Alternate transmission lubricant?

[bonhommechristopher]

I need to change the manual transmission lubricant in my '03 Liberty sport, 4 cylinder. I visited a dealer to get a price quote on the fluid, Mopar 75W-85, and found out that it would cost me upwards of $70 for just the lubricant. Is there a big difference between gear oils such as 75W-85, 75W-80, or 75W-90? It would save me a lot of money if I could put 75W-90 or 80 in my transmission. I am going to be doing an oil change and rear differential change this weekend, so I am going to be spending enough as it is. Also, are there any filters that I need to change in the transmission system that I need to change? Thanks!

 

[Ry' N Jen]

Use what's recommended by the manufacture and don't cheap out.
At the end of the day it's still less expensive than replacing the gear box.

 

[belvedere]

I've heard good things about the manual trans lubes from AMSOIL, Redline, etc.

 

[rockymountain]

I"m not suggesting anything, but this is a good read:

Lubricant for New Venture Gear 3500, 4500, and 5600 Transmissions

And then have a look at this:

AMSOIL - Synthetic Manual Transmission and Transaxle Gear Lube 75W-90 (MTG)



What you don't want is common GL-5 oil. You want a GL-4. The manual must have some soft and intricate parts inside that require special treatment. I never thought a quart of oil would cost $35. :freak3::freak3:p:

 

[k99jk99j]

i thouht the nv1500 took syncromesch fluid?

 

[rockymountain]

Honestly I wouldn't touch it unless you're having problems like hard to shift or water intrusion.
It's supposed to be good for life.... :shrug:

 

[bonhommechristopher]

Thanks for the advice!! Rockymountain: Really? It is supposed to be good for life? My hanes manual says it is supposed to be changed every 30k miles. Maybe that is only for ATF. That would explain why it has performed fine since my dad bought it 7 years ago.

 

[rockymountain]

Not sure. Check the real manual. Hanes has general info usually at best.

 

[Ry' N Jen]

Not sure. Check the real manual. Hanes has general info usually at best.

Hanes book of lies!