Ford Model TT: differential oil??
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Topic author - Posts: 10
- Joined: Sat Nov 09, 2019 5:14 am
- First Name: Greg
- Last Name: Harless
- * REQUIRED* Type and Year of Model Ts owned: 1928 Chevy Doodlebug with a Ford TT rear
- Location: FELTON, PA
Ford Model TT: differential oil??
Hi, I recently got my dads 1928 Chevy Doodlebug running/ driving after years of sitting. After some research I’ve come to find out that the rear axle is from a Ford Model TT. This was apparently pretty common in the tractor conversions due to the gear reduction. I can’t seem to find what type of modern gear oil I should be using for the worm gear differential. I know I need to flush and replace the fluid ASAP since its probably 40 plus years old! Any help is greatly appreciated.
Thanks!
Thanks!
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- Posts: 761
- Joined: Sun Jan 06, 2019 12:07 pm
- First Name: Thomas
- Last Name: Hicks
- * REQUIRED* Type and Year of Model Ts owned: '24 TT, '26 TT, '24 Speedster, '26 Speedster
- Location: Chesterfield, VA
- MTFCA Number: 32518
Re: Ford Model TT: differential oil??
That is a topic with some varied opinions.
My T's have Ruckstells, I use this:
https://www.modeltford.com/item/90W.aspx
It is expensive, but for me it lasts forever.
For a rear with no Ruckstell a heavier oil will work:
https://www.modeltford.com/item/140W.aspx
That stuff is right high too.
I think you will find Ford used what was called 600W, but I suspect it would be labeled differently today.
And about any modern day gear oil is probably better than what was used originally.
So you will find there are lots of preferences, but no one answer.
My T's have Ruckstells, I use this:
https://www.modeltford.com/item/90W.aspx
It is expensive, but for me it lasts forever.
For a rear with no Ruckstell a heavier oil will work:
https://www.modeltford.com/item/140W.aspx
That stuff is right high too.
I think you will find Ford used what was called 600W, but I suspect it would be labeled differently today.
And about any modern day gear oil is probably better than what was used originally.
So you will find there are lots of preferences, but no one answer.
Technology, the solution to all of our problems... and the cause of most of them.
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- Posts: 761
- Joined: Sun Jan 06, 2019 12:07 pm
- First Name: Thomas
- Last Name: Hicks
- * REQUIRED* Type and Year of Model Ts owned: '24 TT, '26 TT, '24 Speedster, '26 Speedster
- Location: Chesterfield, VA
- MTFCA Number: 32518
Re: Ford Model TT: differential oil??
Some pictures would be nice.
And welcome to The Forum!
And welcome to The Forum!
Technology, the solution to all of our problems... and the cause of most of them.
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Topic author - Posts: 10
- Joined: Sat Nov 09, 2019 5:14 am
- First Name: Greg
- Last Name: Harless
- * REQUIRED* Type and Year of Model Ts owned: 1928 Chevy Doodlebug with a Ford TT rear
- Location: FELTON, PA
Re: Ford Model TT: differential oil??
Thanks for the reply. Someone told me that most oils today are better than those back then. I had read that worm gears can cause more friction so I wanted to make sure I don’t do it any harm. I tried searching the forums but couldn’t find anything but since I just joined maybe I wasn’t looking in the right place. I have a link with photos below. I ordered a TT wheel puller so I can assess the brakes and replace the seals. Found out from a Chevy forum that the gas tank is a Model T with the fill neck relocated. My understanding is the transmission is a 4 speed 1 ton Chevy. It w ould be great if anyone here could identify any other parts.
Thanks!
https://www.dropbox.com/sh/baio6k8oxc6b ... RBcHa?dl=0
Thanks!
https://www.dropbox.com/sh/baio6k8oxc6b ... RBcHa?dl=0
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- Posts: 4957
- Joined: Sat Jan 05, 2019 1:57 pm
- First Name: Mark
- Last Name: Gregush
- * REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1920 Dodge touring, 1948 F2 Ford flat head 6 pickup 3 speed
- Location: Portland Or
- MTFCA Number: 52564
- Board Member Since: 1999
Re: Ford Model TT: differential oil??
Except for the rear end and gas tank, everything else looks to be 1928 Chevrolet. Here are some links for parts suppliers etc;
https://www.fillingstation.com/
http://earlychevyparts.com/
Link to Vintage Chevrolet Club of America;
https://vccachat.org/
Specifications for the 1928 Chevrolet;
http://chevy.oldcarmanualproject.com/ch ... 8index.htm
The 600W would be correct. You can get it from Lang's, Snyder's, Mac's etc.
https://www.fillingstation.com/
http://earlychevyparts.com/
Link to Vintage Chevrolet Club of America;
https://vccachat.org/
Specifications for the 1928 Chevrolet;
http://chevy.oldcarmanualproject.com/ch ... 8index.htm
The 600W would be correct. You can get it from Lang's, Snyder's, Mac's etc.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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- Posts: 761
- Joined: Sun Jan 06, 2019 12:07 pm
- First Name: Thomas
- Last Name: Hicks
- * REQUIRED* Type and Year of Model Ts owned: '24 TT, '26 TT, '24 Speedster, '26 Speedster
- Location: Chesterfield, VA
- MTFCA Number: 32518
Re: Ford Model TT: differential oil??
From left,
Lubriplate - correct for Ruckstells
M-533 - correct 600W for T rears
Cheap 80-90W gear oil - maybe as good as original?
Some say the modern oil can deteriorate the brass in the TT rear .
Love your hybrid doodlebug!
Lubriplate - correct for Ruckstells
M-533 - correct 600W for T rears
Cheap 80-90W gear oil - maybe as good as original?
Some say the modern oil can deteriorate the brass in the TT rear .
Love your hybrid doodlebug!
Technology, the solution to all of our problems... and the cause of most of them.
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Topic author - Posts: 10
- Joined: Sat Nov 09, 2019 5:14 am
- First Name: Greg
- Last Name: Harless
- * REQUIRED* Type and Year of Model Ts owned: 1928 Chevy Doodlebug with a Ford TT rear
- Location: FELTON, PA
Re: Ford Model TT: differential oil??
Thanks for the information and taking the time to reply!
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- Posts: 992
- Joined: Sun Jan 06, 2019 3:36 pm
- First Name: Adrian
- Last Name: Whiteman
- * REQUIRED* Type and Year of Model Ts owned: 1926 TT, 1924 Colonial Roadster, 1924 'Bullnose' Morris, 1925 'Bullnose' Morris, 1936 JD AR
- Location: South Island, New Zealand
Re: Ford Model TT: differential oil??
OIL, -- you will get many opinions
Yes, most modern oils are better than those back in the day. Also we do not as high viscosity (thickness) as was needed back in the day due to technology improvements.
I run a 'non EP additive' 140 weight oil in my TT with a Ruckstell.
It is most important to use 'non EP' as the EP additive sits there quietly corroding any bronze components in the diff such as bushes and castings.
All the best and enjoy the bug! (ps, a picture would be great too when you get a chance)
Cheers,
Yes, most modern oils are better than those back in the day. Also we do not as high viscosity (thickness) as was needed back in the day due to technology improvements.
I run a 'non EP additive' 140 weight oil in my TT with a Ruckstell.
It is most important to use 'non EP' as the EP additive sits there quietly corroding any bronze components in the diff such as bushes and castings.
All the best and enjoy the bug! (ps, a picture would be great too when you get a chance)
Cheers,