Hairspring anyone?

[coupesport]

I'm refurbishing the speedometer/odometer and found needle's tensioning spring is all screwed up.
Does anyone have or have a speedometer they can offer?

Thanks, Rob

 

[Thomas76]

I may have what you're looking for but won't be home to look till next weekend.
E9 speedos have different gears in them to accommodate for different drive lines so be careful purchasing a complete unit.

 

[rsporsche]

be sure to read @HB Chris wonderful FAQ on speedos + diff ratios

Thread 'Speedometer and Differential Ratios'

Jul 28, 2020

The e9 coupes came with three differential ratios and could be found both open or unlocked and locked or LSD. The speedometers were matched to the car based on which differential was fitted.

Differentials

The differential ratio is expressed as a fraction and is stamped on the right lower side of the differential on a flat boss. The presence of a stamped or painted S indicates locked or LSD.

3.25 = 39/12
3.45 = 38/11
3.64 = 40/11

These differentials were typically found on these models:

3.25 Open - CSi
3.25 LSD 25% locking - CSi and CSil
3.45 Open - Euro 3.0CS/CSA
3.45 LSD 25%...

• HB Chris
• Replies: 5
• Forum: FAQ - Frequently Asked Questions

• 

you need to know what the speedo number is on your car so you get the right one.

 

[lip277]

Many years ago (before my car went to SFDon's), my wife poked her head into my office and asked what I was doing on the computer.
I told her I am researching Coupe's and LSD's. She gave me the most quizzed look I have seen from her in a long time. LOL