5spd installation
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Mountain Pass
Joined: Sep 2002
Posts: 129
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From: us
Well a couple months have gone by and no problems. I got a 800 to 900rpm drop in 5th gear from the other transmission, and can say fuel mileage is up 5mpg on the highway and it sure is quiet. I am not sure yet but I do believe that I have lost some top end speed, might just be my imagination as I have not had the opportunity to really open it up, it is much quicker out of the hole except that with the loss of my posi two years ago it's hard to get away without smoking the tire. Only bad thing I have to say about the swap is that I never noticed how many times I shifted before...maybe I'm just getting old. macs
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Joined: Mar 2012
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Question on swapping a 4x4 T19 with M5OD 4x4
Hello guys, I have a 85 F150 4.9L, T19 4 speed 4x4 and would like to swap in a M5OD. I scored a M5OD with a BW1356 transfer out of a 93 f150. I Also got the cross member and drive shaft from the 93 F150 as well.
From what I can see, the transfer case shifter is offset instead of right behind the trans shifter like the T19. And the BW 1356 doesn't have the gear driven speedo.
Has anyone else attemped this? I'm wondering if the bw1356 shifter can be modified or if I cab floor needs to be modified. And if there is a solution for the speedo, thanks.
bpbleedsblue
From what I can see, the transfer case shifter is offset instead of right behind the trans shifter like the T19. And the BW 1356 doesn't have the gear driven speedo.
Has anyone else attemped this? I'm wondering if the bw1356 shifter can be modified or if I cab floor needs to be modified. And if there is a solution for the speedo, thanks.
bpbleedsblue
Posting Guru
Joined: Jun 2012
Posts: 1,061
Likes: 9
From: Mims, FL
Madmacs, glad to see all went well. The Mazda 5 sp was put behind the 4.9L for many yrs, so it's a good, easy, and available swap.
I also have a '81 F100, but am going to a T5 mainly because I have one. Anything will be better than the anemic SROD 3 sp + OD trans.
I also have a '81 F100, but am going to a T5 mainly because I have one. Anything will be better than the anemic SROD 3 sp + OD trans.
New User
Joined: Mar 2012
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But I suppose it might be worth it. Thanks for the tip.
Moderator
Joined: Jan 2001
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From: Virginia
Look the later transfer case over very carefully, it might have a spot for the speedo but it's blanked off. But from your other problems, it would probably be easier to get another older type like you have already that is not cracked.
Fleet Mechanic
Joined: Jun 2015
Posts: 1,877
Likes: 295
From: Central Michigan
Well a couple months have gone by and no problems. I got a 800 to 900rpm drop in 5th gear from the other transmission, and can say fuel mileage is up 5mpg on the highway and it sure is quiet. I am not sure yet but I do believe that I have lost some top end speed, might just be my imagination as I have not had the opportunity to really open it up, it is much quicker out of the hole except that with the loss of my posi two years ago it's hard to get away without smoking the tire. Only bad thing I have to say about the swap is that I never noticed how many times I shifted before...maybe I'm just getting old. macs
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Joined: Nov 2015
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From: Angier, NC
I have not done this but what you want to do with the output shaft is doable but (edit) not (/edit) with at home tools.
The output shaft is harden so you will not be able to drill it.
Don't know what you are doing for gauges but Gauges, Custom Gauges, Tachometers, Speedometers, Shift Light, Pod has GPS speedos so no cable. I have one in a car I am building but have not driven it yet but when out of the garage it does pick up a satellite.
Dave ----
The output shaft is harden so you will not be able to drill it.
Don't know what you are doing for gauges but Gauges, Custom Gauges, Tachometers, Speedometers, Shift Light, Pod has GPS speedos so no cable. I have one in a car I am building but have not driven it yet but when out of the garage it does pick up a satellite.
Dave ----
Fleet Mechanic
Joined: Jun 2015
Posts: 1,877
Likes: 295
From: Central Michigan
I have not done this but what you want to do with the output shaft is doable but with at home tools.
The output shaft is harden so you will not be able to drill it.
Don't know what you are doing for gauges but Gauges, Custom Gauges, Tachometers, Speedometers, Shift Light, Pod has GPS speedos so no cable. I have one in a car I am building but have not driven it yet but when out of the garage it does pick up a satellite.
