Re: Redline Gear Oil: NS or not ??

[Gerry Lehmann <lehmann@domain.elided>]

Sorry Joe, but yes Nizam is correct. 75-90 and 75/90NS are both GL5 oils
suitable for hypoid gears but the NS has no slip additive as required by
LSD clutches.  Therefore the NS product it is not Redline's recommended
oil for LSDs and the bottle does read appropriately as he described. 
(NS is however, in my experience, the correct choice for a non-LSD
transaxle).

The problem is that the same slip additive which reduces LSD chatter in
the regular 75-90 can cause slower synchro engagement in the gear box. 
Judging from the final line of your note that might be your issue.

The following URL from Redlines's additive page may better describe the
approach of blending minimal additive that I recommended to Nizam in my
previous post.  It will also confirm that the NS product is the one
WITHOUT the LSD additive.

http://www.redlineoil.com/redlineoil/lsdfmbti.htm

Gerry Lehmann
'86 GTV6 - soon to need a slip additive


> 
> Are you sure?  It was my understanding that the NS formula was *for*
> limited-slip applications ("NS"="non-slip") and that it differed from
> the others in that it lacked an extra-slippery additive that Redline
> puts in all their other oils.  The idea is that the extra-slippery
> formula is too slippery for conventional friction-based LSDs to
> properly get their friction on.  The debate has always been which to
> put in non-LSD Alfas to get the most out of marginal synchros.  For
> an LSD transaxle, such as your Platinum, it has always been my
> understanding that the NS formula was the only way to go.  Someone
> correct me if I'm totally wrong, please.
> 
> Joe Elliott
> '82 GTV6
> (with Redline 75w90 since I bought the box from APE 15k mi ago, and
> rather disappointing--it'll be 75w90NS next time.)

--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided