dana Power Lock must use larger bolts than the Jag unit. Can't tell for sure since the Dana manual does not specify bolt size.

My questions are;
1. What is the correct torque spec for the Jag Power Lock bolts?
2. Where can I get the 8 bolts required? Is there anything special about them that is not obbvious?

Thanks.
John

lal Naja 05-08-2010 04:24 PM
You can buy your bolts from McMaster Carr. Check out their catalog. I buy a lot of industrial items from them including all my Cobra hardware. Typically you can buy a standard box 50 to 100 count of nuts, bolts, washers, etc. for less than you would pay at a hardware store for a dozen.

Their service is fantastic. I'm in Chicago and I order from their website at night when I'm designing components and the next morning the items are at my door.

Grade2? bolts. I didn't think the diff would have anything less than grade 5 or 8. But I'm no diff expert.

Good luck,

Arthur

Tom Wells 05-08-2010 07:17 PM
John,

Here's a guy who can answer those questions correctly:

http://www.cwiinc.com/contact.htm

Tom


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