Dave ----
The output shaft is harden so you will not be able to drill it.
Don't know what you are doing for gauges but Gauges, Custom Gauges, Tachometers, Speedometers, Shift Light, Pod has GPS speedos so no cable. I have one in a car I am building but have not driven it yet but when out of the garage it does pick up a satellite.
Dave ----
Posting Guru
Joined: Jun 2012
Posts: 1,061
Likes: 9
From: Mims, FL
<snip> I got a tail housing w/ speedo hole and I got a drive gear(7 tooth) which I believe is correct. I am planning to drill the output shaft for the retaining ball and use a cutter wheel to make the groove for the retainer snap ring. Does this all sound workable to you? I also need a driven gear (I think a 20 tooth). do you have any advice where I can get the correct one?? Also were you able to put the driven gear directly on your cable that was in the 4 speed or did you have to use a Vehicle Speed Sensor as a connector between the gear and the cable?? Thanks so much for your help. Greg
Speedometer Gears - ???Gary's Garagemahal
Specifically, the drive gear page (M5R2 listed at bottom under 1988 yr):
Speedometer Drive Gears - ???Gary's Garagemahal
And driven (these are listed by r/e ratio, and don't see M5R2 listed, but maybe someone here can elaborate):
Speedometer Driven Gears - ???Gary's Garagemahal
Drive/driven gears are dependent on your rear end ratio. I've been going through this since changing mine from 2.47 to 3.50. I am at the highest driven gear I can find (21T) and it's still 10% high. I need to either get into the tail shaft and change the drive gear, get a ratio adapter (easier and prob what I'll do), or live with it (what I'm doing now).
If I was in your situation, with access to the tailshaft, would doublecheck what the stock application was with that transmission and your rear end ratio. The goal should be to put a drive gear that will put the range in the middle of the range if possible so you have some adjustment up or down if you need it.
On my SROD speedo cable, the driven gear does insert on the end with a special C clip, but yours may be different.
Fleet Mechanic
Joined: Jul 2003
Posts: 1,844
Likes: 129
From: Atlantic Canada
Hi Guys,
I know this is an old thread, but I'm looking to confirm a couple things.
My truck is a 1984 302 w/3spd manual, and I want to swap in a 5spd.
I have found an M5OD locally that is supposed to have come out of a 1991 F250 2wd pickup with a 302.
In reading earlier in this thread, I see that the trans cross member will have to be moved, and I'm OK with that. I'm also ok with mods to make the hydraulic clutch work.
Will my existing cable speedo work with this trans? (assuming I could change the speedo gears to correct mph if required?)
Can I re-use my existing output shaft and drive shaft, or will they need to be changed also?
Anything else I need to know or be aware of?
I know this is an old thread, but I'm looking to confirm a couple things.
My truck is a 1984 302 w/3spd manual, and I want to swap in a 5spd.
I have found an M5OD locally that is supposed to have come out of a 1991 F250 2wd pickup with a 302.
In reading earlier in this thread, I see that the trans cross member will have to be moved, and I'm OK with that. I'm also ok with mods to make the hydraulic clutch work.
Will my existing cable speedo work with this trans? (assuming I could change the speedo gears to correct mph if required?)
Can I re-use my existing output shaft and drive shaft, or will they need to be changed also?
Anything else I need to know or be aware of?
Fleet Mechanic
Joined: Jun 2015
Posts: 1,877
Likes: 295
From: Central Michigan
Hey Rembrandt, check out my basket case build thread and you'll see what I did. The truck still isn't running yet so the jury is still out as if it will work... we'll see. Actually if your trans is out of a 91 you may be all set- if 92 up there is no provision for speedo cable.
Fleet Mechanic
Joined: Jul 2003
Posts: 1,844
Likes: 129
From: Atlantic Canada
Hey Rembrandt, check out my basket case build thread and you'll see what I did. The truck still isn't running yet so the jury is still out as if it will work... we'll see. Actually if your trans is out of a 91 you may be all set- if 92 up there is no provision for speedo cable.
I just took a read through your thread. Great stuff. I guess if I have to fab a cross member, that's not the end of the world.