RL MTL to PZ Synchromesh?

[deeter16317]

I have a NV5600 that currently sits with just shy of 270k on the clock...it has seen lots of different synchromesh fluids, but for about the last 150k; it has had a pretty steady diet of Redline MTL or a mix of Redline MTL and MT-90 (this predates the 75w80 they came out with) as it seemed to shift the best. The trans calls for synchromesh...

I'm putting less miles on and Pennzoil Synchromesh is a lot easier to get...

Is there any real reason I should avoid swapping?

 

[mechtech2]

MTl IS a synchromesh type gear oil. It is very good.
Nothing wrong with Pennzoil synchromesh - it is a dino though.
Redline and Amsoil are full synthetics.
I like full synths in any trans.

 

[aquariuscsm]

RP Synchromax is an option too.

 

[deeter16317]

I know they are both synchromesh fluids...I've probably ran almost every synchromesh fluid in this at least once.

I'm just wondering if the RL cost and lack of availability really makes it that much better? I could theoretically change the PZ twice as often for the same cost...and get it locally.

I did the RP deal, it doesn't work well in my trans...works well for others, just not real well in mine.

I'll probably just use RL, don't fix what's not broken; or what seems to work well in this case.

 

[jaj]

The RP Syncromax fluid seems to work best in boxes that call for an ATF type of transmission oil.

I'm with the "if it ain't broke, don't break it" philosphy. That said, the GM style fluids like Pennz will probably work just fine. One that should easy to get, is full synthetic, and is getting great reviews in the Ford Mustang community for good shifting in the Ford/Getrag MT82 transmission is BG Synchroshift II. It's a GM style fluid available from many car dealers and independent shops and it works really well. If you want to give it a go, go to the BG website and look at the very bottom of the page for their find-a-dealer link. I recently checked a zip-code in San Jose and there were 20 dealers within a 10 mile radius.

 

[MolaKule]

The Redline MTL 70W80 is just slightly higher in viscosity than the Pennzoil Synchromesh, has a greater viscosity index, and will probably last longer than the Pennzoil Synchromesh.

 

[nleksan]

Redline (in my case D4) shifts smoother, has shown less wear, operates 4-10* cooler (street and track), and actually reduced.drivetrain loss... I use nothing else anymore.
(actually showed +2.5whp consistently, although that number is from a car that was at the time making over 375rwhp, so we are talking a small gain, but present nevertheless)

 

[deeter16317]

ATF isn't an option in this transmission...its either synchromesh, or synchromesh.

 

[mechtech2]

deeter -
Even if it DID say ATF, I'd be using real manual trans lube.

 

[nleksan]

I understand, I was just giving an anecdote of my experience with the brand.

 

[ltslimjim]

I'd use Red Line MTL or Amsoil's MTF before the Pennzoil, jmo.