• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

TR2/3/3A Speedometer needle bounce?

CJD

Yoda
Country flag
Offline
A regular bounce (about 2-3 per second) can be caused by a couple things. Most common would be a drive cable that is binding. The solution to that is to pull out the cable to clean and re-grease it for the full length. The other cause would be if the aluminum disc inside the speedo is bent, so it rubs against the magnet. The latter cause would only be possible if the speedo has been taken apart previously and not put back together properly. So money is on the speedo cable.

A rapid, but small, consistent fluctuation is normally from the odometer gears binding and in need of cleaning and lubrication. The gage has to come apart to do that too. If left too long, binding inside the gage will eventually unravel the drive cable.

A gentle bounce as you hit bumps and such is normal operation of a mechanical gage and cannot be changed. You can even make the tach needle bounce by Revington the motor quickly up and down...just the nature of the design. I once had a Vette that was so fast I could bounce the the speedo needle by accelerating so fast (0-60 in 2.3 sec).
 
Last edited:
Similar threads
Thread starter Title Forum Replies Date
D Bugeye Speedometer Needle Spridgets 13
M Sticking speedometer needle Triumph 2
Got_All_4 Bouncing Betty Speedometer Needle Triumph 7
davidk Speedometer needle jumping Triumph 29
M TR2/3/3A HVDA Speedometer Drive Triumph 10
GeorgetheTR3 TR2/3/3A Speedometer Triumph 4
jfarris For Sale TR3 Speedometer SOLD Triumph Classifieds 3
roscoe GPS Speedometer Austin Healey 6
J 1985 TVR 280i Speedometer Cable TVR 4
F TR4/4A Speedometer cable replacement access Triumph 0
DocDup1 MGB SpeedBox Speedometer Drive MG 0
R TR2/3/3A Speedometer Reset Triumph 26
BritBite Speedometer Right Angle Drive Austin Healey 5
roscoe GPS Speedometer Austin Healey 10
PAUL161 T-Series TD/TF speedometer gears. MG 3
AUSMHLY Speedometer Fluctuation Austin Healey 21
Magyar Rebuild Speedometer & Tachometer - mechanical or electronic? Spridgets 17
M TR6 Speedometer Triumph 2
S For Sale Early Sprite & Midget Speedometer/Tachometer/Generator etc. Spridgets Classified 2
P TR6 Jumpy Speedometer cable Triumph 4
PAUL161 T-Series Interesting Speedometer Scenario MG 5
John Turney Getting Speedometer out of the Case Austin Healey 6
P Speedometer confusion Spridgets 1
J TR2/3/3A Speedometer Bounce with Odometer Gear Movement - Benchtop Calibration Triumph 3
RJS TR4/4A Speedometer and Angle Drive Triumph 6
T Speedometer Repair Problem Austin Healey 5
J TR2/3/3A Speedometer Works Removal Triumph 10
R TR2/3/3A Speedometer Routing Triumph 15
KVH General Tech Speedometer Not Working Triumph 5
AUSMHLY 1962 3000 Mk II BT7 speedometer Austin Healey 2
K TR2/3/3A Speedometer Error Again Triumph 8
G Spitfire gps speedometer Triumph 6
J Speedometer Tach Correlation 1965 Austin Healey BJ8 Austin Healey 3
B For Sale MGA JAeger Fuel Gauge, Dual Safety Gauge, Speedometer and Tachometer MG Classifieds 0
B For Sale Austin Healey 100 Smiths Fuel Gauge, Dual Safety Gauge, Speedometer and Tachometer Austin Healey Classifieds 0
B For Sale Triumph Tr3 Fuel gauge Temp gauge Oil pressure gauge, speedometer tachometer Triumph Classifieds 0
S Speedometer Angle Drive Austin Healey 2
T Wanted WTB 100 / 4 Speedometer Austin Healey Classifieds 0
B Differences between BN2 and BN4 speedometer gears?? Austin Healey 7
F How does overdrive Annulus effect speedometer Austin Healey 10
M TR4/4A Speedometer Cable Routing Triumph 7
2 TR2/3/3A Can't get zero on speedometer 60K tr3A Triumph 6
B Speedometer Cable Routing Austin Healey 9
UmmYeahOk GT6 What do I need for a speedometer fix? Triumph 16
Michael Oritt Speedometer drive issue Austin Healey 4
R TR4/4A Speedometer off 10mph Triumph 6
R BN7 Speedometer issues Austin Healey 1
K TR2/3/3A Dismantling Speedometer...getting the odometer pin past the case??? Triumph 2
1 MGB Speedometer and tachometer on '66 MGB are not working MG 8
2 TR2/3/3A Non OD speedometer cable routing diagram/pictures. Triumph 7

Similar threads

Top