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Kirkham Motorsports

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  • 1 Post By fastd
  • 1 Post By spdbrake
  • 3 Post By patrickt
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Old 04-04-2021, 11:07 AM
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Default Limited Slip Additive

The ERA manual indicates that Amalie limited slip additive (part #505-6775) is the recommended lube.
I don't see that available any longer...any recommendations ?
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Old 04-04-2021, 11:52 AM
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Amalie Oil Co. They still make it.

https://www.racecareng.com/item/5391...category=63421
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Old 04-04-2021, 12:10 PM
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Ok. Thanks. The part number is different; I think I’m gonna go with red line; not easy enough to find the Amalie

Separate question: anyone have a part number for the differential drain plug for the ERA with a jag rear?
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Old 04-04-2021, 01:27 PM
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Quote:
Originally Posted by fastd View Post
Ok. Thanks. The part number is different; I think I’m gonna go with red line; not easy enough to find the Amalie

Separate question: anyone have a part number for the differential drain plug for the ERA with a jag rear?
Use the GM Limited Slip Additive Part #1052358, now #88900330, (I use about seven ounces total) and a quart and a third of Moroso Climbing Gear Lube Part #34800, which is red in color. Do NOT remove the lower plug to drain the fluid. Instead, suck it out of the fill plug. I use a Plews 55001 Lubrimatic Fluid Quart Pump and surgical tubing.
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Old 04-04-2021, 08:26 PM
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Thanks
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Old 04-06-2021, 07:08 AM
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Quote:
Originally Posted by patrickt View Post
Use the GM Limited Slip Additive Part #1052358, now #88900330, (I use about seven ounces total) and a quart and a third of Moroso Climbing Gear Lube Part #34800, which is red in color. Do NOT remove the lower plug to drain the fluid. Instead, suck it out of the fill plug. I use a Plews 55001 Lubrimatic Fluid Quart Pump and surgical tubing.
Patrickt,

Would be interested in any feedback regarding specific use of
Moroso 34800 in reference to this:

https://www.stevesnovasite.com/threa...r-lube.116544/

Here's the body content from the above link:

I installed CLIMBING GEAR LUBE! Moroso 34800 Gear Oil.

I went to the track a few weeks ago and noticed rear end noise was louder
and on the street same result. Less than 1000 miles on car sense oil change.
So I decided I would go ahead and change the gear, I want to do this to slow
the car down for rules and also better street use and try to keep the car in
the 7.50 range for a new heads up class in Atlanta, GA.

Upon tear down and inspection I find, Every bearing is toast, the spider gear
idlers in the posi are goaled up. Had to cut the cross pin out with a gas wrench!
Wheels bearing have been running dry! Axles are toast!

After further consulting with some company's! This oil should never be used in
a open differential, posi or oil bath lubed bearings as in a GM c-clip rear axle.
(Unless you put 3 total quarts in) Moroso denies any of this!

This oil has a high self adhesive additive (keeps the oil from slinging)
that lubes the ring gear and starves the other parts of the rear end.
Seems to be a known cause when talking to some differential builders.


It is also noted that other brand climbing gear oils do not have the self adhesive
additive,(keeps the oil bonded together) they have a material bonding additive,
attachés to parts. The oil will separate.The separation is what allows the oil to
travel down the axle and inside the differential. In talking with some other
company's that have climbing gear lube say, the Moroso oil gives the "CLIMBING"
name a bad one when used in stock configured differential. The biggest problem
they hear about is in the 4X4 guys.

The Moroso oil is used in "drag racing" a spool and seal axle bearing that require
no lube is sufficient.

Last edited by Unique427; 04-06-2021 at 07:14 AM..
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Old 04-06-2021, 07:50 AM
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Quote:
Originally Posted by Unique427 View Post
Patrickt,

Would be interested in any feedback regarding specific use of
Moroso 34800 in reference to this:
Yeah, I've seen that thread. I would initially dismiss it as an outlier -- certainly for independent Jag-based rears where the lube doesn't have to make it all the way out to the wheels. Rebuilders of Jag differentials have been recommending Moroso for decades. Now, the amount of limited slip additive can vary depending on your build. Four ounces and I ratchet, seven ounces and I only experience a "now and then" noticeable ratchet release on my Powr-Lok. Here's a thread on the breakaway torque Breakaway Torque on ERA's Powr-Lok Now, is "climbing lube" really more marketing than it is physics? I don't know. If I did not have a Jag based Powr-Lok, and the rebuilder told me not to use Moroso Climbing Lube and to use ACME 90 Weight instead, then I'd listen to him. Here's a vid on climbing lube, for what it's worth.

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