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EL XR6 diff into EB2 

 

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 Post subject: EL XR6 diff into EB2
Posted: Sat Dec 22, 2007 2:16 am 
Getting Side Ways
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I know the subject of what upper arms to use when fitting an EL diff to an earlier model has been advised on many times, yet despite the accurate info posted by some members, the waters get muddied time and again.
I thought I'd post pics of my recent diff adjustment with the aim of giving someone a visual guide to the solution of my pinion alignment problem.
If your car is lower than mine [-50mm at rear] XR6 arms may be needed to lower the pinion angle even further than the std EL arms I used.
Pic 1: Is of the car to illustrate the ride hight.
Pic 2: BenJ and I re-fitted the larger and longer EB2 arms to see what angle we'd have to fix with either std EL or XR6 arms. [muddied waters]
The rest of the pictures are self explanatory, I think, but if anyone is unclear on them I will be glad to explain what they're meant to highlight.
The last pic is the happy ending, good to 5K rpm smooth and strong, notice the impact marks just up from the uni joint.
After fitting the front bolts of both EL arms to the body, the pinion was lowered by placing the floor jack under the Watts link and gently raising that until the rear bolt holes aligned.
It is much easier having a second person on the jack, I had sadly lost the services of BenJ for this last exercise as I think he could have mastered 'floorjack 101' with a little effort. In his favour he does the complex things well.
All up, less travel time, removing the arms at the wreckers and re-fitting them took less than 2 hours, a quick and easy fix to bad problem.
Paul
PS I must have hit the upload wall, Pics 1 and 2 to follow.

 

 

Attachments:
File comment: Short but strong
IMG_0298 (Small).jpg
IMG_0298 (Small).jpg [ 38.53 KiB | Viewed 48 times ]
File comment: Another View
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File comment: EL bolt and retainer
IMG_0300 (Small).jpg
IMG_0300 (Small).jpg [ 54.2 KiB | Viewed 45 times ]
File comment: One arm in place, note gap.
IMG_0301 (Small).jpg
IMG_0301 (Small).jpg [ 147.09 KiB | Viewed 46 times ]
File comment: Straight enough
IMG_0303 (Small).jpg
IMG_0303 (Small).jpg [ 102.73 KiB | Viewed 57 times ]

 

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Posted: Sat Dec 22, 2007 2:31 am 
Getting Side Ways
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Location: Central Coast
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I should make it clear that the standard arms only fit the front [upper] captive nut location, only the XR6 'bent' arms will fit the lower hole without problems.
Pics 1 & 2 attached. 3 for good measure.
Paul

 

 

Attachments:
File comment: Ride Height
Diffdun (Small).jpg
Diffdun (Small).jpg [ 142.61 KiB | Viewed 48 times ]
File comment: EB2 arms, pinion angle way too high.
IMG_0302 (Small).jpg
IMG_0302 (Small).jpg [ 115.39 KiB | Viewed 60 times ]
File comment: Comparison, EL std arm on top.
IMG_0297 (Small).jpg
IMG_0297 (Small).jpg [ 50.83 KiB | Viewed 44 times ]

 

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Posted: Sat Dec 22, 2007 10:22 pm 
Getting Side Ways
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Ride: EB1 Fairmont Ghia T5 Wagon

Location: Seven Hills, Sydney
NSW, Australia

Excellent write up.

Vote one for addition to Diff Sticky.

Do you think using the standard EL arms in a lowered car with a non EL diff will help with the pinion angle?

BenJ

 

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Posted: Sun Dec 23, 2007 12:24 am 
Getting Side Ways
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Hi Ben,
Good question,
If the pinion is sitting high then it would be worth exploring. Probably the best thing to do is, with the car supported [for those who can't assume such things], undo the rear upper arm bolts and lift the ends clear of the mounting brackets. Place a mark 20mm towards the front, on top of the arm, sit them back in the brackets. Using a jack as described above rotate the pinion down and note when it's level. If the mounting bracket holes align with the mark then the shorter EL arms would probably solve the problem. If it is very close but not exact, it would be up to the individual to experiment to see if the improvement is actually workable.
Hope I have explained that well enough.
The most accurate method would be rotate the diff until the pinion angle is correct, mark the arms at the bolt holes and measure the distance from the front bolts to the mark. If carefully done this should give the length of the arm required.
Paul

 

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Posted: Sun Jan 13, 2008 5:56 pm 
Getting Side Ways
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PaulC and TerroristGhia,
Here is the bump up you asked for, any details you want post here or PM me and I'll send you my phone number.
Paul

 

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Posted: Wed Jan 16, 2008 1:01 pm 
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VIC, Australia

How did u end up going with this?
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Posted: Wed Jan 16, 2008 4:51 pm 
Getting Side Ways
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Age: 70

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Location: Central Coast
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Hi OZFORDAU,
I should have made it clearer I think but in the middle of the first post I wrote:
"The last pic is the happy ending, good to 5K rpm smooth and strong".
It's still going really smooth up to 5200RPM [only for testing] loaded and empty and I'm very happy with the result.
I haven't had the pinion angle properly measured yet but as I'm up for a wheel alignment soon, I'll get it done then just for the record.
Total cost $70 plus 2hrs total time @ wreckers/home.
Cheers,
Paul

 

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