Any documention of adding Sure Grip to 8 3/4

[Johnny Boy]

Found this site today with a google search and am glad it exists. I am a previous owner and builder of multiple A-body cars. Currently my excitement for these cars has returned through my son with a '73 Duster that has become our project. We built a 360, estimated 400hp, which was added to the car with 727 and 8 3/4. Currently this is an open differential and we just purchased a Sure Grip that is about to be installed. Extracting axles and pulling the 3rd member is not a problem. I just have never disassembled and/or set anything is the differential unit myself up to this point. First the first time, I am nervous.

A previous article stated that " [FONT=&quot]If all you are doing is putting in a sure grip on an open rear that is in good condition then you'll only need to set back lash and carrier bearing pre load which is not too hard on an 8 3/4". I am not sure what carrier bearing pre load is, how to set it, nor its value.

Another article metioned "Set the back lash to the original value to prevent potential whine". This is can handle. The dial indicator is ready to go.

I imagine this will not be a big deal, but I would like to be prepared.

Has anyone seen any manuals, especially on-line articles, that steps through rebuilding of the third member?

Option 2: Anybody want to offer a step by step guide if an article is not availiable?
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[cudaman51]

http://www.ringpinion.com/Content/H...tions/Yukon_Installation_Kit_Instructions.pdf hear it is have fun

 

[70Duster440]

Which of the 3 third members do you have? The setup varies.

 

[Johnny Boy]

The sure grip unit I have is the cone style. And to the cudaman51, thanks for the site. The is perfect for an overall general knowledge.

 

[demon seed]

No, what we need to know is what model of 8 3/4" pumpkin (3rd member)do you have, 741 or 742 or 489. There will be a 8 or 6 digit casting number on the bottom of the case that will end in either of the 3 number sequence.

Terry

 

[Longgone]

Mopar Muscle Magazine had a comprehensive article on setting up gears. Here`s a link- http://www.moparmusclemagazine.com/howto/mopp_0308_mopar_rear_end_gears_set_up/index.html

 

[Johnny Boy]

demon seed, thank you for being patient. It is a 489 case.

 

[demon seed]

demon seed, thank you for being patient. It is a 489 case.

Then that article by Longone is perfect since it is for the 489 which uses the crush sleeve and not the others which use shims for the pinion preload.

Terry

 

[cudaman51]

one thing i took note of if your changeing gears take note of the old pinion deph an do the math for the new gears and if your really lucky it might work out for shim choice on the first try.Another tip i heard is hone out a spare bearing for temporary assembly to meashure pinion depth for they don,t come off easily.I have never done this and this is just observations and hear say.

 

[Johnny Boy]

Thanks for all the assistance. The Mopar Muscle Magazine article is great. I am now ready to tackle this project.