Speedometer not working
Thread Starter
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Cross-Country
Joined: Jan 2023
Posts: 94
Likes: 3
Are you sure the cable is pushed on the cluster all the?
It has a L shape clip that holds it to the outer shaft on the cluster and it may not be on all the way.
The other thing is to make sure the inner cable is turning when you are moving.
Might need to pull the cable down to a point you can see the end and take it for a spin.
If it spins at the cluster end then it has to be the speedo gauge in my book.
Dave ----
It has a L shape clip that holds it to the outer shaft on the cluster and it may not be on all the way.
The other thing is to make sure the inner cable is turning when you are moving.
Might need to pull the cable down to a point you can see the end and take it for a spin.
If it spins at the cluster end then it has to be the speedo gauge in my book.
Dave ----
FTE Legend
Joined: Nov 2015
Posts: 30,856
Likes: 4,106
From: Angier, NC
I dont know how the drive gear is "bolted" to the out put shaft and held in place.
On the 4x2 trans (T18 & NP435) the gear has a slot as dose the shaft a ball bearing fits in that keeps the gear from spinning on the shaft.
The shaft is stepped so it cant go forward on the shaft and has a snap ring to keep it from moving back off the shaft.
I know on the 2 above transmissions you remove the tail housing to get to the gear.
Mine have slip yoke on the transmission so it was easy to remove.
Maybe you can find a break down of your transfer case to see how the gear is set up.
If you put finger in the speedo hole can you spin the drive gear on the shaft?
Dave ----
FTE Legend
Joined: Nov 2015
Posts: 30,856
Likes: 4,106
From: Angier, NC
I found both the drive & driven gears were bad on the T18 trans I first started with then found the drive gear on the NP435.
I was able to look inside the hole but also felt the drive gear in the center was lower then the outer edges.
Dave ----
I was able to look inside the hole but also felt the drive gear in the center was lower then the outer edges.
Dave ----
Thread Starter
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Cross-Country
Joined: Jan 2023
Posts: 94
Likes: 3
If you can put a drill on the inner cable at the transfer case and the gauge works then it has to be in the case.
I dont know how the drive gear is "bolted" to the out put shaft and held in place.
On the 4x2 trans (T18 & NP435) the gear has a slot as dose the shaft a ball bearing fits in that keeps the gear from spinning on the shaft.
The shaft is stepped so it cant go forward on the shaft and has a snap ring to keep it from moving back off the shaft.
I know on the 2 above transmissions you remove the tail housing to get to the gear.
Mine have slip yoke on the transmission so it was easy to remove.
Maybe you can find a break down of your transfer case to see how the gear is set up.
If you put finger in the speedo hole can you spin the drive gear on the shaft?
Dave ----
I dont know how the drive gear is "bolted" to the out put shaft and held in place.
On the 4x2 trans (T18 & NP435) the gear has a slot as dose the shaft a ball bearing fits in that keeps the gear from spinning on the shaft.
The shaft is stepped so it cant go forward on the shaft and has a snap ring to keep it from moving back off the shaft.
I know on the 2 above transmissions you remove the tail housing to get to the gear.
Mine have slip yoke on the transmission so it was easy to remove.
Maybe you can find a break down of your transfer case to see how the gear is set up.
If you put finger in the speedo hole can you spin the drive gear on the shaft?
Dave ----
Thread Starter
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Cross-Country
Joined: Jan 2023
Posts: 94
Likes: 3
How would I know if I maybe have the wrong gear on either the drive side or the driven side? I have the granny gear 4spd, not sure what the actual model is for that one but it's 4wd, single cab with an 8 foot box.
FTE Legend
Joined: Nov 2015
Posts: 30,856
Likes: 4,106
From: Angier, NC
Think that is why it was said to put grease on the gear and put it in and pull ir back out so you could see if the gears were meashing or not.
Dave ----
Dave ----
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Cross-Country
Joined: Jan 2023
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I haven't gotten a chance to take the back of the Transfer case off yet because I've been iut of town on work. Will I need to take off the U-joints on the driveshaft to get the back of the transfer case off? Is there anything else i should be aware of that could bite me later on?
Trailering
Joined: Jun 2011
Posts: 20
Likes: 0
From: San Antonio, TX
I was wondering what the resolution was here. I've been having similar issues with mine. 1985 F-250, but 2WD with the T-19 4spd. The cable is new and intact. When free on either end it spins freely. The speedometer spins freely when disconnected (just grabbing the little brass stem coming out the back and spinning it) and actuates the needle and odometer. It seems to be pushed all the way in to the back of the speedo, but when I do that and try to spin the driven gear by hand it is obviously getting bound up, clicking at the driven gear, and doesn't actuate anything on the speedo. Internal drive gear looks and feels just fine.
FYI, when I replaced the broken cable a few months ago, it worked fine for about 6 weeks, maybe 200 miles, then when driving one day at about 45mph it started bouncing really hard for about 5 seconds and then it just dropped to 0. This made me think the cable had to have broken again, but like I said it's fine.
Any thoughts?
FYI, when I replaced the broken cable a few months ago, it worked fine for about 6 weeks, maybe 200 miles, then when driving one day at about 45mph it started bouncing really hard for about 5 seconds and then it just dropped to 0. This made me think the cable had to have broken again, but like I said it's fine.
Any thoughts?
Thread Starter
|
Cross-Country
Joined: Jan 2023
Posts: 94
Likes: 3
I was wondering what the resolution was here. I've been having similar issues with mine. 1985 F-250, but 2WD with the T-19 4spd. The cable is new and intact. When free on either end it spins freely. The speedometer spins freely when disconnected (just grabbing the little brass stem coming out the back and spinning it) and actuates the needle and odometer. It seems to be pushed all the way in to the back of the speedo, but when I do that and try to spin the driven gear by hand it is obviously getting bound up, clicking at the driven gear, and doesn't actuate anything on the speedo. Internal drive gear looks and feels just fine.
FYI, when I replaced the broken cable a few months ago, it worked fine for about 6 weeks, maybe 200 miles, then when driving one day at about 45mph it started bouncing really hard for about 5 seconds and then it just dropped to 0. This made me think the cable had to have broken again, but like I said it's fine.
Any thoughts?
FYI, when I replaced the broken cable a few months ago, it worked fine for about 6 weeks, maybe 200 miles, then when driving one day at about 45mph it started bouncing really hard for about 5 seconds and then it just dropped to 0. This made me think the cable had to have broken again, but like I said it's fine.
Any thoughts?
Trailering
Joined: Jun 2011
Posts: 20
Likes: 0
From: San Antonio, TX
Curious if there's a different way to test the speedo? When I pulled it out and disconnected the cable, I could spin the shaft by grabbing the outside of it, and that would move the needle, and even advanced the odometer. Is it possible the internal of the shaft is stripped?
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