PennGrade 1 Classic or Driven Racing Conventional GL-4 Manual Trans Gear Oil

[SubieRubyRoo]

What I've read is from multiple actual owners with actual experience. I don't doubt leaking is due to wear, but if you have an old trans with wear shouldn't you use the best product for that situation? And I'd bet the tolerances in these old gearboxes, with technology that goes back to the 50's if not the 40's, is a lot looser than what's made today. Bottom line is these same people with real world experience report a lot less leaking problems with conventional. If there's a way to use synthetic and prevent it from leaking please let me know.

Concerning Driven, all I know is they specialise in oils for all kinds of racing, old cars and new, including Nascar programs that spend and invest millions. But maybe the whole company is nothing more than a smoke and mirror act?

Yes I came here for advise, not a pissing match or an argument, so thanks and goodbye

You do realize that any perceived improvement in leakage by running conventional is likely due to the fact that it’s not keeping the equipment as clean, and then the accumulated crud is simply blocking the holes that it was previously leaking out of anyways, where the synthetics are actually keeping it cleaner and therefore exposing said already-leaking seals?

I haven’t seen any pissing match or arguing here, just people asking you to challenge your acceptance of prior bad information you digested and internalized. This thread so far has been tamer than most!

 

[Held for Ransom]

So, my '73 Pontiac says to use GL-5 spec. lube in my transmission. Did I goof by using the PennGrade 1 fluid?

 

[kschachn]

So, my '73 Pontiac says to use GL-5 spec. lube in my transmission. Did I goof by using the PennGrade 1 fluid?View attachment 210163

Is that an API GL-5 fluid?

 

[Held for Ransom]

Doesn't say, does it.

 

[kschachn]

Doesn't say, does it.

Then don’t use it would be my suggestion.

Unless you’re being held for ransom or something.

 

[oliver88]

I have a 1962 BN7 Austin Healeyy 3000 and tried many different transmission lubes...Everything from ND 30 weight to 20w50 VR1, etc, etc. Nothing worked as well as Redline MT 90 ...It's all that I will ever use in this cars transmission.

 

[930.engineering]

If there's a way to use synthetic and prevent it from leaking please let me know.

This answer has already been given before:

If you have any leaks, fix it. Don't blame the oil. Its not 1970 anymore.

backed by this contribution:

Leakage is caused by worn seals or cracked gaskets. Shaft seals finally wear out.

Excessive "wobbling" of shafts, due to worn bearings, can beat seals to death.

@ras61, you should consider yourself lucky due to MolaKule, kschachn,
SubieRubieRoo and Greasymechtech have hand out an advice that you
won't get in 'ordinary' forums. Don't be snitty just because you might
perceive that advice given as unexpected.
When a member regives some forum and marketing blabbering someone
needs to contradict to him. That isn't presumptuous at all, it's just honest
and this case also true.
.