M21 Oil Weight/Brand Recommendation
 

Tried our search... no joy. Sorry, as I am sure this has been discussed. This is for a 70 442.

Thanks!

Re: M21 Oil Weight/Brand Recommendation
 

Sam, I did some research on this a while back. What I found and use in all my Muncies is Pennzoil Gearplus SAE 80W-90W GL4. The GL4 works best with the brass syncros.

Re: M21 Oil Weight/Brand Recommendation
 

good choice Tony.

Re: M21 Oil Weight/Brand Recommendation
 

Thanks guys!

Re: M21 Oil Weight/Brand Recommendation
 

I'm using CRC GL-4 as directed by the man who built the Muncie in my Chevelle.

Link

Re: M21 Oil Weight/Brand Recommendation
 

[img:left]http://i764.photobucket.com/albums/x...OTOS/23304.jpg[/img]

Re: M21 Oil Weight/Brand Recommendation
 

I like pixtures!!!!!!!!!! [img]<<GRAEMLIN_URL>>/grin.gif[/img]

Re: M21 Oil Weight/Brand Recommendation
 

Sta-lube stuff above is what is in mine. Works fine. I think I got it through Amazon.com, but I know NAPA stores carry it as well. My local store didn't have the qt size, so I just mail ordered.

Re: M21 Oil Weight/Brand Recommendation
 

Royal Purple:

Synchromax – Manual Transmission Fluid

Synchromax is a manual transmission fluid that increases performance and the life of your equipment. It improves shifting, reduces gear noise and increases power transfer to the wheels. It also lowers operating temperatures and provides outstanding wear protection for longer transmission life.

Synchromax is recommended for manual transmissions that specify an automatic transmission fluid. It’s also ideal for 4×4 transfer cases and motorcycle gear boxes. Synchromax is fully compatible with all types of friction materials. It provides excellent corrosion and oxidation protection without affecting the soft metals commonly found in manual transmission synchronizers.

Synchromax is formulated with Royal Purple’s proprietary Synerlec technology for unsurpassed performance and protection.


Max Gear – High Performance Gear Oil

Max Gear is recommended for use in truck and automotive front or rear differentials, manual transmissions and lower gear units of marine engines that specify use of an API GL-5 or GL-4 fluid. It is non-corrosive to soft yellow metals (brass, bronze, copper, etc.) and synchronizer safe

Max Gear is an ultra-tough, high performance automotive gear oil designed to provide maximum protection to heavily loaded gears while maximizing power throughout the drive train. Max Gear outperforms ordinary gear oils by combining the highest quality synthetic oils with Royal Purple’s proprietary Synerlec additive technology. Max Gear makes gears run smoother, quieter, cooler and longer without overhauls. Max Gear is formulated with a friction modifier additive – no additional additives are necessary.

Max Gear is available in the following viscosities: 75W-90, 75W-140, 80W-90, 85W-140 and SAE 90

Re: M21 Oil Weight/Brand Recommendation
 

Sam, if you do not drive them you can run water if you want. Only need gear lube if the car is not a lawn ornament.

Re: M21 Oil Weight/Brand Recommendation
 

What ever you do -- DO NOT run ATF in a Boggie Woggie or a Munchie ... some ( I think MoPar) used to recommend ATF.

The TAZ

Re: M21 Oil Weight/Brand Recommendation
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: [email protected]</div><div class="ubbcode-body">Sam, if you do not drive them you can run water if you want. Only need gear lube if the car is not a lawn ornament. </div></div>

Thank you, Samuel, for taking the time to post your thoughts. Would that be distilled or regular tap water? ...... [img]<<GRAEMLIN_URL>>/no.gif[/img] [img]<<GRAEMLIN_URL>>/hmmm.gif[/img] [img]<<GRAEMLIN_URL>>/bs.gif[/img] ........... [img]<<GRAEMLIN_URL>>/naughty.gif[/img]

Re: M21 Oil Weight/Brand Recommendation
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: earntaz</div><div class="ubbcode-body">What ever you do -- DO NOT run ATF in a Boggie Woggie or a Munchie ... some ( I think MoPar) used to recommend ATF.

The TAZ </div></div>

Some of the Tremecs use ATF [img]<<GRAEMLIN_URL>>/dunno.gif[/img]

Re: M21 Oil Weight/Brand Recommendation
 

Regular tap water. has a few more minerals in it for lubrication. Alot of trans guys do not like synthetic gear lube in the old cars. Atleast that is what they tell me.

Re: M21 Oil Weight/Brand Recommendation
 

The GL4 is for the Muncies and Borg Warners etc. It has to do with the &quot;yellow metals&quot; in the transmission. The newer transmissions like the Tremec call for the ATF which is a GL5 oil.

<span style="font-weight: bold">Click Here</span>
http://www.amsoil.com/shopres/products/900px/MTG.jpg

<span style="font-weight: bold">Click Here</span>

I sell a lot of this GL4 AMSOIL to hotrodders locally as well as the Cummins truck guys using the NV4500 transmission. I swapped it into my stuff a few years ago and noticed a big difference. I am a dealer and will be happy to help if anyone needs some shipped or you can just use my referral # 2011844 to knock a few bucks off the price.

Tommy [img]<<GRAEMLIN_URL>>/3gears.gif[/img]

Re: M21 Oil Weight/Brand Recommendation
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: VintageMusclecar</div><div class="ubbcode-body">I'm using CRC GL-4 as directed by the man who built the Muncie in my Chevelle.

Link </div></div>

My guy here in WI, same recommendation as well for my M22W.

Re: M21 Oil Weight/Brand Recommendation
 

I'm running CRC Sta-Lube Hypoid-SAE 85W90 Gear Lube API/GL-4....... which is what my trans guy TOLD me to use. I believe CRASH recommends it also. You can get it a NAPA.

Kurt

Re: M21 Oil Weight/Brand Recommendation
 

Looks like a lot of us are running the sta-lube/CRC 85W-90 juice. I think it's what Autogear recommends as well. My car is far from a lawn ornament, and it seems to work fine for.. ahem.. &quot;spirited&quot; driving. [img]<<GRAEMLIN_URL>>/wink.gif[/img]

I built my own trans and have been running this stuff since it was put together. Cheap, and available at NAPA and Amazon.

Re: M21 Oil Weight/Brand Recommendation
 

Love to hear &quot;spirited driving.&quot; Thats the stuff to use then.