transmission oil

[ford31]

ever heard of mixing grease and transmission oil to get the thicker blend saw this dont think i would try it just wondered,

[Joe K]

I've heard of SAE140 oil, grease and powdered graphite. There was an article online somewhere on this - not here.

Powdered graphite is NOT a lubricant.

Sorry. Feeling hot and bothered today.

Joe K

[Jim/GA]

No. Big mistake. Don’t do it.

[whirnot]

Might be a good lubricant, but the shifting would be horrible!

[Purdy Swoft]

I agree and wouldn't try it either !!!!!!! I have used 90 weight gear oil with good shifting results . Its mostly an acquired feel .

[Bob Bidonde]

Sponsored Links (Register now to hide all advertisements)

"......mixing grease and transmission oil to get the thicker blend...."



I have read vintage articles that this is what a dishonest used car dealer would do to quiet a noisy transmission of differential.

[duke36]

Originally Posted by Jim/GA

No. Big mistake. Don’t do it.

Agree with Jim: Get Modern SAE 250 wt. from Resorationstuff. com or others, (Penrite, Lubriplate.) close to the original 600 wt. designed for yellow metals.
The A vendors' "600 wt." appears to be modern SAE 140 equivalent.

[Forddan]

I posted a similar thread a few months ago. It was about STP. After all the suggestions I decided to use this:

https://www.restorationstuff.com/eco...oducts_id=1088

So far so good.

[Benson]

I tried 250 weight in transmission ONCE in year round daily driver ... never again.

That was more than 55 years ago.

When it got down to Zero it was very hard to shift!

At 25 below it was really bad. The shift lever would actually flex (until it warmed up) if I pushed it hard into gear.

I can not imagine what 1500 weight (if that is the real weight of the oil) would be like in the winter!

[Y-Blockhead]

I tried GL1500 from Mike's... once. https://www.mikes-afordable.com/product/GL1500.html
I live in SoCal and it doesn't get that cold here, even in the winter months. But when I took off first thing in the morning I could barely shift. It would take quite a while for the oil to warm enough to be able to shift but was still not to my liking. Went back to 600w.

[Forddan]

I live in MA and I already drove it within 60 to 90 F and haven't seen any difference. But I read many comments like the previous one, so it has to be some truth for sure.

Now, just for my own curiosity, I will put a little in a container and place it in the refrigerator (not freezer as I do not drive the car in winter with the snow here) and check how it feels.

Cheers

[Werner]

Hallo Ford31,
SAE 600 easily additized machine oil is correct. No additives like Graphite, MoS2, Grease, because the main gear shaft runs off too long.

[Patrick L.]

140 or 250 wgt work just fine. Its kinda hard to tell the difference. Specs for 600W fall in those ranges.

One thing, some folks swear by is STP, but, I'm one that swears at it.

[xray zulu]

I use Snyders 600W mixed with molybdenum disulfide powder. Smooth shift, no whine, solid lock up.

[ryanheacox]

600W from Brattons worked well when it was 10 degrees last November and it worked well last week when it was 90. I see no need to mess with what doesn’t need messing with.

[kimlinh]

I use SAE 140 wt. gear oil and it works fine. To thick an oil can be a problem just as to thin can be.

[rotorwrench]

Soaps are blended with oil to make grease. Grease soap is not made for use in anything but grease. The other problem is that there are a lot of different soaps used in making grease. Some are compatible with mineral based oil and some are not. Gear lubes are still available for any usage an old car buff would need if you know where to find it and if you know what specification is required.

[eagle]

Lucas oil stabilizer works GREAT. Transmission is silent and smooth shifting. Great improvement over the 600w the vendors sell.

[Johnny Nitro]

I used 600W, but found the viscosity would vary too widely with weather, and driving conditions for my liking. Been using Redline 80w250 since June. It’s a GLI-5 gear oil, but explicitly states it can be used in our vehicles. So far, I’ve been happy with its performance. We’ll see how thick it gets this fall in the colder weather.

[ryanheacox]

Originally Posted by Johnny Nitro

I used 600W, but found the viscosity would vary too widely with weather, and driving conditions for my liking. Been using Redline 80w250 since June. It’s a GLI-5 gear oil, but explicitly states it can be used in our vehicles. So far, I’ve been happy with its performance. We’ll see how thick it gets this fall in the colder weather.

Yup, GL-5 is perfectly fine in a Model A transmission as there is almost no yellow metal in it save for the reverse idler bushing and cluster thrust washers on early cases.