Speedo drive gears

UK_Stang · 08-25-2002, 02:39 AM

I have had Ford Motorsport 3.55 gears put in my 1990 GT and it pushed the speedo 10 mph fast. I was given a black speedo drive gear to replace the white one in the gearbox, but this was not really any better. I have since fitted 17 inch wheels with 235/45/17 tyres and the speedo is now being ignored!! Does anyone know what type of gear I should be using??

The car is a 5 speed.

Cheers

PKRWUD · 08-25-2002, 02:47 AM

The black 20 tooth gear is the correct one, but with those tires, you'll do better with the pink 19 tooth gear.

Take care,
~Chris

UK_Stang · 08-25-2002, 03:01 AM

Cheers

, I should have counted the number of teeth on the back one first, but seeing as they ar not expensive, a pink one it is!!

PKRWUD · 08-25-2002, 03:03 AM

It's what, about 8am there right now?

RPM427 · 08-26-2002, 08:40 AM

http://forums.mustangworks.com/showt...ghlight=speedo

UK_Stang · 08-27-2002, 04:21 AM

It was 9:00am I think, this forum seems to be in GMT for some reason!!

UK_Stang · 08-27-2002, 04:35 AM

Really strange!! I was given a black gear to fit when I had my gears done, by a race car builders who knwo all about Mustangs, I can only assume it was a 20T one, but the speedo is still 10mph fast, I have 235/45/17 on my car and the Hanlon Motorsport website says thats what I should have. If I had 245/45/17 then I would need the 19T one, think I might just buy one anyway to try and solve this mystery!!

08-25-2002, 02:39 AM	#1
UK_Stang Registered Member Join Date: Mar 2002 Posts: 28	Speedo drive gears I have had Ford Motorsport 3.55 gears put in my 1990 GT and it pushed the speedo 10 mph fast. I was given a black speedo drive gear to replace the white one in the gearbox, but this was not really any better. I have since fitted 17 inch wheels with 235/45/17 tyres and the speedo is now being ignored!! Does anyone know what type of gear I should be using?? The car is a 5 speed. Cheers

08-25-2002, 02:47 AM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	The black 20 tooth gear is the correct one, but with those tires, you'll do better with the pink 19 tooth gear. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

08-25-2002, 03:03 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It's what, about 8am there right now? __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

08-26-2002, 08:40 AM	#5
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	http://forums.mustangworks.com/showt...ghlight=speedo __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!

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08-25-2002, 03:01 AM	#3
UK_Stang Registered Member Join Date: Mar 2002 Posts: 28	Cheers , I should have counted the number of teeth on the back one first, but seeing as they ar not expensive, a pink one it is!!

08-27-2002, 04:21 AM	#6
UK_Stang Registered Member Join Date: Mar 2002 Posts: 28	It was 9:00am I think, this forum seems to be in GMT for some reason!!

08-27-2002, 04:35 AM	#7
UK_Stang Registered Member Join Date: Mar 2002 Posts: 28	Really strange!! I was given a black gear to fit when I had my gears done, by a race car builders who knwo all about Mustangs, I can only assume it was a 20T one, but the speedo is still 10mph fast, I have 235/45/17 on my car and the Hanlon Motorsport website says thats what I should have. If I had 245/45/17 then I would need the 19T one, think I might just buy one anyway to try and solve this mystery!!