3.73 gear install - Mustang Evolution

Go Back   Mustang Evolution > Shelby | ROUSH | Boss | Saleen | SVT || Tech and Talk > Shelby Mustang



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 02-05-2013, 09:12 AM   #1
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
3.73 gear install

Hi guys new to Mustang but have some experience with cars in general.
I am in a process of swapping my stock gear to 3.73 and this a best pattern I managed to get using supplied washers.
Need your input.

LizardGT500 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-05-2013, 09:28 AM   #2
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
I have Ford's Ring and Pinion Installation INSTRUCTION SHEET
And also American Muscle's DIY

One says backlash to be .008"-.012"
The other .008 - .015 with the ideal being .012 - .015.
Attached Files
File Type: pdf FordInstShtM-4209-8.pdf (740.6 KB, 108 views)
File Type: pdf mustang-differential-gears-install.pdf (3.09 MB, 313 views)
LizardGT500 is offline   Reply With Quote
Old 02-05-2013, 08:36 PM   #3
Road Trip!
 
Join Date: Apr 2011
Region: Indiana
Posts: 8,044
ok, sorry it took me so long. what is your backlash?

Here is a chart that should help you find what you need to do. I wanted run it with the pattern you have. you need to do more shimming. If you have run out of shims try taking some out of one side and put them in the other. Usually you can get away with the factory shim pack that was under the pinion bearing and just adjust the carrier left or right as needed.
Attached Thumbnails
Click image for larger version

Name:	GearInfo2.GIF
Views:	367
Size:	32.8 KB
ID:	89388  
dreamstang is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-05-2013, 10:00 PM   #4
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
Quote:
Originally Posted by dreamstang View Post
ok, sorry it took me so long. what is your backlash?

Here is a chart that should help you find what you need to do. I wanted run it with the pattern you have. you need to do more shimming. If you have run out of shims try taking some out of one side and put them in the other. Usually you can get away with the factory shim pack that was under the pinion bearing and just adjust the carrier left or right as needed.

The backlash now is.015
Unfortunately I had to replace the stock pinion shim from 0.7mm to 0.4mm (sorry for metric) to be able to get more or less good pattern. 'Cause the big pinion on my SVT was thin one with the big spacer behid it, but the one that came with the kit was about the size of the old one+spacer. So stockshim of 7mm with backlash of 10 it was throwing drive pattern to the toe while coast side was more at heel. I am not too sure maybe I went too far with 0.4mm pinion...
Also. Could you please describe all 6 of each scenarios with pinon close and away? in the other words, why would same symptom be represented in the different patterns?
By any chance you may have picture of good patterns both drive and coast?
LizardGT500 is offline   Reply With Quote
Old 02-05-2013, 10:07 PM   #5
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
But from the other side I cannot match my coast pattern to any of them. So maybe I am OK with pinion shim and will be able do get away with reducing backlash.
This is strange, my drive side pattern is nice and smooth all over the surface...
LizardGT500 is offline   Reply With Quote
Old 02-05-2013, 10:09 PM   #6
Registered Member

Regular
 
Ubnbit's Avatar
 
Join Date: Jan 2013
Location: Tazewell
Region: Tennessee
Posts: 3,532
Hey, how about telling us what we need to know about doing our on gear swap? Seems as if you definitely have the knowledge about it. Who knows, I might change my Shelby to a 3.73 sometime.
__________________
Tint, louvers, Shelby brake light cover, sequentials, brake vent ring delete, Shorty antenna, JLT cold air intake, BAMA tune, VMP 2.5 S/C pulley, Ford racing shifter, MRT OR-H, SLP loudmouths, BMR adj PHB, BMR LCA, Eibach Pro-Kit, cobra jet big oval TB.
Ubnbit is online now   Reply With Quote
Old 02-05-2013, 11:50 PM   #7
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
Quote:
Originally Posted by dreamstang View Post
what is your backlash?
I've played around with the shims and managed do get .009 backlash and the following pattern.
Attached Thumbnails
Click image for larger version

