|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
03-08-2021, 07:15 PM | #1 |
Senior Member
Join Date: Feb 2021
Location: Troutman, NC
Posts: 717
|
Synthetic Gear Oil
Ok so what gear oil do you use and what weight? Synthetic or non-synthetic? From what I have read about the vendors 600W oil is about the same as 140w.
Do you use the same gear oil for steering box, trans, and rear end? I just got my car so I plan on changing them all in the near future but I cannot decide on 140w or 250w. People say 250w makes for smoother shifts in the trans and helps with engine braking but I would like to hear from people who have used both. Thanks Ron |
03-09-2021, 08:26 AM | #2 |
Senior Member
Join Date: May 2010
Location: Long Island, NY
Posts: 3,463
|
Re: Synthetic Gear Oil
I run SAE 75W140 synthetic gear oil in the transmissions and differentials of my Model A's. I have been doing this for many years (thousands of miles) without any issues. This gear oil withstands the high heat and large forces of modern car differentials, so it is superb for Model A's and AA's.
__________________
Bob Bidonde |
Sponsored Links (Register now to hide all advertisements) |
|
03-09-2021, 08:29 AM | #3 |
Senior Member
Join Date: Feb 2021
Location: Troutman, NC
Posts: 717
|
Re: Synthetic Gear Oil
Does anyone know who carries the 250W oil? Also if you used it does it make for smoother shifts? Still working on my 3 to 2 shift so that's why I am interested in 250W.
|
03-09-2021, 09:46 AM | #4 |
Senior Member
Join Date: May 2010
Location: on the Littlefield
Posts: 6,158
|
Re: Synthetic Gear Oil
A place that sells industrial lubricants--- I got a pail of shell Omaha 680, -- 600W steam cylinder oil is listed for use with steam engines, and worm gears, then there's the 600 series of gear lubricants, listed uses are spur gears and bevel gears, this is what I got
|
03-09-2021, 11:01 AM | #5 | |
Senior Member
Join Date: May 2016
Location: Glide, Oregon
Posts: 1,339
|
Re: Synthetic Gear Oil
Quote:
__________________
Ruth "Sometimes you really DO need to read the whole thread" |
|
03-09-2021, 11:04 AM | #6 |
Senior Member
Join Date: May 2016
Location: Glide, Oregon
Posts: 1,339
|
Re: Synthetic Gear Oil
Sponsored Links (Register now to hide all advertisements)
__________________
Ruth "Sometimes you really DO need to read the whole thread" |
03-09-2021, 11:13 AM | #7 |
Senior Member
Join Date: Apr 2018
Location: Mebane NC
Posts: 2,353
|
Re: Synthetic Gear Oil
Mike's carries ISO 1500 oil, which is the same viscosity as the 250. I've used it and it seemed fine.
|
03-09-2021, 11:42 AM | #8 |
Senior Member
Join Date: May 2010
Location: Largo Florida
Posts: 7,225
|
Re: Synthetic Gear Oil
I really don't a difference between 250 and 140.
I use them in all 3 places. I just add to the steering box. The transmitter oil gets changed more often than the rear end just in case it happens to get some grease in it. I usually grease and adjust things once a year. |
03-09-2021, 11:57 AM | #9 | |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
|
Re: Synthetic Gear Oil
Quote:
It seemed OK in the rear end, just not the trans. I just recently drained it out of the rear end. |
|
03-09-2021, 12:06 PM | #10 |
Senior Member
Join Date: Apr 2018
Location: Mebane NC
Posts: 2,353
|
Re: Synthetic Gear Oil
Huh, interesting. I had no trouble shifting, but I don't think I've run it on a cold morning recently. What did you switch to?
