Drilling rear pinion...ok? - Defender Source
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  #1  
Old February 1st, 2012, 06:46 PM
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Drilling rear pinion...ok?

OK, so thank you all for the fuel tank help. It was very...well, helpful for lack of a better phrase

Next question:

I have Randy's RoverBones diff guards coming front and rear.

I would like to install a bolt-on rear pinion guard, such as the rockware:

http://www.expeditionexchange.com/ro...e003%20011.jpg

but the two mounting bolt holes don't exist (yet) on my rear pinion.

I guess my question is, can I drill/tap the holes myself into the pinion? If so, how deep can the holes be before punching into something vital? What is the recommended thread diameter/pitch?
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  #2  
Old February 1st, 2012, 08:50 PM
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I've never seen a rover without those holes.
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Old February 1st, 2012, 08:57 PM
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Oh Philip! Sorry, good point!

I forgot that my Defender's rear comes from a range rover classic. I'm not sure if that makes a difference.

But really it doesn't have the holes.
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Old February 1st, 2012, 09:36 PM
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Is this a trick question Ed? Just weld a piece of plate on and be done! It's not like you can't replace the pinion housing one day if needed, or cut it off.
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Old February 1st, 2012, 09:59 PM
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Are you sure they're not just packed with muck? Mine were...thought the same thing for a bit until I took a pick and scraped them out.
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Old February 2nd, 2012, 09:35 AM
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hmm...good point, let me poke up there jason.
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Old February 2nd, 2012, 09:48 AM
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If you really don't have the holes and you really want to bolt on a pinion guard, I can measure the depth on one here. I'd go with any standard size thread as the rover one is some non-standard size.

Truck running yet?
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Old February 2nd, 2012, 09:53 AM
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Yeah those threads are some fucked up british thread
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Old February 2nd, 2012, 10:01 AM
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Whitworth?

Like the F'd up british truck we drive ...
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Old February 2nd, 2012, 10:18 AM
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FWIW I re-tapped mine to 3/8-16 and haven't had any problems
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Old February 2nd, 2012, 10:28 AM
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That is because you have never owned a Rover made before the 1980's.

Quote:
Originally Posted by rover4x4 View Post
I've never seen a rover without those holes.
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Old February 2nd, 2012, 03:30 PM
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Truck is definitely not up and running yet due to the fuel tank sitting in my bathtub.

Need to derust and paint before replacing.
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Old February 2nd, 2012, 03:36 PM
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Oy. So WTF are you thinking about a pinion guard you don't need!
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Old February 2nd, 2012, 03:37 PM
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Because I'll need it once the diff guards come in!
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Old February 2nd, 2012, 03:38 PM
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he's planning his reason why the truck won't be driveable til the fall!
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Old February 2nd, 2012, 03:47 PM
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Quote:
Originally Posted by sonoronos View Post
Because I'll need it once the diff guards come in!
No you wont - they are unrelated. Weld on the diff guards (5 mins) and skip the pinion guard. Drive your truck before worrying about it - i doubt you'll ever be in a position where you wished you had them, but if you ever do, then would be the time to add them
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Old February 4th, 2012, 03:49 PM
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Hey at the rate you're going the truck will be so shiny that you'll never off road it.
What do you need a rear pinion guard for anyway? If you're going forward the front axle of the truck will wipe out any bad stuff!
Front and rear diff pan protection - that's a good idea
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