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wrenchmonster · 04-03-2006, 05:30 PM

I think the Detroit requires LSD fluid. The vibration you are describing when it's in 4wd and underload is text book wrong fluid. I've seen a lot of this on GM product on rear limited slips where owners or the lube shops don't put in an LSD additive like BG.

For the cost of new fluid, it's worth a shot to change the fluid out and add a LSD additive and keep your finger crossed. Unfortunately, the damage may already be done. Even changing out the fluid may not help. The only way you can tell would be to take the 3rd member out and inspect clutches and clearances.

04-03-2006, 05:30 PM	#13 (permalink)
wrenchmonster Contributing Member Join Date: Jan 2005 Location: WA State Posts: 660	I think the Detroit requires LSD fluid. The vibration you are describing when it's in 4wd and underload is text book wrong fluid. I've seen a lot of this on GM product on rear limited slips where owners or the lube shops don't put in an LSD additive like BG. For the cost of new fluid, it's worth a shot to change the fluid out and add a LSD additive and keep your finger crossed. Unfortunately, the damage may already be done. Even changing out the fluid may not help. The only way you can tell would be to take the 3rd member out and inspect clutches and clearances.