SO MY SPEEDOMETER STARTED 'KICKING' THEN FROZE AT 20 MPH MARK. I TOOK IT APART AND LUBRICATED THE CABLE BUT NO RELIEF CAN YOU GUYS SUGGESTLIKELY SOURCE OF PROBLEM AND HOW RO TROUBOE SHOOT IT?
THANKS
JOE
Original Post
Replies sorted oldest to newest
Recently my speedo needle was bouncing so I removed the cable and lube’d it behind the speedo and it still bounced. I then removed the other end from the speedo drive at the ZF and poured oil into the speedo drive and cable and that fixed my issue. Do not remove the speedo drive mechanism just the cable as there is a part that will come apart in the ZF trans from what I have heard.
@lousbby posted:Recently my speedo needle was bouncing so I removed the cable and lube’d it behind the speedo and it still bounced. I then removed the other end from the speedo drive at the ZF and poured oil into the speedo drive and cable and that fixed my issue. Do not remove the speedo drive mechanism just the cable as there is a part that will come apart in the ZF trans from what I have heard.
Well, i did not know that anything would come apart… I took the angle drive off when I replaced my speedo cable as well…(did not try to take the drive apart) nothing happened to my knowledge..
then I spent quite some time with gasoline to flush the old crap out and then induced new oil in it… it feels very good now compared to before….
Isn’t there a bolt that goes through the case that retains the drive element in the ZF case in place?
I think you’re OK removing the angle drive, as long as you keep that retainer bolt in place…
(Someone speak up if I’m incorrect on this…)
Wade and I did drop the drive element into the case accidentally, but we’re luckily able to fish it back out with a magnet through it’s hole…. without having to open the case back up. BUT…. My ZF was on Wade’s workbench, not in the car.
MIGHT be good to check the angle drive. Can you move the wheels now? Put it in 5th, push in the clutch, rotate the back wheels, and see if the angle drive moves…
(But it’s funny that the needle is stuck at 20 MPH)…
Rocky
PS. You can download the ZF manual from the POCA Website to confirm this (if you’re a member). You may be able to still find the manual on the internet…. It’s the same transaxle used on the Maserati Bora (and the Fendt Roller, what ever that is!)
The grand grandfather & grandfather of our trans…(DKW leader in German front wheel drive of the period , Hanomag, Mercedes had their hands in it)
Exchange rate is 0.0011 call it $1600
looks familiar…??
frontwheel drive…. Engine sat behind the transmission..
Attachments
Images (4)
Just in case anybody gets any idea… Those were 4 speed and the engine had around 80 hp….. diff ratio 5.28
Attachments
Images (1)
I was just about to pull the trigger, then you talked me out of it!
@rocky posted:I was just about to pull the trigger, then you talked me out of it!
You’re better off to get the Beverly Hills car club automatic transmission with split Bluetooth driveshafts. They never break‼️
@slojoe posted:SO MY SPEEDOMETER STARTED 'KICKING' THEN FROZE AT 20 MPH MARK. I TOOK IT APART AND LUBRICATED THE CABLE BUT NO RELIEF CAN YOU GUYS SUGGESTLIKELY SOURCE OF PROBLEM AND HOW RO TROUBOE SHOOT IT?
THANKS
JOE
When you say stuck at 20 miles an hour… Do you mean the needle is permanently at 20 miles an hour no matter if you move or not it’s just kicking up to 20 miles an hour not higher?
NO IT STUCK AT 20 MPH UNTIL I TOOK CABLE OUT THEN BACK TO 0
The way a speedometer typically works is the speedo cable whirls a bar with a magnet on it, and the magnetic force is sensed by a bar connected th the speedometer needle.
The magnet and the sensing bar are not supposed to touch.
Given that your needle stuck at 20 mph, that might lead me to suspect something in the speedometer body.
You might be able to spin the cable at the angle adapter with a drill, and have someone watch the speedo for you…. But this won’t tell you if it’s in the cable or the instrument body.
