2003-04 Mach 1 Registry Owners Club  


Go Back   2003-04 Mach 1 Registry Owners Club > "GO" Discussions > Engine & Drivetrain (Including trans & rear axles)

Reply
 
Thread Tools Display Modes
Old 08-06-2020, 10:13 PM   #1
Davidw04
Registered User
 
Join Date: Jun 2015
Location: East haven ct
Posts: 36
Need help clutch or rear diff.

I’m having an issue and I don’t know what it is. When I do a mild launch on my car the tires start to spin then is they stop and seems like it’s slipping. Can figure out if it’s the clutch or too much friction modifier in the rear. When I replaced the rear differential fluid I used the royal purple limited slip oil plus almost a whole 4 oz bottle of Ford friction modifier because I didn’t notice the royal purple had it in it already. Car has 58k miles on it. What are your thought? Thank you
Davidw04 is offline   Reply With Quote
Old 08-06-2020, 11:23 PM   #2
jbrad88
Original Owner
 
jbrad88's Avatar
 
Join Date: Apr 2003
Location: Houston, Texas
Posts: 5,172
Re: Need help clutch or rear diff.

If you go to the LMR website where they have the royal purple for sale there is a note toward the bottom that basically says although their gear oil has some FM in it you still need to add the ford FM. They actually include it in the package.

Slipping after you get traction? So the tires spin and then you get traction. From there what happens? Is the engine revving more freely? Car stops moving forward? What does it do under normal driving/launch?

Little more detail if you can. Would like to help.
Attached Thumbnails
F2B9AAA9-DB39-49FE-99C0-180F4E6D39F5.jpg  
__________________
JB

03 Torch Red Mach 1
21 FJG Mach 1


Stainless Steel Systems Adrenaline Series
BBK long tube headers catted x pipe
18x9 18x10- Solid Gloss Black FR5's
Nitto 555 g2 275/35r18's 285/35r18
MGW Shifter With Mach1 Shift Knob
4.10's & 31 spline Mosers and 31 Spline Posi
Steeda Sport Springs Tokiko Illuminas
J@M weight Jacker LCA's
J@M Rear UCA's
J@M Braided steel brake lines
Eibach Sway Bars
jbrad88 is offline   Reply With Quote
Old 08-06-2020, 11:32 PM   #3
Davidw04
Registered User
 
Join Date: Jun 2015
Location: East haven ct
Posts: 36
Re: Need help clutch or rear diff.

I will take it out again tomorrow and pay closer attention to it but I feels like the the tires spin and the car starts going sideways then falls on it’s face. I do have 4:10 rear gears and even have a hard time breaking the tires loose when I mash on the gas in second or try chirping them. Also have the occasional issue going into reverse where I have to go into first then reverse or it will grind. Traction control is off when I tried the mild launches. They are new Bridgestone potenzas so maybe they are catching traction and I’m not on the gas enough and that may also be why I can chirp gears. May have to put my stock wheels on to see how it drives

Last edited by Davidw04; 08-07-2020 at 08:54 AM.
Davidw04 is offline   Reply With Quote
Old 08-09-2020, 11:52 AM   #4
bris09
Registered User
 
bris09's Avatar
 
Join Date: Oct 2004
Location: Middletown, PA
Posts: 3,991
Re: Need help clutch or rear diff.

Having run the Potenzas I will note that they grab pretty good once warm. That said, with 4:10 gears you should be able to over power them. If the rpms are increasing but the car isn't pulling at the same rate (assuming no wheel spin) I would be leaning towards the clutch. Would think slipping in the rear would just result in only one wheel spinning. If the car is bogging after the tires grab, it is neither the clutch nor the rear, would be looking towards the engine.
__________________
Brian
04 Azure Mach 1
Mods:
Enough to not be the slowest, but nowhere near enough to be the fastest.

17 Fusion Sport
Now faster than the Mach

96 Laser Red Cobra Vert
For those days you just wanna cruise with the top down

89 Shelby CSX
Still rocking the VNT and Fiberides.
bris09 is offline   Reply With Quote
Old 08-09-2020, 06:26 PM   #5
bristol16
Registered User
 
Join Date: May 2018
Location: Worcester, MA
Posts: 29
Re: Need help clutch or rear diff.

Quote:
Originally Posted by bris09 View Post
Having run the Potenzas I will note that they grab pretty good once warm. That said, with 4:10 gears you should be able to over power them. If the rpms are increasing but the car isn't pulling at the same rate (assuming no wheel spin) I would be leaning towards the clutch. Would think slipping in the rear would just result in only one wheel spinning. If the car is bogging after the tires grab, it is neither the clutch nor the rear, would be looking towards the engine.
i was thinking the same thing...if something was slipping the engine would keep revving, not "fall on it's face" as described. in the OPs second post. sounds more like the tires are getting traction after breaking loose and the car bogs down....car just needs more power to prevent that.
bristol16 is offline   Reply With Quote
Old 08-10-2020, 12:30 AM   #6
Davidw04
Registered User
 
Join Date: Jun 2015
Location: East haven ct
Posts: 36
Re: Need help clutch or rear diff.

This is a car I don’t drive very often so I’m thinking it’s all me. I can launch it in either first or second gear and get the tires to spin and the car doesn’t bog I must have been too light on the gas the other day and the tires must of caught traction.
Davidw04 is offline   Reply With Quote
Old 09-02-2020, 05:14 PM   #7
ASH302
Soldier for Christ
 
ASH302's Avatar
 
Join Date: May 2009
Location: Willis, TX at The Daddy ASh Ranch
Posts: 30,596
Re: Need help clutch or rear diff.

i'm just going to toss this out there, did you push the traction button so it will spin them? Just a thought, it happens to the best of us.

ASh
__________________
2001 lazer red v6 Mustang coupe sold in Aug 2006
2004 screaming yellow 5.0 sc Mach 1 sold in Oct 2012
2013 grey 6 speed coupe GT Mustang Sold in Feb 2014
2013 RED Dodge Charger R/T Sold Nov 2014
2002 custom Blue 02 Auto Trans AM Sold June 2015
1998 Cobra Black Sold summer 2016

Current
2009 Ford F350 FX4 March 2017 (work truck)
2003 OW 5.0 Mach 1 Aug 2020

ASh
ASH302 is offline   Reply With Quote
Reply


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

Forum Jump


All times are GMT -4. The time now is 11:30 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
(c) 2002-2013 Mach1Registry.com

<