Speedometer cable for 1975 ford C750
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4wd Low
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Speedometer cable for 1975 ford C750
I’m trying to fix the speedometer on my 1975 Ford C750 391 4V with 5 speed Clark 280 non overdrive with two speed axle. I’m not sure of the axle make but it has a large IH cast into the axle housing. It has a two section cable that breaks in the middle where both sections thread into a gear box. I assume that gear box corrects the speedo for the two speed axle ratios. I need some help with this if anybody has any help to offer it would be greatly appreciated.
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If the cable is intact, take it apart and look at the cable inside. I think you can get that square cable by itself.
Is there an electrical connection to that gear box? I find all kinds of adapters and gearboxes associated with 2 speed axles, but I can't find one for Ford.
Sounds like your axle was a transplant. Same pattern front and rear? IH may have cast the housing but I bet the pumpkin and internals is Eaton. Everybody used Eaton 2 speeds.
Does it lock up when you drive by a corn field?
Stand by, more help may be by.
If the cable is intact, take it apart and look at the cable inside. I think you can get that square cable by itself.
Is there an electrical connection to that gear box? I find all kinds of adapters and gearboxes associated with 2 speed axles, but I can't find one for Ford.
Sounds like your axle was a transplant. Same pattern front and rear? IH may have cast the housing but I bet the pumpkin and internals is Eaton. Everybody used Eaton 2 speeds.
Does it lock up when you drive by a corn field?
Stand by, more help may be by.
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4wd Low
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The truck is all original except the trans. I’m the third owner of it, my grandpa got it off the original owner. Papaw swapped it from overdrive to straight 5 speed cause he logged for a living and it was geared too high for the loads he hauled. I’ve been through 3 or 4 cable inserts and it sheared them off about 3 or four inches from the speedometer. I think my housing has a burr in it cutting my cable inserts. The gear box works fine, and it does have a wire going too it from the high low switch. If I had a part number for that cable housing I believe I could run down one on eBay or somewhere.
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Looking up speedo cables for these trucks is a study in futility, there's a gazillion different possibilities. 
I looked at the parts catalog pic to see how the cables are routed, then looked in the text. Threw up my hands in disbelief!
I looked at the parts catalog pic to see how the cables are routed, then looked in the text. Threw up my hands in disbelief!
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Same guy in charge of bellhousing to engine patterns worked the speedo cables too?
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4wd Low
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It’s not exactly kinked, but it does have a pretty sharp bend in it right where the end for the gauge is crimped on. It has a plastic elbow on it there to protect it from getting a kink but like I said the end looks like it has be bent down pretty hard to get it to screw back onto the back of the gauge. It hasn’t worked for years, papaw probably tried to fix it years ago and give up. I’ve been through 3 or 4 cable inserts and I either cut them too short or they get sheared off at the gauge side in that bend.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
It’s not exactly kinked, but it does have a pretty sharp bend in it right where the end for the gauge is crimped on. It has a plastic elbow on it there to protect it from getting a kink but like I said the end looks like it has be bent down pretty hard to get it to screw back onto the back of the gauge. It hasn’t worked for years, papaw probably tried to fix it years ago and give up. I’ve been through 3 or 4 cable inserts and I either cut them too short or they get sheared off at the gauge side in that bend.
1974/75 C/CT600/900 // 1976 C/CT600/900 before serial number B00,001.
Additional applications: 1974/79 C/CT600/900 with Clark models 385/387 5 Speeds.
CARPENTER NOS OBSOLETE PARTS in Concord NC has 1 = 800-476-9653.
GREEN SALES CO. in Cincinnati OH has 2 = 800-543-4959.
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4wd Low
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D3HZ-17260-E .. Upper Speedometer Cable - 67" long - Use with Clark models 280/282/285/390 5 Speeds / Obsolete
1974/75 C/CT600/900 // 1976 C/CT600/900 before serial number B00,001.
Additional applications: 1974/79 C/CT600/900 with Clark models 385/387 5 Speeds.
CARPENTER NOS OBSOLETE PARTS in Concord NC has 1 = 800-476-9653.
GREEN SALES CO. in Cincinnati OH has 2 = 800-543-4959.
1974/75 C/CT600/900 // 1976 C/CT600/900 before serial number B00,001.
Additional applications: 1974/79 C/CT600/900 with Clark models 385/387 5 Speeds.
CARPENTER NOS OBSOLETE PARTS in Concord NC has 1 = 800-476-9653.
GREEN SALES CO. in Cincinnati OH has 2 = 800-543-4959.
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4wd Low
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So I have the speedometer working, now I have a new problem.!😒 The gearbox that corrects the gear ratio for the two speed axle won’t work in low. The speedometer works in high range, despite being 5 mph slow, but when you shift into low you lose the speedometer. Shift back into high and you get it back. I’m having trouble finding the part number for the speedometer gearbox. It’s not the type mounted behind the gauge, it’s on the frame between the upper and lower cable sections.
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