Transmission ID
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Mountain Pass
Joined: May 2004
Posts: 101
Likes: 0
From: GARLAND, TX
Transmission ID
Well, I finally got me a pickup.
93 F250, XLT, x-cab, 351W, 5 speed.
Trying to identify the transmission. CODE W on the b-pillar.
Is this the 5 speed HD, or the ZF? I believe it's the HD.
93 F250, XLT, x-cab, 351W, 5 speed.
Trying to identify the transmission. CODE W on the b-pillar.
Is this the 5 speed HD, or the ZF? I believe it's the HD.
Post Fiend
Joined: Apr 2004
Posts: 6,473
Likes: 4
From: Lafayette, IN
There were two 5-speeds: the ZF and the M5OD. Since you have an F250, it's likely the ZF (the heavier-duty of the two). I'm not 100% on that, as they may have put the M5OD in the lighter-duty F250s, but if yours is the 8800 lb GVWR model, then you're definitely sitting on a ZF.
Jason
Jason
Senior User
Joined: Sep 2004
Posts: 484
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From: SC lowcountry
95 Manual lists 3 manual transmissions
Code M Mazda M5OD This is light duty Mazda- under 8500 GVW 4.9 and 5.0
Code C Mazda close ratio (Z-F) F series with 7.3 Diesel over 8500 GVW
Code W Mazda HD 5 speed OD (M5OD-HD) (ZF) All F Series over 8500 GVW except Diesel.
ZF model designation is S5-42 ZF; Stands for sychronized, 5 speed and 420 ft# of torque input.
Your answer is yes and yes.
Code M Mazda M5OD This is light duty Mazda- under 8500 GVW 4.9 and 5.0
Code C Mazda close ratio (Z-F) F series with 7.3 Diesel over 8500 GVW
Code W Mazda HD 5 speed OD (M5OD-HD) (ZF) All F Series over 8500 GVW except Diesel.
ZF model designation is S5-42 ZF; Stands for sychronized, 5 speed and 420 ft# of torque input.
Your answer is yes and yes.
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
I have never seen any literature with ZF attached to the Mazda name. I do not believe the ZF is associated with that brand.
The Mazda M5OD (also known as the M5R2) is a light duty F-150 trans. It was only in an F-250 behind the 302, which was a light duty F-250. The ZF is a heavy duty truck transmission with a low first gear ratio. The mazda does not have a low first gear ratio (aka granny gear) which makes it a poor choice for heavy work.
The Diesel simply had a ZF with different gear ratios and bell pattern. A diesel operates at different RPM which would require a transmission with different gear ratios.
The Mazda M5OD (also known as the M5R2) is a light duty F-150 trans. It was only in an F-250 behind the 302, which was a light duty F-250. The ZF is a heavy duty truck transmission with a low first gear ratio. The mazda does not have a low first gear ratio (aka granny gear) which makes it a poor choice for heavy work.
The Diesel simply had a ZF with different gear ratios and bell pattern. A diesel operates at different RPM which would require a transmission with different gear ratios.
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Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
I've seen various bits of documentation that refer to the ZF as a M5OD-HD, but you're right in that the two companies and transmissions have NOTHING to do with one another. Some genius in the marketing department came up with it, is my guess.
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Post Fiend
Joined: Apr 2004
Posts: 6,473
Likes: 4
From: Lafayette, IN
I'm guessing the 'M' stands for 'Manual', not 'Mazda', just as in the AOD, the 'A' stands for 'automatic'. Therefore, the ZF 5-speed could still be called a M5OD (Manual 5-speed w/OverDrive), but gets the 'HD' clarifier. Still easier to call it a ZF.
Jason
Jason
Senior User
Joined: Sep 2004
Posts: 484
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From: SC lowcountry
Agreed, the W code in 95 manual says "Manual - 5 speed H- D. Overdrive (M5OD-HD) (Z-F). The (Z-F) is in the same context area as (Mazda) which follows M5OD for code M in transmission listings.
Sorry - my assumption.
Possibly Z-F is symbol for manufacturer of that transmission - guess?? I notice tag for Z-F transmission has Ford logo along with ZF logo. FWIW.
Sorry - my assumption.
Possibly Z-F is symbol for manufacturer of that transmission - guess?? I notice tag for Z-F transmission has Ford logo along with ZF logo. FWIW.