Name:	Drive.jpg
Views:	193
Size:	237.2 KB
ID:	89423   Click image for larger version

Name:	Coast.jpg
Views:	167
Size:	209.6 KB
ID:	89424  

LizardGT500 is offline   Reply With Quote
Old 02-06-2013, 12:04 AM   #8
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
All in one.
I could not match this pattern to any of the chart(((
But from the other side it looks like it requires even thinner pinion shim according to Ford's procedure. Any suggestions?
Attached Thumbnails
Click image for larger version

Name:	all.JPG
Views:	324
Size:	230.8 KB
ID:	89431  
LizardGT500 is offline   Reply With Quote
Old 02-06-2013, 07:09 AM   #9
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
Removed shim from the pinion and here what I've got.
Backlash 0.009"
And the following pattern from the coast side
Attached Thumbnails
Click image for larger version

Name:	IMG_0347[1].JPG
Views:	172
Size:	757.4 KB
ID:	89455  
LizardGT500 is offline   Reply With Quote
Old 02-06-2013, 07:36 AM   #10
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
I cannot understand one thing. When Backlash is within specs 008"-012"/015" and the pattern doesn't match, does that mean that the pinion shim has to be adjusted or still could have work to do within that 008-015 range?

Here is a coast side patter from last 3 measurements as a drive ones are not that clear.
Attached Thumbnails
Click image for larger version

Name:	Untitled.jpg
Views:	139
Size:	238.0 KB
ID:	89459  
LizardGT500 is offline   Reply With Quote
Old 02-06-2013, 07:58 AM   #11
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
I am sory for dumping all this questions on you))) But pleas, could you go thgouh all the posts I've placed and see what answers you have for me. Probably it would be a good idea to skype or even talk on the phone so you could give me some basics about backlash/pattern adjustments.
Cause I can see now it is not only about reading and following the manual, some experience is a must here.
At this point it's a new rear axle assembly or I have to do it myself, as we do not have anyone here who could adjust the gears.
LizardGT500 is offline   Reply With Quote
Old 02-06-2013, 11:21 AM   #12
Road Trip!
 
Join Date: Apr 2011
Region: Indiana
Posts: 8,044
I will try my best to help you. I am by no means a proffesional but I have done a couple sets.

Ok when I get home from work I will look at the chart and your patterns a bit and see if I can better help you. If you adjust the carrier to get your pattern correct and loose backlash then you will most likely have to adjust the shims behind the pinion. Every set I have done I reused the factory shim pack that was behind the pinion and able to do all my adjustments moving the carrier side to side. Because let's face it, its a pita to adjust the pinion shims.

One other key thing. The shims on the sides of the carrier should be really tight. So tight that its hard to put in. You don't want the carrier to be able to move.

It is pretty critical to Mic all the shims when starting out. That way if you get out of alignment and need to start from scratch you have a base point.
dreamstang is offline   Reply With Quote
Old 02-07-2013, 07:31 AM   #13
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
I think I've got it.
0.4mm pinion shim and .012" backlash

LizardGT500 is offline   Reply With Quote
Old 02-07-2013, 09:10 AM   #14
Road Trip!
 
Join Date: Apr 2011
Region: Indiana
Posts: 8,044
Quote:
Originally Posted by LizardGT500
I think I've got it.
0.4mm pinion shim and .012" backlash
Yup. Looks good man. Next time will be easier now that you have done one. Good job.
dreamstang is offline   Reply With Quote
Old 02-07-2013, 04:47 PM   #15
Registered Member

Regular
 
Ubnbit's Avatar
 
Join Date: Jan 2013
Location: Tazewell
Region: Tennessee
Posts: 3,532
Quote:
Originally Posted by dreamstang View Post

Yup. Looks good man. Next time will be easier now that you have done one. Good job.
Congrats. I thought it would be an easy swap. That's something I've never done. Can handle pretty much anything. Sounds pretty tough though.
__________________
Tint, louvers, Shelby brake light cover, sequentials, brake vent ring delete, Shorty antenna, JLT cold air intake, BAMA tune, VMP 2.5 S/C pulley, Ford racing shifter, MRT OR-H, SLP loudmouths, BMR adj PHB, BMR LCA, Eibach Pro-Kit, cobra jet big oval TB.
Ubnbit is online now   Reply With Quote
Old 02-07-2013, 05:03 PM   #16
Road Trip!
 
