The Ford Barn

CatMan1 · 11-19-2021, 10:12 AM

I don't want to beat a dead horse over this as I've brought this up before a few times.....A question just occurred to me, though. Does heavy transmission oil in the winter time cause the gears to slow down quicker or faster in between shifts? I thought it would slow them down quicker. I put in 600W from Snyders and it's cold in Iowa now. Up-Shifting has become difficult and unpredictable. Down-Shifting is fine.

Ruth · 11-19-2021, 10:42 AM

Yes, heavy oil wil slow the gears quicker. You would probably do good using a multi-grade. I use Lucas 85w-140 with good results.

JD 1931 · 11-19-2021, 11:53 AM

mix half 85wx140w with half STP, done this for years and use it in diff. and trans...shifts without grinding

CatMan1 · 11-19-2021, 11:58 AM

That's 2 votes for the 85W-140. I've been thinking about changing that out. With that do you up-shift fast or slow? Double-Clutch?

nkaminar · 11-19-2021, 04:23 PM

Three votes for 85W-140. Ford recommended 10% kerosene in the transmission oil for cold weather. You can go that route but then you have to change back in warmer weather. Plus the modern transmission oil is better for the transmission. The transmission and rear end will last longer. The modern oils have additives that maintain the oil film.

CatMan1 · 11-19-2021, 05:42 PM

Sponsored Links (Register now to hide all advertisements)

I've read that before about the kerosene. Has anyone tried it in the last.....50....60 years? My math is lousy....how much would 10% be? No, I'm not actually going to try it.

nkaminar · 11-19-2021, 06:46 PM

10% is one part in 10. So 10 ounces of oil would have 1 ounce of kerosene added to it. 20 ounces of oil would have 2 ounces of kerosene added to it. I think the transmission holds one pint, which is 16 ounces. So you would add 1.6 ounces of kerosene to the transmission for cold weather. A little less than 1/4 cup. I don't think the 10% is very critical so anywhere near that amount would probably work.

11-19-2021, 10:12 AM	#1
CatMan1 Senior Member Join Date: Jun 2021 Location: Pella, IA Posts: 337	Heavy Oil & Shifting I don't want to beat a dead horse over this as I've brought this up before a few times.....A question just occurred to me, though. Does heavy transmission oil in the winter time cause the gears to slow down quicker or faster in between shifts? I thought it would slow them down quicker. I put in 600W from Snyders and it's cold in Iowa now. Up-Shifting has become difficult and unpredictable. Down-Shifting is fine.

11-19-2021, 10:42 AM	#2
Ruth Senior Member Join Date: May 2016 Location: Glide, Oregon Posts: 1,339	Re: Heavy Oil & Shifting Yes, heavy oil wil slow the gears quicker. You would probably do good using a multi-grade. I use Lucas 85w-140 with good results. __________________ Ruth "Sometimes you really DO need to read the whole thread"

11-19-2021, 11:53 AM	#3
JD 1931 Senior Member Join Date: Jul 2010 Location: west coast Fla.. Posts: 311	Re: Heavy Oil & Shifting mix half 85wx140w with half STP, done this for years and use it in diff. and trans...shifts without grinding Last edited by JD 1931; 11-19-2021 at 11:54 AM. Reason: spell

11-19-2021, 11:58 AM	#4
CatMan1 Senior Member Join Date: Jun 2021 Location: Pella, IA Posts: 337	Re: Heavy Oil & Shifting That's 2 votes for the 85W-140. I've been thinking about changing that out. With that do you up-shift fast or slow? Double-Clutch?

11-19-2021, 04:23 PM	#5
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,897	Re: Heavy Oil & Shifting Three votes for 85W-140. Ford recommended 10% kerosene in the transmission oil for cold weather. You can go that route but then you have to change back in warmer weather. Plus the modern transmission oil is better for the transmission. The transmission and rear end will last longer. The modern oils have additives that maintain the oil film. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

11-19-2021, 05:42 PM	#6
CatMan1 Senior Member Join Date: Jun 2021 Location: Pella, IA Posts: 337	Re: Heavy Oil & Shifting Sponsored Links (Register now to hide all advertisements) I've read that before about the kerosene. Has anyone tried it in the last.....50....60 years? My math is lousy....how much would 10% be? No, I'm not actually going to try it.

11-19-2021, 06:46 PM	#7
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,897	Re: Heavy Oil & Shifting 10% is one part in 10. So 10 ounces of oil would have 1 ounce of kerosene added to it. 20 ounces of oil would have 2 ounces of kerosene added to it. I think the transmission holds one pint, which is 16 ounces. So you would add 1.6 ounces of kerosene to the transmission for cold weather. A little less than 1/4 cup. I don't think the 10% is very critical so anywhere near that amount would probably work. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. Last edited by nkaminar; 11-19-2021 at 06:51 PM.