new diff, speedo out - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 07-20-2004, 04:43   #1 (permalink)
Registered User
 
Join Date: Mar 2004
Posts: 27
new diff, speedo out

guys i just got my diff built up from diff technics. 3.45:1 lsd fully rebuilt brand spanka ready for running in for $1100,

my question now is have i put the speedo out. the old ratio was 3.23:1 and the new 1 is 3.45:1 would i have put the speedo out?
__________________
.480 lift cam, heavy duty valve spring, ported polished inlet manifold, shaved head, soon 3.45:1 lsd and full exhaust system
Gli 5 Speed is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-20-2004, 04:49   #2 (permalink)
Registered User
 
Join Date: Feb 2003
Location: Sydney
Age: 54
Posts: 629
Re: new diff, speedo out

If you have an EF then your speedo is out by about 5%.

It reads 100kmh your going only 95kmh really. you hit the speed limiter at 180kmh and its really only going 171kmh.

You need to get a new speedo drive gear to fix it. less than $10 from Ford and 10 minutes to fit.

You have probably got a light green 21 tooth gear so if you buy a grey 22 tooth gear all will be back to normal. Well almost. If its an auto it will now hold the gears 5% longer before changing up but that will be good if you like to rev it a bit.
jonbays is offline   Reply With Quote
Old 07-20-2004, 05:06   #3 (permalink)
Registered User
 
Join Date: Mar 2004
Posts: 27
Re: new diff, speedo out

its an el manaul, id imagine same compared to ef
__________________
.480 lift cam, heavy duty valve spring, ported polished inlet manifold, shaved head, soon 3.45:1 lsd and full exhaust system
Gli 5 Speed is offline   Reply With Quote
Old 07-20-2004, 05:09   #4 (permalink)
Experimental Racer#6
 
TIKFD6's Avatar
 
Join Date: Nov 2000
Location: Wodonga Vic
Age: 41
Posts: 8,204
Re: new diff, speedo out

YOu can get drive gears from Ford for about $15.
Go for an XR6 gear.
TIKFD6 is offline   Reply With Quote
Old 07-20-2004, 06:02   #5 (permalink)
Veteran Ford Member
 
Join Date: Jan 2003
Location: Melbourne, Australia
Age: 28
Posts: 5,083
Re: new diff, speedo out

Shouldn't it be 23 tooth black? I know that's what I've got in mine, unless the T5 is different.
psycho chicken is offline   Reply With Quote
Old 07-20-2004, 07:35   #6 (permalink)
'90 EA-II Fairmont
 
SileNceR's Avatar
 
Join Date: Aug 2003
Location: Warrnambool, VIC, Aust.
Age: 29
Posts: 572
Re: new diff, speedo out

the 3.45 is grey IIRC, thats whats in mine and it's pretty accurate far as i can tell
__________________
Rosewood EAII Fairmont 02/90. MPFI 3.9L (formerly CFI), 4spd BTR Auto. Skyline geared 3.45g open center 28 spline 4 pinion differential & axles. 2 1/2" Cat Back Exhaust. King Super Low Springs. Sound: Equalization and amplification by Clarion; Head unit by Sony, Front, Rears and Sub by Pioneer. Planned mods - t5, Extractors, Painting Grey Strips and new front and rear bar.
SileNceR is offline   Reply With Quote
Old 07-20-2004, 18:27   #7 (permalink)
Experimental Racer#6
 
TIKFD6's Avatar
 
Join Date: Nov 2000
Location: Wodonga Vic
Age: 41
Posts: 8,204
Re: new diff, speedo out

light grey 21 tooth.
TIKFD6 is offline   Reply With Quote
Old 07-20-2004, 20:44   #8 (permalink)
Registered User
 
Join Date: Feb 2003
Location: Sydney
Age: 54
Posts: 629
Re: new diff, speedo out

No Light green is 21 teeth.

These are all the options

Colour Driving Gears Part Number
Purple 19 XE17271A
Pink 19 XE17271B
Brown 20 XE17271C
Light Green 21 XE17271D
Grey 22 XE17271E
Black 23 XE17271F

Do the maths like this and try and get closest to 1 as being exactly corrected

current ratio divided by new ratio times new gear teeth divided by current gear teeth.

Your EL for example 3.23/3.45X22/21=0.98 that means speedo still reads 2% fast. This is OK better fast than slow for radar.

My wagon 3.23/3.73X23/20=0.996 speedo reads 0.4% fast OK.
jonbays is offline   Reply With Quote
Old 07-21-2004, 03:29   #9 (permalink)
Experimental Racer#6
 
TIKFD6's Avatar
 
Join Date: Nov 2000
Location: Wodonga Vic
Age: 41
Posts: 8,204
Re: new diff, speedo out

Thanks Jonbays.

All i did was buy the next one down fromwhat is was sposed to be, try it , if i didnt work i got the next one down.

Yep yoru right, the one in teh car is a 22 tooth grey, and i have a spare 22 and a green 21.
TIKFD6 is offline   Reply With Quote
Old 07-21-2004, 03:45   #10 (permalink)
'90 EA-II Fairmont
 
SileNceR's Avatar
 
Join Date: Aug 2003
Location: Warrnambool, VIC, Aust.
Age: 29
Posts: 572
Re: new diff, speedo out

grey is what ford specify for a manual XR6 (3.45LSD)
__________________
Rosewood EAII Fairmont 02/90. MPFI 3.9L (formerly CFI), 4spd BTR Auto. Skyline geared 3.45g open center 28 spline 4 pinion differential & axles. 2 1/2" Cat Back Exhaust. King Super Low Springs. Sound: Equalization and amplification by Clarion; Head unit by Sony, Front, Rears and Sub by Pioneer. Planned mods - t5, Extractors, Painting Grey Strips and new front and rear bar.
SileNceR is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Queries for EF diff onto EBII? Please help! BOSXR8 Trans | Driveline 3 06-27-2004 05:31
What speedo gear for 3.27 diff with t5? PooheyThomo Trans | Driveline 4 04-04-2004 10:00
Please help with speedo drive gears for 3.9 diff.... Rollin Trans | Driveline 65 08-11-2003 03:50
Another diff and speedo question.. Axeman82 Trans | Driveline 2 07-10-2003 03:10
Doc's 427ci XR8.... THE DOCTOR The Pub 74 08-15-2001 11:54

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 13:02.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.