Join Date: Apr 2011
Region: Indiana
Posts: 8,044
Quote:
Originally Posted by Ubnbit View Post
Congrats. I thought it would be an easy swap. That's something I've never done. Can handle pretty much anything. Sounds pretty tough though.
Most people wont mess with gears. They can be a bit tricky. And also its best to have some specialty tools that most people don't have in there garage. But imo if you take your time and follow directions it is a pretty doable job.
dreamstang is offline   Reply With Quote
Old 02-08-2013, 04:42 AM   #17
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
This source helped me a lot on backlash basics.
LizardGT500 is offline   Reply With Quote
Old 02-08-2013, 06:23 AM   #18
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
It seems like my quest is not over yet.))
I did not payed attention on disassembly but now that I've put every thing together I found out that there is a little lateral axle play less or about 1mm on both axles. Is it supposed to be like that or I've messed something?
LizardGT500 is offline   Reply With Quote
Old 02-08-2013, 06:26 AM   #19
Road Trip!
 
Join Date: Apr 2011
Region: Indiana
Posts: 8,044
Quote:
Originally Posted by LizardGT500
It seems like my quest is not over yet.))
I did not payed attention on disassembly but now that I've put every thing together I found out that there is a little lateral axle play less or about 1mm on both axles. Is it supposed to be like that or I've messed something?
You saying the axle will move in and out correct? This is normal. It's part of the c clip design. There really isn't anything you can do about it.

You should remember it being able to do this when you first pulled the axles when you started disassembly.
dreamstang is offline   Reply With Quote
Old 02-09-2013, 11:50 AM   #20
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
You made my day)))
Now it's all about a good sunny day to make an install))) Not nice to work under the car on a driveway while it's raining)
Attached Thumbnails
Click image for larger version

Name:	IMG_0348.JPG
Views:	158
Size:	239.8 KB
ID:	89956  
LizardGT500 is offline   Reply With Quote
Old 02-09-2013, 03:44 PM   #21
Road Trip!
 
Join Date: Apr 2011
Region: Indiana
Posts: 8,044
Quote:
Originally Posted by LizardGT500
You made my day)))
Now it's all about a good sunny day to make an install))) Not nice to work under the car on a driveway while it's raining)
One more thing. Don't forget to break it in. I have got on it a bit after installation. But I wouldn't be ripping the tires off for the first 500 miles.
dreamstang is offline   Reply With Quote
Old 03-07-2013, 12:48 PM   #22
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
300 miles, so far so good. Haven't hammered it yet though.
LizardGT500 is offline   Reply With Quote
Old 03-07-2013, 01:02 PM   #23
Road Trip!
 
Join Date: Apr 2011
Region: Indiana
Posts: 8,044
Nice. It's hard not to hammer it eh?
dreamstang is offline   Reply With Quote
Old 03-07-2013, 01:09 PM   #24
Registered User
Newbie
 
LizardGT500's Avatar
 
Join Date: Feb 2013
Location: Baku
Region: Other
Posts: 16
Quote:
Originally Posted by dreamstang View Post
Nice. It's hard not to hammer it eh?
I love the way the car response to the throttle now Much more friendly in a traffic. Not a surprise the clutches are being eaten sooo quick with a stock gear. 6 is more usable now)))
LizardGT500 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > Shelby | ROUSH | Boss | Saleen | SVT || Tech and Talk > Shelby Mustang

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are On
Refbacks are Off


» Like Us On Facebook



09:36 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.