Am I in trouble??
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Am I in trouble??
So I recently had GM 4.10 put in my 2002 ws6. The shop that did the swap for me used Valvoline 80/90 lubricant. After looking in my owners manual, I see that it suggests I use a SAE 75W-90 Synthetic axle lubricant since it's a limited-slip differential. Am I going to run into trouble or have problem since they didn't use synthetic? I was also about to change lubricant after my 500 miles break in period so I'm curious if I should stick with the 80/90 or go over to a SAE 75W-90 synthetic and add the 4 ounces of limited-slip axle lube additive it suggest I use during a complete drain and refill.
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Thanks
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So that's it? Nobody else can give any feedback on weather or not running the conventinal lube 80/90 may have hurt anything and if I should switch to the synthetic when I change fluids this week?
#6
I know alot of guys run conventional all the time but most do run it during the break in. I really don't think it matters that terrible much as long as you've got the additve in and its some kind of gear oil I put syn. 75w90 when i put my 4.10's in but i have torsen diff so I didn't need the additive in my car. As long as it was set up correctly and you put 4 oz of additive in and fill the rest with gear oil you're rear end should last you a good long time (as long as you don't over power it ) the only benifit of syn is that it doesn't succome to thermal breakdown as fast so fluid changes are few and far in between.