• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Is this true..........?

  • Thread starter Thread starter manpowermustang
  • Start date Start date Dec 12, 2004
M

manpowermustang

Member
Sep 25, 2004
228
0
16
Milwaukee, Wi
Dec 12, 2004
#1
  • Dec 12, 2004
  • #1
Ive heard this alot in the past year and did a search and came across this. I heard that if you change you ring and pinion with Ford gears you can use the same spacers and shim.

I picked up a set of 3.73's to replace my 2.73's and I got Ford gears. I read in alot of threads that guys where able to just swao the gears and use the same shims and they where perfect, even the back lash was right on too.

anybody know of this? I have my differenctial out of my car and up on the work bench awaiting new gears.
 
M

mackey

Active Member
Jan 25, 2003
1,284
1
38
Beverly, Massachusetts
Dec 12, 2004
#2
  • Dec 12, 2004
  • #2
When I purchased my FRPP Gears they came with new spacers and shims... Why put the old ones back in? They would be worn down some which isn't too good for the rearend.
 
M

manpowermustang

Member
Sep 25, 2004
228
0
16
Milwaukee, Wi
Dec 12, 2004
#3
  • Dec 12, 2004
  • #3
I can see the pinion shim wearing out but not the carrier ones, there no movement to let this occur.

Anyways, I was more concerend w/ what I read from many post and crap on people using these gears and having them set up perfect w/ the stock shims.

Well'p?????????
 

green

New Member
Apr 26, 2003
291
0
0
Dec 12, 2004
#4
  • Dec 12, 2004
  • #4
that might be allright to do but i would throw in the new shims to be safe
 
M

manpowermustang

Member
Sep 25, 2004
228
0
16
Milwaukee, Wi
Dec 12, 2004
#5
  • Dec 12, 2004
  • #5
any other gear heads?
 

89MustangGX

I have nothing productive to add!
Jul 3, 2001
10,262
1
0
Mill Creek, WA
Dec 12, 2004
#6
  • Dec 12, 2004
  • #6
I believe the pinion setup is most of the time the same, but the carrier shims need to be checked.

I'd check them all anyway with the amount of work involved in tearing it back apart when you realize it's not right.
 
M

manpowermustang

Member
Sep 25, 2004
228
0
16
Milwaukee, Wi
Dec 12, 2004
#7
  • Dec 12, 2004
  • #7
Ill still use marking compomd to check them. I just ask this cause I rather do all th e work on my car, Ill pay to have a bearing pressed but thats pushing it. I did all the work on my motor from machining it to assemablay. I feel this is the way to know your car.

Anyways I just heard from so many that you can do it, meaning if you use Ford gears.
 

giddyup306

Founding Member
Oct 22, 2002
3,041
2
59
Dec 12, 2004
#8
  • Dec 12, 2004
  • #8
manpowermustang said:
Ive heard this alot in the past year and did a search and came across this. I heard that if you change you ring and pinion with Ford gears you can use the same spacers and shim.
Click to expand...


Yeah you can. They don't have any wear on them. I like to reuse them that way I know it's put together the same way.
 
M

manpowermustang

Member
Sep 25, 2004
228
0
16
Milwaukee, Wi
Dec 12, 2004
#9
  • Dec 12, 2004
  • #9
So this is somrthing that is do'able?
 

HardmanGT

Founding Member
Oct 5, 2001
500
0
17
Thomaston, CT
Dec 12, 2004
#10
  • Dec 12, 2004
  • #10
You can use the same pinion and carrier shims. 99% of the time when you use FRPP or stock Ford gears you can leave the carrier shims alone. Generally, the existing pinion shim will be used on the new pinion gear.

Here is a link for the Master Housing Dimension method

Link
 
M

manpowermustang

Member
Sep 25, 2004
228
0
16
Milwaukee, Wi
Dec 12, 2004
#11
  • Dec 12, 2004
  • #11
Thanks guys Ive good alota good feed back on this subject. I feel pretty confident on this task. Atleast the differential is up on my bench so it will be easier to work on, if I can buils and machine the motor I can do this, plus it gives me a reason to by a bearing press and a dial indicator.

Thanks,

Jason
 

rd

Founding Member
Jan 12, 2000
3,316
63
109
Ocean Springs MS
Dec 12, 2004
#12
  • Dec 12, 2004
  • #12
My 7.5 in axle set up ok with the stock shims, using Ford gears.

I just did a Motive gear in an 8.8, and I used a different pinion shim.

The carrier seemed fine with the stock Ford side shims, so back in they went. Got .009 in backlash.

Ran about 10 miles today and so far so good.

Its doable. I built a case spreader, but I have heard of plenty of people tapping the carrier shims back in. Crushing the crush collar seemed like it took 350 ft lbs to get started.
 
You must log in or register to reply here.

Similar threads

3
Eight inches is enough for me...
  • 351MooseStang
  • Nov 27, 2025
  • 1974 - 1978 Mustang II Talk & Tech
Replies
5
Views
770
1974 - 1978 Mustang II Talk & Tech Mar 2, 2026
Bullitt347
T
1967 coupe gearing
  • TMVT
  • Nov 6, 2025
  • Classic Mustang Specific Tech
Replies
1
Views
165
Classic Mustang Specific Tech Nov 6, 2025
Noobz347
J
2004 Mustang 3.8L V6 vibrations above 65 MPH and differential leaks
  • joeybuddy96
  • Mar 16, 2026
  • SN95 V6 Mustang Tech
Replies
17
Views
983
SN95 V6 Mustang Tech Aug 29, 2026
joeybuddy96
J
B
Idler pulley as substitute for Power Steering Pump ?
  • Bhenders
  • Jul 15, 2026
  • Other Auto Tech
Replies
5
Views
320
Other Auto Tech Jul 16, 2026
LILCBRA
S
Cobra 8.8 differential rebuild shop question
  • Sestemybe
  • Aug 5, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
4
Views
455
1996 - 2004 SN95 Mustang -General/Talk- Nov 15, 2025
baileygruwell
B
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?