Notices
1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
Sponsored by:
Sponsored by: Moser

t case swap

Thread Tools
 
Search this Thread
 
Old Mar 31, 2009 | 12:16 AM
  #1  
laynejc's Avatar
laynejc
Thread Starter
|
Freshman User
Joined: Mar 2009
Posts: 35
Likes: 0
t case swap

What do I need to do to swap a 205 tcase from a 79 f250 into a 79 f150 that had a 203?
 
Reply
Old Mar 31, 2009 | 09:48 AM
  #2  
farmerdebruin's Avatar
farmerdebruin
Freshman User
Joined: Feb 2009
Posts: 32
Likes: 0
Aight, what your gonna have to do is remove your 203, cross member, driveshafts and transmission out of the F-150. The output shaft on the transmision of the F-150 will be too short. they do not make an adapter for this so you will either need a new output shaft, or you will need to use the transmision out of the F-250. Switching out put shafts will probably cost around $200 to have it done profesionaly.

Also driveshafts are gonna be a problem. I think you can switch the yokes around to make your front driveshaft work, but the rear will be hard. You will need to find one at a junk yard, or try to make one by switching out the rear yokes.
 
Reply
Old Mar 31, 2009 | 09:50 AM
  #3  
farmerdebruin's Avatar
farmerdebruin
Freshman User
Joined: Feb 2009
Posts: 32
Likes: 0
Also you will use the adapter plate from your 205, and the cross members are the same.
 
Reply
Old Mar 31, 2009 | 03:15 PM
  #4  
laynejc's Avatar
laynejc
Thread Starter
|
Freshman User
Joined: Mar 2009
Posts: 35
Likes: 0
I am using the tranny and transfer from the 250, I have the front and rear driveshafts from the 250, is the yoke you are talking about the one on the rear of the tcase or the rearend?
 
Reply
Old Apr 1, 2009 | 11:15 PM
  #5  
farmerdebruin's Avatar
farmerdebruin
Freshman User
Joined: Feb 2009
Posts: 32
Likes: 0
I believe that the yoke on the rear end of the rear drive shaft is the problem child.
 
Reply
Old Apr 1, 2009 | 11:22 PM
  #6  
laynejc's Avatar
laynejc
Thread Starter
|
Freshman User
Joined: Mar 2009
Posts: 35
Likes: 0
Originally Posted by farmerdebruin
I believe that the yoke on the rear end of the rear drive shaft is the problem child.
so what you are saying is that I need to reuse the rear part of my driveshaft?
 
Reply
Old Apr 2, 2009 | 10:26 AM
  #7  
farmerdebruin's Avatar
farmerdebruin
Freshman User
Joined: Feb 2009
Posts: 32
Likes: 0
yeah because the yoke for the 9 inch axle is a different size, but your 203 drive shaft will be to short, i do not know how to do it though, the driveshaft has to be perfectly centered or else you will wear out the bearings in your rear end and transfercase.
 
Reply
Old Apr 2, 2009 | 10:39 AM
  #8  
justforkicks's Avatar
justforkicks
Posting Guru
Joined: Mar 2009
Posts: 1,357
Likes: 1
From: Alston, MI
take the two t-cases and build a 203/205 doubler... itll have a 1:1 high range and a bunch of ranges in between, down to a 6.6:1 crawling range (i think).
 
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
Old Apr 2, 2009 | 07:43 PM
  #9  
laynejc's Avatar
laynejc
Thread Starter
|
Freshman User
Joined: Mar 2009
Posts: 35
Likes: 0
Originally Posted by justforkicks
take the two t-cases and build a 203/205 doubler... itll have a 1:1 high range and a bunch of ranges in between, down to a 6.6:1 crawling range (i think).
what does it cost to rebuild a 203?

what needs to be done in order to couple them?

what is the gear ratio as it sits?
 
Reply




All times are GMT -5. The time now is 01:49 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