Flathead + 4 speed tranny suggestions
Thread Starter
|
Laughing Gas
Joined: Jan 2007
Posts: 765
Likes: 4
From: Fairmount, Georgia
Flathead + 4 speed tranny suggestions
Got a 48 F1. Want to use a Flatty with a four speed trans. Does anybody have any suggestions? I have seen a thread recently talking about a Warner T something being a direct bolt on to a Flatty. Any help is greatly appreciated.
Senior User
Joined: Dec 2006
Posts: 378
Likes: 0
From: Hudson, OH
4 spd Flatty
Hotshot
Joined: Jan 2001
Posts: 16,882
Likes: 3,126
From: SE Wisc. (the Rust Belt)
You can mount a T-5 behind a flattie either by buying a kit from a place like Speedway Motors or you could make your own using the "Hogshead" from a F-2 and up Ford truck. There has been a lot of discussion about this conversion on this site. Since you are a new member you won't be able to use the search feature of the site so do a Google search using terms like "transmission" "adapter" or "T-5" and then insert this sites url in the domain box on the search page. You should find a lot of leads.
You can also use the transmission from a '85 and up Ford F-150.
You can also use the transmission from a '85 and up Ford F-150.
Logistics Pro
Joined: Jan 2001
Posts: 3,789
Likes: 26
From: Connecticut
Yep, 4-sp. 4th is 1-to-1.
Rear mount holes even lined up to the original crashbox crossmember holes.
Clutch lever, and e-brake lined up too!
Talk about a perfect bolt on fit!
Got the T-98 from Chuck at Chucks Trucks, (203 288 2769)
He may still have another one on the shelf!
And I also bagged a Browney box on ebay for Overdrive!
With the Eaton 2-sp rear sporting 5:83 in high, Solid rims and 9R-22.5 radials and a Browney box, 65 may be No problem for this 1948 F-5.
This will probably be the first time ever this thing will go over 40 MPH!
Cool or what????
Rear mount holes even lined up to the original crashbox crossmember holes.
Clutch lever, and e-brake lined up too!
Talk about a perfect bolt on fit!
Got the T-98 from Chuck at Chucks Trucks, (203 288 2769)
He may still have another one on the shelf!
And I also bagged a Browney box on ebay for Overdrive!
With the Eaton 2-sp rear sporting 5:83 in high, Solid rims and 9R-22.5 radials and a Browney box, 65 may be No problem for this 1948 F-5.
This will probably be the first time ever this thing will go over 40 MPH!
Cool or what????
Thread Starter
|
Laughing Gas
Joined: Jan 2007
Posts: 765
Likes: 4
From: Fairmount, Georgia
Thanks everybody for the info. I just have one more question, and at the risk of sounding dumb, what is a "crashbox"?
Trending Topics
Cargo Master
Joined: Jan 2004
Posts: 2,196
Likes: 351
From: Mandan, ND
Originally Posted by thendrix
Thanks everybody for the info. I just have one more question, and at the risk of sounding dumb, what is a "crashbox"?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Posting Guru
Joined: Apr 2004
Posts: 1,908
Likes: 2
From: Seattle WA.
I drove my 51F1 for a year with that lousy Crashbox and 4.27 gears in it. Then I installed an 89 S-10 5 speed and 9" rearend with 3.23 gears. That trans is great it made that truck a pleasure to drive again. Look in my pictures I put some pictures of the install there
Posting Guru
Joined: Apr 2004
Posts: 1,908
Likes: 2
From: Seattle WA.
Originally Posted by reamer
Crashbox = double shifting, = lots of gear grinding
Hotshot
Joined: Jan 2001
Posts: 16,882
Likes: 3,126
From: SE Wisc. (the Rust Belt)
I concider the non-syncro 4 speed as a anti-theft device. I love watching someone who has never driven one try to drive it. I personally don't mind the tranny. I don't even double clutch it anymore, except around corners. I just listen to the engine and shift.
Posting Guru
Joined: Mar 2002
Posts: 2,070
Likes: 2
From: Boise, Idaho
Originally Posted by thendrix
Got a 48 F1. Want to use a Flatty with a four speed trans. Does anybody have any suggestions? I have seen a thread recently talking about a Warner T something being a direct bolt on to a Flatty. Any help is greatly appreciated.
There is a bellhousing that fits light-duty 3sp transmissions. The trans bolt pattern is sometimes called 'narrow'. And there are top-loader and T-10 four speed transmissions that have this narrow bolt pattern. Be aware of input shaft length differences; truck transmissions tend to have longer input shafts.
Many top-loaders have a 1-1 fourth gear. Later top-loaders and the SROD have an overdriven fourth gear and third gear is 1-1.
There are top-loaders that came in Jeeps, T-176 for example, that have a shifter that bolts to the top of the transmission. This is a nice option because the shifter will clear the seat. A problem with the T-5 conversion is getting a tailshaft/shifter setup that clears the seat. The Mustang World Class T-5 has its shifter back on the tailhousing and doesn't fit well. The S-10 T-5 transmission has its shifter farther forward and fits better, but it isn't as strong as the Mustang WC T-5.
Short answer; what you're asking about it the top-loader 4 speed transmission.
Cargo Master
Joined: Jan 2004
Posts: 2,196
Likes: 351
From: Mandan, ND
Originally Posted by 1952henry
a non -synchro-ed transmission. T98s were found in Ford trucks clear up 'til the early 60s. I here tell that the input shaft splines were the same from Y-blocks to flatheads, at least on the three speeds.