|
03-09-2021, 01:04 PM | #11 | |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
|
Re: Synthetic Gear Oil
Quote:
Last edited by Y-Blockhead; 03-09-2021 at 02:50 PM. |
|
03-09-2021, 01:25 PM | #12 |
Senior Member
Join Date: Jun 2010
Posts: 638
|
Re: Synthetic Gear Oil
Ron,
First, I've tried all the different slimes & tars listed above. They are the least of your concerns. As a new Model A owner, change the engine oil and check the level on the trans & rear axle. If they are wet. drive the car. Smooth shifting is a function of two variables. First is outside temperature. Close to 30 degrees, you are not shifting into any gear for the first mile using 250W gear oil. In 1932 and 5 million Model As later, Ford recommended 140w for the trans & rear. Is your clutch pedal free play correctly adjusted ? Second variable, YOU ! The Model A with straight cut trans gears is not your ol' four speed fully syncro Camero transmission. No winding out the gears before pounding into the next. Model A owner's manual suggests shifting from 1st to 2nd at 8 mph, second to third at 15 mph. This is where you begin to find your car's shifting sweet spots with out grinding gears. Master that and then find your favorite flavor of the month gear lube. |
03-09-2021, 05:40 PM | #13 |
Senior Member
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,496
|
Re: Synthetic Gear Oil
By my experience, a light weight oil like 140 will make shifting without a crunch difficult when it is hot. Even selecting 1st gear at a stop take a lonnng time, then a crunch. It is simply not thick enough to slow the gears for a silent change. I like the idea of the extra "slipperyness" of an EP oil but not the difficulty of changing. I've tried adding thickeners to that oil without success. I is OK till things get hot, then it's back to crunchy changes. As a matter of fact, I have just drained it all out of the cog box and replaced it with my usual Transoil 250. Just over 100 miles the next day and all was back to the wonderful normal. No more experimentation for me!
__________________
I'm part of the only ever generation with an analogue childhood and a digital adulthood. |
03-09-2021, 07:49 PM | #14 |
Senior Member
Join Date: Jun 2010
Posts: 638
|
Re: Synthetic Gear Oil
Synchro,
From how you describe 'crunchy' I'm wondering about your clutch adjustment and idle speed ?? Just because factory 'new' was 1 inch free play, 80 years later a slight bit less couldn't hurt ? No air leaks & a tight throttle shaft makes for a nice low idle speed between shifts. But you knew all that .............. |
03-09-2021, 08:43 PM | #15 | |
Senior Member
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,496
|
Re: Synthetic Gear Oil
Quote:
Before I changed the oil for the second time. I checked the clutch and made it just under 1" freeplay. Idle is slow and steady.
__________________
I'm part of the only ever generation with an analogue childhood and a digital adulthood. |
|
03-09-2021, 11:38 PM | #16 | |
Senior Member
Join Date: Feb 2021
Location: Troutman, NC
Posts: 717
|
Re: Synthetic Gear Oil
Quote:
Ron |
|
03-10-2021, 11:45 AM | #17 |
Senior Member
Join Date: May 2010
Location: Long Island, NY
Posts: 3,463
|
Re: Synthetic Gear Oil
Automotive gear oils are especially formulated. Unless the oil is formulated for gears, I would not use it. Gear oil should have:
__________________
Bob Bidonde |
03-10-2021, 10:29 PM | #18 |
Senior Member
Join Date: Feb 2021
Location: Troutman, NC
Posts: 717
|
Re: Synthetic Gear Oil
So has anyone used the stuff below? Is it any good for a Model A?
LUCAS SYNTHETIC SAE 250 RACING GEAR OIL Last edited by Model A Ron; 03-10-2021 at 10:30 PM. Reason: typo |
03-11-2021, 12:36 AM | #19 |
Senior Member
Join Date: May 2016
Location: Glide, Oregon
Posts: 1,339
|
Re: Synthetic Gear Oil
FWIW it states on the container "Not Recommended for Passenger Car Use" so use at your own risk.
__________________
Ruth "Sometimes you really DO need to read the whole thread" |
03-12-2021, 01:42 AM | #20 |
Senior Member
Join Date: Feb 2021
Location: Troutman, NC
Posts: 717
|
Re: Synthetic Gear Oil
Tis may be a stupid question but is gear oil offered between 140w and 250w? Maybe a 200w would be a good option if offered.....just asking
Ron |
|
|
Sponsored Links (Register now to hide all advertisements) |
|