 
			
				06-14-2018, 12:02 AM
			
			
			
		  
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				 CC Member 
				
				 
				
				
							  
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					Join Date: May 2018 
					Location: Denver, 
						CO 
					Cobra Make, Engine: Superformance Mk3 with Roush 427R 
					
					
						Posts: 77
					 
					
					
					
					
					     
				 
				
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		Since there were no replies, I thought I would post what I found out.... 
The '04-'06 era chassis use a Pontiac GTO Dana LSD unit. The axle seals are a failure point and are replaceable in the car. The parts needed are as follows: 
 
(2) GM Shaft Seals: 92140236 (about $22 each from Tasca parts) 
(2) Torco RGO Racing Gear  Oil A248514CE 85W140 1 Liter (Summit Racing, it takes just under 2 liters) 
(1) Torco Type F Friction Modifier AFM0050JE 4oz (Summit Racing, you add 2oz at the beginning or middle of the fill)
 
The Torco is the preferred  oil of the GTO crowd to deal with whine and clunking issues.  
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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