110 rear diff clunk - Defender Source
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  #1  
Old November 13th, 2005, 01:33 AM
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steve
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110 rear diff clunk

In my 110 there is a loud clunk originating from the rear diff not the transfer case. It happend while shifting but it can be avoided by feathering the clutch excessivly. This is a new truck to me but the PO had some irrgular spline wear on the last halfshafts.
The U joints are good.
What do you guys think? diff... carrier? If I get an ARB and new half shafts do you think that will do it??

Thanks all
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  #2  
Old November 13th, 2005, 10:36 AM
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Park on level ground and chock the weels so it won't roll away. THen relese the park break, try roatating the rear driveshaft. There shouldn't be that much movment.
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  #3  
Old November 13th, 2005, 12:52 PM
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Peter Sherman
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I just checked mine its 1/4 =3/8's
Drain the diff pull the cover & have a little looksie
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  #4  
Old November 13th, 2005, 01:10 PM
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Is that 1/4 to 3/8 of a turn

Follow-up Post:

Is the crown wheel tight on the carrier
Are the input pinoin bearings O.K?
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  #5  
Old November 13th, 2005, 01:31 PM
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NOT of a turn!!!!!!! of a inch!! Or approx 5 degrees I can be precise
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  #6  
Old November 13th, 2005, 02:11 PM
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3/8"???, that is nothing. 1/4 turn is normal, IME. Anywho, that sounds fine.

I would take a look at the A arm ball joint. They can wear out and you get a clunk right at the diff. If it is gone, get the M-D greasable adjustable ones.

As to the diff itself, if there was wear it would be on the splines at the drive members. They are well known to wear out.
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  #7  
Old November 13th, 2005, 03:02 PM
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I agree
Also check the splines on the prop.
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  #8  
Old November 13th, 2005, 03:38 PM
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So while on level ground in gear with the parking break released there is no movement... not at all. My 90 has about 30 degrees but the 110 has none front or rear ( I like it).
I cant move the rear drive shaft: twisting, up/down, nothing. dosn't seem to be the pinion out put.

I looked at the A arm ball joint and it dosn't seem to be blown out, It actually looked kinda newer.

Should I pull the axles, or just look in the diff?

It don't have a locker now, I want to put one in but I want to make sure this will fix the problem... money issues.

It's a pretty major clunk, it feels like when I'm feathering the clutch... everything moves a bit then it catches, The bushings all around a worn but not enought to cause this.

Thanks all
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  #9  
Old November 13th, 2005, 07:02 PM
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Did the old owner replace the axles after wear? Pull one out and look at splines-easy as removing 5 drive member bolts. Drain a little gear oil into bucket. Is it full of metal frags. If you had a loose ring gear or carrier ,you would have some massive gear wear and vibes and metal frags. Does pinion flange have side to side play? Sounds to me that if you only hear it at clutch engagement and no vibes it is probably bushing related-A arm or lower link frame bushes. Also are you sure the clunk isnt just excess gear play? All rovers clunk a little. Also Early trannys had lubrication issues that lead to worn out put shafts. I dont know if yours has a lt77 or early R380 but both had their issues at one time or another. JP

PS I have a complete 90 rear axle case with stock carrier and axles in excellent shape. It bolts on the same way. If you want to trade your rear axle housing for it, I am looking for a salsbury. I only want the shell.
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  #10  
Old November 13th, 2005, 07:15 PM
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Easy JP he may not know what hes doing there! ON THE TRADE!!!
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  #11  
Old November 13th, 2005, 07:49 PM
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You need to get a big bar on the A arm ball joint to see if it moves, it takes some force. From your description, it has nothing to do with the axle, so look closer at all the suspension bushings. This is very common.

Like I said, it would be very strange if it were the diff. The diff is a 4 pinion Dana 60 and should be indestructable in a Rover. The splines at the drive members wear out as the drive members are mad from butter.
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  #12  
Old November 13th, 2005, 10:46 PM
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steve
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Thanks guys.

I'll check the a- arm again in the morning with a bigger pry bar, as well as looking for spline wear. I don' t think it is "normal" thump... I have owned a D90 for almost 10 years and it has plenty of play in the drive line. But I'm new to the 110 gig. It really seems to be comming from the back end.

I bet you guys are right... I will check all the suspention stuff first... I think I just got a little ahead of my self wanting an ARB and what not...

How much clunk from the rear is 'normal' for a 110??

Follow-up Post:

Also:

Red90 "I would take a look at the A arm ball joint. They can wear out and you get a clunk right at the diff. If it is gone, get the M-D greasable adjustable ones."

Where do I find the MD ball joints??

Thanks
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  #13  
Old November 14th, 2005, 12:45 PM
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I think lots of Rover parts vendors sell them. Not sure what is convenient for you as I'm in Canada.

I see one here
Quote:
NRC7661S Adjustable Rear Ball Joint
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  #14  
Old November 18th, 2005, 10:53 PM
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steve
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Just to finish off the thread. You guys were right the A-arm ball joint was the problem. after I pulled it I could tell it was shot. The bushings up there were trashed too.

Thanks all
-s
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  #15  
Old November 19th, 2005, 01:49 AM
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Glad it's sorted with no major mechanical mayhem.
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