Notices
1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

Fluid Questions

Thread Tools
 
Search this Thread
 
Old Jul 14, 2011 | 03:27 PM
  #1  
1andonlywhitie's Avatar
1andonlywhitie
Thread Starter
|
Senior User
Joined: May 2011
Posts: 115
Likes: 0
From: Allen, Texas
Fluid Questions

Alright guys, need some advice on what fluids to run in:

1: The original straight-cut 4 speed.

2: The rear diff.

I'm doing a fluid change, already done engine oil, new brakes, about to do radiator flush and then I'll jump onto the trans and rear diff.

Thanks guys!
 
Reply
Old Jul 14, 2011 | 03:48 PM
  #2  
Doc's Avatar
Doc
Logistics Pro
15 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2010
Posts: 4,961
Likes: 260
From: East KY
Club FTE Gold Member
I used 90 weight gear oil. I'm sure somebody will jump on here and give you better advice, but I'm pretty sure the shop manual mentions 90 weight oil.
 
Reply
Old Jul 14, 2011 | 06:02 PM
  #3  
1andonlywhitie's Avatar
1andonlywhitie
Thread Starter
|
Senior User
Joined: May 2011
Posts: 115
Likes: 0
From: Allen, Texas
Originally Posted by Mountaindoc
I used 90 weight gear oil. I'm sure somebody will jump on here and give you better advice, but I'm pretty sure the shop manual mentions 90 weight oil.
Alright, sounds good. Any idea how much I need of each? I don't have a manual or anything so it's all coming from online but it's hard to research.
 
Reply
Old Jul 14, 2011 | 06:35 PM
  #4  
teardropty's Avatar
teardropty
Posting Guru
Joined: May 2010
Posts: 1,057
Likes: 2
From: Kalamazoo MI
I use 90w with a little bit of Lucas oil stabilizer mixed in. The lucas bonds to the innards and protects the metal. That's my .02. I put the rest of the lucas in the motor.
 
Reply
Old Jul 14, 2011 | 07:31 PM
  #5  
ibuzzard's Avatar
ibuzzard
See A Man About A Horse
Joined: Apr 2003
Posts: 4,899
Likes: 656
From: Mariposa, Ca.
Club FTE Gold Member
If you get yourself a gallon of 80-90 W that comes with the pump,to start, you can go grab another couple quarts if you need more.

Steve
 
Reply
Old Jul 14, 2011 | 10:05 PM
  #6  
F250racer's Avatar
F250racer
Elder User
Joined: Jun 2008
Posts: 694
Likes: 8
From: Vashon, WA
I run 80-90w as well with no problems.
 
Reply
Old Jul 14, 2011 | 10:16 PM
  #7  
arrowheadfred's Avatar
arrowheadfred
Posting Guru
Joined: Mar 2010
Posts: 1,781
Likes: 6
From: WEWAHITCHKA FL.
SENTATIC 90 i KNOW I SPELLED THAT WRONG. Dum redneck. LOL LOL bUT i guess yall can smell what i'm stepping in.
 
Reply
Old Jul 14, 2011 | 10:33 PM
  #8  
Moe Craig's Avatar
Moe Craig
Cargo Master
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Sep 2010
Posts: 3,426
Likes: 48
From: Hot AZ (Phoenix Valley)
Club FTE Silver Member

I checked my Ford Service Manual for 49-50 Cars and Trucks May 1, 1951
  1. Page 11 Transmission "S.A.E. 140 in summer and S.A.E. 90 winter. Trucks with remote control shift mechanism, use S.A.E. 90 in summer and S.A.E. 80 in winter."
  2. Page 10 Rear End "F1 useS.A.E. 90"
Hope this helps.
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski




All times are GMT -5. The time now is 05:26 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE