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Transmission and Differential service w/synthetic

2K views 2 replies 3 participants last post by  topDog 
#1 ·
I need to change the gear oil in my tranny and diff in my 03 wrx- it doesn't take any additives in the diff liek other cars with limited slip does it? Will 70-90 wt be ok in both? im using redline synthetic, thanks.

Thanks
 
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