You might need to pull the speedo out of the dash to isolate the problem…
Rocky
GONNA PULL SPEEDO AND SEE IF CABLE SPINS
On Wednesday, July 24, 2024 at 03:06:04 PM PDT, The De Tomaso Forums <alerts@crowdstack.com> wrote:
| == To reply by email, write above this line. == |
|
New Reply By rocky
|
| SPEEDOMETER NOT METERINGReply by rocky
The way a speedometer typically works is the speedo cable whirls a bar with a magnet on it, and the magnetic force is sensed by a bar connected th the speedometer needle.
The magnet and the sensing bar are not supposed to touch.
Given that your needle stuck at 20 mph, that might lead me to suspect something in the speedometer body.
You might be able to spin the cable at the angle adapter with a drill, and have someone watch the speedo for you…. But this won’t tell you if it’s in the cable or the instrument body.
You might need to pull the speedo out of the dash to isolate the problem…
Rocky
[ View Reply ]
|
| The De Tomaso Forums
You received this based on your notification settings. You can adjust your settings or unsubscribe anytime.
|
On Wednesday, July 24, 2024 at 03:06:04 PM PDT, The De Tomaso Forums <alerts@crowdstack.com> wrote:
| == To reply by email, write above this line. == |
|
New Reply By rocky
|
| SPEEDOMETER NOT METERINGReply by rocky
The way a speedometer typically works is the speedo cable whirls a bar with a magnet on it, and the magnetic force is sensed by a bar connected th the speedometer needle.
The magnet and the sensing bar are not supposed to touch.
Given that your needle stuck at 20 mph, that might lead me to suspect something in the speedometer body.
You might be able to spin the cable at the angle adapter with a drill, and have someone watch the speedo for you…. But this won’t tell you if it’s in the cable or the instrument body.
You might need to pull the speedo out of the dash to isolate the problem…
Rocky
[ View Reply ]
|
| The De Tomaso Forums
You received this based on your notification settings. You can adjust your settings or unsubscribe anytime.
|
Sounds like a plan!
Keep us posted!
There is a good speedometer repair shop in Tucson (TJ’s Speedometer on Stone Ave).
If it’s in the instrument, he might be able to help, if you don’t have anyone local.
Rocky
THANKS FOR THE TIO I USUALLY USE NORTH HOLLYWOOD SPEEDOMETER
On Wednesday, July 24, 2024 at 03:21:10 PM PDT, The De Tomaso Forums <alerts@crowdstack.com> wrote:
| == To reply by email, write above this line. == |
|
New Reply By rocky
|
| SPEEDOMETER NOT METERINGReply by rocky
Sounds like a plan!
Keep us posted!
There is a good speedometer repair shop in Tucson (TJ’s Speedometer on Stone Ave).
If it’s in the instrument, he might be able to help, if you don’t have anyone local.
Rocky
[ View Reply ]
|
| The De Tomaso Forums
You received this based on your notification settings. You can adjust your settings or unsubscribe anytime.
|
On Wednesday, July 24, 2024 at 03:21:10 PM PDT, The De Tomaso Forums <alerts@crowdstack.com> wrote:
| == To reply by email, write above this line. == |
|
New Reply By rocky
|
| SPEEDOMETER NOT METERINGReply by rocky
Sounds like a plan!
Keep us posted!
There is a good speedometer repair shop in Tucson (TJ’s Speedometer on Stone Ave).
If it’s in the instrument, he might be able to help, if you don’t have anyone local.
Rocky
[ View Reply ]
|
| The De Tomaso Forums
You received this based on your notification settings. You can adjust your settings or unsubscribe anytime.
|
@rocky posted:The way a speedometer typically works is the speedo cable whirls a bar with a magnet on it, and the magnetic force is sensed by a bar connected th the speedometer needle.
The magnet and the sensing bar are not supposed to touch.
Given that your needle stuck at 20 mph, that might lead me to suspect something in the speedometer body.
You might be able to spin the cable at the angle adapter with a drill, and have someone watch the speedo for you…. But this won’t tell you if it’s in the cable or the instrument body.
You might need to pull the speedo out of the dash to isolate the problem…
Rocky
Agree… sounds like speedo… old caked up grease…
send it off….