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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Which transmission is this?

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Old Nov 13, 2021 | 07:59 AM
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Which transmission is this?

I’m toying with the 5 speed transmission swap for my 1981 f150 with a 300 six cylinder.

this transmission popped up close by.
supposed to be out of a ‘96 f150 with a 300.

I’m not sure how much I should believe the seller because he says it is a C4 transmission.

here are the pictures he sent me.

Front view

Side view

Information tag
 
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Old Nov 13, 2021 | 08:44 AM
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The C4 was a 3sp automatic trans built in the '60's. it's definitely not that. With the integrated belhousing and allegedly being from a '96 F series that would be the Mazda M5OD which is exactly what you want. But that trans was also used in the Ranger so you would want to check the belhousing bolt pattern.
 
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Old Nov 13, 2021 | 09:23 AM
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Originally Posted by Conanski
. But that trans was also used in the Ranger so you would want to check the belhousing bolt pattern.

Thanks for the information.
Was the Mazda M5od offered with different internal gear combinations or are all Mazda transmissions that came from a 6 cylinder Ford the same?
 
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Old Nov 13, 2021 | 08:29 PM
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This link says all the R2 versions were the same. The R1 versions are for the small ranger pickups.

Mazda M5OD-R2 (M5R2) Transmission Specs & Ratios
 
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Old Nov 14, 2021 | 08:16 AM
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Thanks for the info from everyone.

I wandered around and found this F2TA unit has a “electronic speed sensor” which I think is the speedometer drive or sending unit. I have a mechanical speedometer so this one wouldn’t work for me.

My search and learning curve will continue.
 
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Old Nov 14, 2021 | 08:57 AM
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I believe the speedo drive modules are interchangable... just remove the electronic version and install the mechanical.
 
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Old Nov 15, 2021 | 05:54 PM
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Originally Posted by Conanski
I believe the speedo drive modules are interchangable... just remove the electronic version and install the mechanical.
The transmission he posted a picture of I dont see where he could " just remove the electronic version and install the mechanical" do you?
On that transmission I think it takes its reading off a "tone ring" inside the rear axle sent to the computer and it uses it for speed & ABS.

There are a few of that transmission that dose use a mechanical speedo. I just dont remember what years use it.
Dave ----
 
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Old Nov 15, 2021 | 06:10 PM
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That transmission is the m5od.
different years used the old speedometer cable, then changed to the tone ring in the rearend. All of them i know of had the hole machined into the tail shaft housing. You can see it in the OP picture. They installed a metal plug in the hole that can be removed. The main problem is there is not usually a speedomtere drive gear installed. That gear is reputed to be NLA. But i did find one online from a transmission/gear shop. I don't remember the shops name but it took alot of searching. And a few wrong gears.
 
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Old Nov 16, 2021 | 08:08 AM
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Originally Posted by R&S20
The main problem is there is not usually a speedomtere drive gear installed.
Yep, that was my thought. These transmissions are popular enough that I should be able to find the correct one.

This one caught my eye because it is close by and not 3 states away.

Thanks for sharing your knowledge.
 

Last edited by ctubutis; Nov 16, 2021 at 08:06 PM. Reason: Fix quote
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Old Nov 16, 2021 | 05:38 PM
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If the transmission is good and the price is right i would get it if possible. Alot of them died a early death from lack of fluid,So you maybe able to find a bad one to get the parts you need.
if not already done upgrade the seals on the end of the shift rails
 
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Old Nov 17, 2021 | 02:37 PM
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Thanks for the suggestion of getting it but I think I’ll just wait for the mechanical drive speedometer to come by.
 
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