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[GMCnet] Chuck Garton's Rear Spindle Tool [message #285086]

Sun, 16 August 2015 01:58

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

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G'day,

As promised!

http://www.gmcmhphotos.com/photos/g6848-rear-spindle-tool.html

Regards,
Rob M.
The Pedantic Mechanic

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: [GMCnet] Chuck Garton's Rear Spindle Tool [message #285115 is a reply to message #285086]

Sun, 16 August 2015 12:29

kerry pinkerton

Messages: 2565
Registered: July 2012
Location: Harvest, Al

Karma: 15

Senior Member

Rob, I'm confused. I understand how the pusher works but don't understand why you would drill and tap the bolt holes larger? Wouldn't that mess up installing the new spindle unless you drilled it out also? Why not just use the existing 3/8 threaded holes?

Kerry Pinkerton - North Alabama Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L

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Re: [GMCnet] Chuck Garton's Rear Spindle Tool [message #285148 is a reply to message #285115]

Sun, 16 August 2015 18:24

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

kerry pinkerton wrote on Sun, 16 August 2015 13:29

Rob, I'm confused. I understand how the pusher works but don't understand why you would drill and tap the bolt holes larger? Wouldn't that mess up installing the new spindle unless you drilled it out also? Why not just use the existing 3/8 threaded holes?

Kerry,

You don't need to drill. The existing 3/8 clearance hole is about a 70% thread for a 7/16-14 thread. With a typical spindle install, there are lock nut back there and with the reaction arms, there is a plate.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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Re: [GMCnet] Chuck Garton's Rear Spindle Tool [message #285154 is a reply to message #285115]

Sun, 16 August 2015 19:05

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

Kerry,

I'm sorry the write up under the photos is a bit confusing; it is not necessary to drill spindle retaining bolt holes, they are
0.375 in OD. The U drill is 0.3661 OD the bolt holes are a bit too large but the 0.0089 isn't enough to affect the thread strength.

I'll revise the write up under the photo it to make that clear and include step by step instructions.

For the moment reference Parts Book 78Z / Section 14 - Air Suspension / Page 14-2 / Figure 14.001 Suspension - Rear Air

Key: 10 - Spindle
Key: 23 - Arm Assy

Note that the spindle pushes in from the "outside" of the Arm Assy; you tap the "inside."

Regards,
Rob M.
The Pedantic Mechanic

-----Original Message-----
From: Kerry Pinkerton

Rob, I'm confused. I understand how the pusher works but don't understand why you would drill and tap the bolt holes larger?
Wouldn't that mess up installing the new spindle unless you drilled it out also? Why not just use the existing 3/8 threaded holes?
--
Kerry

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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