R380 spline wear? - Defender Source
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Old September 17th, 2013, 08:05 PM
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R380 spline wear?

When people talk about output shaft spline wear is this what they are referring to? One pic is the used transmission I just received, the other is a core unit I was going to rebuild.

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  #2  
Old September 17th, 2013, 08:36 PM
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Yup that's it.

Whats wrong with the current transmission?
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Old September 17th, 2013, 08:44 PM
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Originally Posted by rover4x4 View Post
Yup that's it.

Whats wrong with the current transmission?
Current transmission has a bad bearing going. It sounds terrible on cold mornings. The one with the wear was a used unit I bought and received today. I've always heard of the wear, but have never seen it myself. Wanted to confirm that I was correct before going back to the seller.
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Old September 17th, 2013, 08:53 PM
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Quote:
Originally Posted by galen216 View Post
When people talk about output shaft spline wear is this what they are referring to? One pic is the used transmission I just received, the other is a core unit I was going to rebuild.
It's hard to tell from the pictures, but if that is the rearmost portion of the main shaft that protrudes into the LT230 T-case that the final drive gear slides onto, yes.

This is more commonly seen when the final drive gear is not cross drilled to allow proper lube to the splines and they run "dry".

Using the later cross drilled gear is suppose to eliminate or greatly reduce this problem.

I have also taken perfectly good early style (non-drilled) gears to the machine shop and had them cross drilled like their later cousins.
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Old September 17th, 2013, 09:59 PM
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That top pic is the used one you waited weeks to get? Did they tell you it was worn out and not really usable before shipping to you?
Robert hit the nail on the head about the gear in the transfer case.
Man, I sure hope the seller does right by you.......
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Old September 18th, 2013, 06:01 AM
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Wow. I hope you got it really cheap. Cheap enough to make it cost effective to install a new shaft.
This is the spline wear on my '95 Disco at 265,000 miles and I wouldn't sell it to someone, at least not without a photo of it.

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Old September 18th, 2013, 07:59 AM
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Originally Posted by Antichrist View Post
Wow. I hope you got it really cheap. Cheap enough to make it cost effective to install a new shaft.
This is the spline wear on my '95 Disco at 265,000 miles and I wouldn't sell it to someone, at least not without a photo of it.

It wasn't cheap, but the seller is making it right. It's a shame because I have a good mainshaft from a transmission I broke down to rebuild and it has a good mainshaft. Mine looks just like your picture and it was claimed to a 80k unit.
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Old September 18th, 2013, 08:27 AM
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Originally Posted by galen216 View Post
IMine looks just like your picture and it was claimed to a 80k unit.
Depending on how it was used, that main shaft could have easily had 80K on it especially with a lot of around town driving and if the oil level was low in the T-case, well you know the rest of the scenario...

See twins of these worn out shaft pictures all too often... helps keep our friends at Ashcroft deep into a going concern with no shortage of customers.
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Old September 18th, 2013, 09:23 AM
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I can only imagine seeing wear like that on some very soft alloy steel.
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Old September 18th, 2013, 09:37 AM
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Seems the seller let some guys ship out a worn tranny from his shop.... not the good one he had pulled.

That fat bastard should be shot.

There will soon be a free rebuildable r380 core in central PA.
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Old September 18th, 2013, 10:14 AM
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Quote:
Originally Posted by atlcruiser View Post
Seems the seller let some guys ship out a worn tranny from his shop.... not the good one he had pulled.

That fat bastard should be shot.

There will soon be a free rebuildable r380 core in central PA.
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Old September 18th, 2013, 11:00 AM
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I had a knowledgable person, no name to be mentioned, buy a 'good' 'Defender' R380 for me while in the UK a few years back. That box was one of two purchased under the same request. What I received was a worn out Discovery R380 with the infamous spline wear shown above. I had to order all of the rebuild parts from Ashcroft including a new mainshaft and drilled LT230 input gear. I also ordered all the bits to convert this to a Defender setup. Before I rebuild this box I am considering cyro treatment of the mainshaft (possibly gears too) and LT230 input gear to reduce or eliminate this potential problem.
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Old September 18th, 2013, 11:08 AM
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Quote:
Originally Posted by ezzzzzzz View Post
Before I rebuild this box I am considering cyro treatment of the mainshaft (possibly gears too) and LT230 input gear to reduce or eliminate this potential problem.
Cryo unfortunately will not help. The metal used is the problem. A custom made shaft out of a much stronger alloy steel with heat treatment would solve the issue.
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Old September 18th, 2013, 11:20 AM
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