5 spd swap for 240 six in my 1966 F100

57ratrod · Post by **57ratrod** » January 23, 2011, 12:12 am

i am thinking of trying to replace my 4spd with a 5 spd in my 66 f100. i am sure someone has helpful info o this swap and maybee could shed some light for me as to what junkyard parts i will need..or if i have to buy a kit? any and all help would be greatly appreciated..Donnie

Post by **Greg D** » January 23, 2011, 12:27 am

Dan (MadMaxEtc) is your guy, he did a T-5 swap on a big six.
Last I saw him post on Facebook said something about BYOB, Jello Shots and his brother's B Day - probably won't reply tonight, LOL.

Welcome to Slick 60s.

ezernut9mm · Post by **ezernut9mm** » January 23, 2011, 12:51 am

welcome to the show 57rat. 'bout time you posted. lol.
here is dan's thread (it's only 9 pages):

http://www.fordification.com/forum/view ... &sk=t&sd=a

ezernut9mm · Post by **ezernut9mm** » January 23, 2011, 12:53 am

and here are pics from his t-5 swap:

http://members.cox.net/madmaxetc/1967_F ... ics_03.htm

57ratrod · Post by **57ratrod** » January 23, 2011, 12:58 am

Rite on!! Thanks alot chris..I cant believe all the helpful info on this site.

R Pope · Post by **R Pope** » January 23, 2011, 8:53 am

An M5 from a '88-up pickup is a good swap if you can find one. They were behind 300 6's and 351's, so they bolt up.

Brian Taylor · Post by **Brian Taylor** » January 23, 2011, 9:07 am

Here is Max website with all the info and more:
http://members.cox.net/madmaxetc/

Post by **Greg D** » January 23, 2011, 10:13 am

R Pope is right - M5OD from a 80s-90s F 150 is pretty much a bolt in. They are fairly common in yards unlike the World Class T-5. It uses a hydraulic clutch that you'd need to swap but that shouldn't be too tough since larger Slicks came with them. You should replace the shifter seal on an M5OD also - they tend to go bad and then the tranny loses the fluid.
T-5 you either have to do a tailshaft swap or deal with a shifter location that is pretty close to the seat.
M5OD the shifter is pretty close to the stock location of the 4 speed you pull out.
If you are doing this for fuel mileage and driveabilty either transmission is a good choice.

MadMaxetc · Post by **MadMaxetc** » January 23, 2011, 1:10 pm

I went with the T-5 because all 5 gears are close together. Not so much a granny gear. I wanted more of a streat truck.

If you want to use your truck more like a truck and want a lower FINAL gear, the M5R2 id a good swap. I actualy couldn't find one and had a mustang friend that has a T5.

Like greg said...both are good.

Be sure to think about RPM in all gears. You don't want to have it screming at high RPM at 45 if you drive 45 a lot. etc...

I have a spreadsheet that I can calculate a lot of gearings, rpm, mph, etc...

I will post something later.

MadMaxetc · Post by **MadMaxetc** » January 23, 2011, 7:33 pm

Here is what I did for my 67.

If you give me the inputs in Orange and Yellow, I will make one for who every wants one.

I can email the excel sheet too.

Brian Taylor · Post by **Brian Taylor** » January 23, 2011, 9:00 pm

When I was looking for a 5 speed for mine I rarely found one. I went out this Saturday NOT looking for one and found 4 at one yard in F150 with the EFI 4.9 I6. They are everywhere........