Ooops - Moly Grease in the U-joints!!!

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AppleTech

AppleTech

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I accidentally used my moly grease gun loaded with Valvoline "Moly-fortified Multi-Purpose Grease - Ford-Lincoln-Mercury", part# VV633. It says "for universal joints" on it, but I didn't mean to put this type in there. Am I going to be OK or am I going to have problems?

Thanks,
Phil
 
Your truck will behave the same as if you use a non-OEM oil filter.


You're screwed.

-Spike
 
-Spike- said:
Your truck will behave the same as if you use a non-OEM oil filter.


You're screwed.

-Spike
Click to expand...

So I better have it towed to the dealer and have the entire drivetrain replaced? :D

Well that helps allay some fears - what are the arguments of using Moly grease versus non-moly grease for this application?

Thanks,
Phil
 
If I remember right, Valvoline puts very minimal amounts of moly in that grease. If you want to dilute it even more, pump a bunch of non-moly in there.

A true high content moly grease might cause the bearings to slide instead of roll. They might develop flat spots, accelerating wear.
(Edited 9-8-2019 to correct my mistake- if it's too slippery to roll, it's too slippery to wear. Dunno where I got this idea, but it's BS. Realized I made this stupid statement when it was 'liked' 11+ years after the fact, please don't pay it any more attention. Do pay attention to the following statement, not edited.)

Before you take any of my advice though, you should know that I use the same Valvoline semi-synthetic moly-fortified grease in everything- wheel bearings, birfields, trunion bearings, u-joints, TRE's, ball joints, cake pans, poached-egg cups, etc. I live on the edge. I'll buy only Toyota thermostats, belts, wires and other stuff, but I use aftermarket oil filters, coolant, light bulbs... think twice before you follow my lead. :D

-Spike
 
Last edited:
-Spike- said:
If I remember right, Valvoline puts very minimal amounts of moly in that grease. If you want to dilute it even more, pump a bunch of non-moly in there.

A true high content moly grease might cause the bearings to slide instead of roll. They might develop flat spots, accelerating wear.

Before you take any of my advice though, you should know that I use the same Valvoline semi-synthetic moly-fortified grease in everything- wheel bearings, birfields, trunion bearings, u-joints, TRE's, ball joints, cake pans, poached-egg cups, etc. I live on the edge. I'll buy only Toyota thermostats, belts, wires and other stuff, but I use aftermarket oil filters, coolant, light bulbs... think twice before you follow my lead. :D

-Spike
Click to expand...

Damn- you live on the edge! :eek:
 
FWIW I only use one grease on my truck. Amsoil GHD with moly. Good for everything. Had a lengthy discussion with an Amsoil tech support dude years ago when I was concerned with the sliding bearing theory that was brought up on the 80SCool list in the late 1990s. After almost 17 years on the original front driveshaft, I'm OK with it now. Birfs are original as well.
 
Wow, I can't believe the grease or OEM guru's haven't come unglued on this thread. :D
No one has a different opinion?

-Spike
 
I've used moly in everything for the last 2 years. no probs yet.
 
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