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Engine Specific Info and Questions => IDI Engine => Topic started by: dieselherb1 on July 14, 2012, 09:23:59 am

Title: Speedo problems
Post by: dieselherb1 on July 14, 2012, 09:23:59 am

Replaced 4 speed trans with 5 speed ACN trans now speedo off by 30% at least. Will a change in gears fix that? Or what can I do?

Title: Re: Speedo problems
Post by: 92EcoDiesel Jetta on July 14, 2012, 09:35:33 am

You need to swap the red speedo gear from the ACN to the cable. I swapped from an AVX to ACN and the red gear was spot on.

I had a very stubborn red gear, wouldn't come off. Had to put the old cable in a vise and hammer it off, while the green gear from the AVX yanked off easily by hand.

Title: Re: Speedo problems
Post by: dieselherb1 on July 16, 2012, 06:03:12 am

Are you saying remove red gear from cable of the car that the ACN came from? That car has long since been crushed.

Title: Re: Speedo problems
Post by: theman53 on July 16, 2012, 07:15:06 am

Buy a new red gear. Ebay had them when I was looking. Yes the gear should get you back to normal.

Title: Re: Speedo problems
Post by: R.O.R-2.0 on July 17, 2012, 10:45:34 am

you need to match the speedo gear to the ring and pinion ratio..

red = 3.67
white/gray = 3.89/3.94
green = 4.25

if you dont have the right gear for the R&P you are running, then it will never be accurate.