Gl-5
Post Fiend
Joined: Jan 2000
Posts: 5,860
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From: Metro Detroit (Redford)
I don't think so. GL-5 should only refer to the level of anti-wear, extreme pressure additives, not whether it is limited slip. I believe you need either a special limited slip gear lube or an additive. That's my guess anyway.
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Postmaster
Joined: Dec 2003
Posts: 2,659
Likes: 2
From: S/C Texas
Not counting the synthetics......Chevron and Shell both offer a gear oil with the LS additive package already in place.
The only two designations are GL-5 and MT-1.
I guess there is no actual official designation to seperate the LS from the non-LS packages.
The only two designations are GL-5 and MT-1.
I guess there is no actual official designation to seperate the LS from the non-LS packages.
Posting Guru
Joined: Oct 2003
Posts: 1,332
Likes: 4
From: Baltimore
Ford recommends using LS lube with Motorcraft Synthetic gear oil. I wasn't aware some synthetics had it already in there. Does Chevron and Shell mark the container as having LS additive built in?
Postmaster
Joined: Mar 2001
Posts: 4,968
Likes: 3
From: So Cal
The way to tell if you need LS additive is, IF it chatters on slow tight turns, especially in reverse, you need to add LS additive. On my 94 F250 4x4 with 4.10 gears, I add two 8oz tubes of Sta Lube LS Additive to Valvoline syn.
On my chebby Impala SS I use 2 tubes of LS Additive with M1 syn. Impala member's experience is with 1 tube and syn it will chatter.
Good Luck,
Jim Henderson
On my chebby Impala SS I use 2 tubes of LS Additive with M1 syn. Impala member's experience is with 1 tube and syn it will chatter.
Good Luck,
Jim Henderson
Post Fiend
Joined: Jun 2001
Posts: 5,228
Likes: 5
From: Running Springs CA
Most Redline gear oils have the additive already in there and it really works. Mobil One and Valvoline synthetic gear oils claim to have it, but I still got chatter. No chatter with the Redline. Not needing the additive made up for the cost difference.
Jim
Jim
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Postmaster
Joined: Dec 2003
Posts: 2,659
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From: S/C Texas
Yes, Chevron and Shell both have LS in the names.
Have a Chevron distributor in town.....gonna give em call in the mornin, see if ican get the stuff in less than a drum.
Have a Chevron distributor in town.....gonna give em call in the mornin, see if ican get the stuff in less than a drum.
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