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Need help with Diff just installed 

 

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 Post subject: Need help with Diff just installed
Posted: Sun Nov 26, 2006 5:41 pm 
Oompa Loompa
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Age: 32

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Joined: 26th Jul 2005

Ride: Hybrid EL Futura

Location: Cessnock/Singleton
NSW, Australia

Hey i've just installed a LSD in my car and now when driving around there is a vibration running through the car. It seems to be the faster i go the more it vibrates, especially when back off the throttle.

Just need some help as to what the problem could be?

 

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Pacemaker Extractors, Hi-Flo Cat, Lukey Ultra Flow 2 1/2" Cat back, King Super-Lows, KYB Shocks, 18% Tint, RPD R4 Cam, Vernier Gear, Full Alpine Stereo, 16" Speedy Holotype R rims, Stage 1 Shift Kit, 3.45:1 LSD

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Posted: Sun Nov 26, 2006 6:02 pm 
Smokin em up
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Location: Perth
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Sounds like an out of balance tail shaft - could be how the tailshaft is connected to the diff. Try and rotate 90 degrees, see if that fixes it.
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Posted: Sun Nov 26, 2006 6:15 pm 
Oompa Loompa
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Ride: Hybrid EL Futura

Location: Cessnock/Singleton
NSW, Australia

The diff seems like it leans forward alot to, with the mounting brackets on top does it have to be in the front hole or the back one?

 

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Pacemaker Extractors, Hi-Flo Cat, Lukey Ultra Flow 2 1/2" Cat back, King Super-Lows, KYB Shocks, 18% Tint, RPD R4 Cam, Vernier Gear, Full Alpine Stereo, 16" Speedy Holotype R rims, Stage 1 Shift Kit, 3.45:1 LSD

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Posted: Sun Nov 26, 2006 8:49 pm 
Smokin em up
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is the car excessively lowered? maybe try the other hole, and see how that goes.
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Posted: Sun Nov 26, 2006 9:18 pm 
Oompa Loompa
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Age: 32

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Ride: Hybrid EL Futura

Location: Cessnock/Singleton
NSW, Australia

Its only got King Super Lows in it but yeah i will try the other holes and try rotating the tailshaft to. Thanks for your help

 

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Pacemaker Extractors, Hi-Flo Cat, Lukey Ultra Flow 2 1/2" Cat back, King Super-Lows, KYB Shocks, 18% Tint, RPD R4 Cam, Vernier Gear, Full Alpine Stereo, 16" Speedy Holotype R rims, Stage 1 Shift Kit, 3.45:1 LSD

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Posted: Sun Nov 26, 2006 9:21 pm 
Getting Side Ways
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yeah did you mark the uni joints on the tailshaft when you took it off?sounds like that is definatly your problem
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Posted: Sun Nov 26, 2006 9:21 pm 
Getting Side Ways
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yeah did you mark the uni joints on the tailshaft when you took it off?sounds like that is definatly your problem
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Posted: Sun Nov 26, 2006 10:18 pm 
Oompa Loompa
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Well one of my mates did most of the work for me because i've never done it before but i dont think he marked anything

 

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Pacemaker Extractors, Hi-Flo Cat, Lukey Ultra Flow 2 1/2" Cat back, King Super-Lows, KYB Shocks, 18% Tint, RPD R4 Cam, Vernier Gear, Full Alpine Stereo, 16" Speedy Holotype R rims, Stage 1 Shift Kit, 3.45:1 LSD

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Posted: Sun Nov 26, 2006 10:53 pm 
Smokin em up
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yeah theres noting to mark anyway when replacing the rear axle. The part you mark gets replaced anyway.

Just try and rotate it the 90 degree, and see how you go.
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Posted: Sun Nov 26, 2006 11:13 pm 
Fordmods Junkie
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Ride: Kia Rio - 1.4L Auto

Power: 238 rwkw

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What car did the diff come from?

Your profile says EL Futura. Either the diff is from an EF - possible - or its an EL diff and the arms were installed in the wrong holes - the XR mount points rather than the standard mount points - which are the front holes, half way up the bracket. The rear most holes are for the XR arms, and the uppermost hole is not used.

If hes put the standard arms in the XR holes, this will tilt the diff forward heaps.
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Posted: Sun Nov 26, 2006 11:15 pm 
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did you replace the whole diff or just the hemisphere?


if the whole diff, whats its history? what/where did the old diff come from?

At worst. the diff could be bent.

If all original arms have been installed and the live axle has only been replaced, nothing should need adjusting.

are all brakes clear and not grabbing?

 

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Posted: Sun Nov 26, 2006 11:32 pm 
Oompa Loompa
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Ride: Hybrid EL Futura

Location: Cessnock/Singleton
NSW, Australia

The diff is from a EL XR6. So that means we should've used the front holes not the back ones? I'm hoping thats all it is because thats an easy fix. Will try it in the morning. Thanks

 

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Pacemaker Extractors, Hi-Flo Cat, Lukey Ultra Flow 2 1/2" Cat back, King Super-Lows, KYB Shocks, 18% Tint, RPD R4 Cam, Vernier Gear, Full Alpine Stereo, 16" Speedy Holotype R rims, Stage 1 Shift Kit, 3.45:1 LSD

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Posted: Sun Nov 26, 2006 11:37 pm 
Fordmods Junkie
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Ride: Kia Rio - 1.4L Auto

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Location: Westside
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I think everyone missed the clues about the diff being tilted far forward. :wink:

And I guessed it was from an XR, as the captive nut would be pushed in the rear most hole, and the paint would be marked from the bolt head. Your mate would have just assumed it was the right hole.

But since you still have the standard upper arms, the nut needs to be pushed upwards to the middle/front hole and the arm installed there.

Unless you want to get some EL XR arms to install to keep the diff vibration free... Which I seem to have a set of for sale. 8-)
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