andynmaas

I had front drive shaft u-joint in transfer case for E350 4 matic broke because it dried and corroded. I have ordered gear and ujoint inside it from Europe but stuck for few weeks in Columbus Ohio DHL because of custom. This is used part so I plan to clean it from corrosion and maybe used high temp paint and used long life grease. First I will use loctite rust resolver. Then I will paint with high temp paint from Eastwood. As last resort I will used long life grease such as Valvoline High Temp Grease NLG2 or Liqui Moly 2003 Mos2 Long-Life Grease or Loctite 234227 LOC51048 Moly Paste Anti-Seize Compound.

Below list of grease from top the I one I prefer:
Loctite 234227 LOC51048 Moly Paste Anti-Seize Compound: AmazonSmile: Industrial & Scientific
AmazonSmile: Liqui Moly 2003 Mos2 Long-Life Grease, 100 ml: Automotive
AmazonSmile: Valvoline Multi-Vehicle High Temperature Red Grease 14.1 OZ Cartridge: Automotive





I still decide between three grease and can not decide which best to protect against corrosion. Please advice what is the best grease to protect this u-joint inside this front drive shaft gear in transfer case of mercedes 4matic

bmwpowere36m3

What’s your plan for getting the grease into the rolling elements? As in, how do you plan to disassemble the joint, remove the caps and re-grease...

andynmaas

I didn't mean to disassemble the ujoints but cover the outer of ujoints with grease. So it will not corroded and dried which what hapenned to this parts when it broke.

MBNUT1

Isn't it going to coat everything around the joint when you hit 60 miles per hour.

andynmaas

That why it enclosed in rubber boot and i hope that can keep grease in the boot. The same as in CV boot of axel which always rotate fast. The problem of that drive shaft ujoint it exposed to heat from exhaust which less than a foot away and that joint it right above enclosed with based floor of the car. So the problem is the heat which worst than what impacted wheel bearing. So the grease must hard like paste form and withstand high temperature.

bmwpowere36m3

I would just spray it with a penetrating or underbody wax if your concerned with corrosion. Maybe once every couple years. Like fluid film, T-9 boeshield, Noxudol or Wurth underbody wax.

The problem is the seals for the cups eventually will deteriorate and let water/dirt into elements... that’s when the life of the joint is done and it’s due to replacement.

andynmaas

That the reason I painted first with high temp paint withstand 1400F then covered with loctite moly paste which also withstand high temp. Every 30k miles i will check the grease and apply again to prevent parts broke because mercedes dont want to sell that part instead force us to buy new transmission for $8k. So we have to buy used parts salvaged from junks car.