Diff / Gearbox angles ? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 05-12-05, 01:27 AM Thread Starter
Mr XE
 
Join Date: May 2005
Location: nowra
Posts: 7
Diff / Gearbox angles ?

I've replaced my busted C4 with a reco toploaed, i still run a standard borg warner rear end lowered about 1 1/2 inches. The car constantly munches out rear uni joints, i've had the front pinion bearing replaced and the tailshaft balanced. A mate from work sugested that my angles are wrong, i dont understand why though i've had a fair few lowered XE falcons befor and never had a problems like this. Has anyone else out there had any problems like this befor with toploaders in XE falcons?

Thanks for having a read and any help would be greatly appreciated.
Cheers.
mr_xe is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 05-12-05, 04:42 AM
Registered User
 
Join Date: Sep 2004
Location: Country NSW
Posts: 268
Re: Diff / Gearbox angles ?

Lowering the car increases the included angles that the uni joints runs at. Uni joints have specific angles that are ideal for long life. The big killer though for uni joints is tramping the rear axle; they cannot handle this.
silicon is offline  
post #3 of 13 (permalink) Old 05-12-05, 04:49 AM Thread Starter
Mr XE
 
Join Date: May 2005
Location: nowra
Posts: 7
Re: Diff / Gearbox angles ?

apart from raising the ride height of the car what can be done to stop these problems?
mr_xe is offline  
post #4 of 13 (permalink) Old 05-12-05, 06:15 AM
Registered User
 
Join Date: Sep 2004
Location: Country NSW
Posts: 268
Re: Diff / Gearbox angles ?

Quote:
Originally Posted by mr_xe
apart from raising the ride height of the car what can be done to stop these problems?

Are you having axle tramp?

If you are then fitting radius rods (tramp rods) will limit the diff twisting/rotating the pinnion upwards and stop the massive angles being experienced by the uni joints.
silicon is offline  
post #5 of 13 (permalink) Old 05-12-05, 06:53 PM Thread Starter
Mr XE
 
Join Date: May 2005
Location: nowra
Posts: 7
Re: Diff / Gearbox angles ?

XE falcons have a factory 4 link styled rear end, i've never had any sign of axle tramp. The tail shaft is running parallel to the ground and is very straight between diff and box so i don't think that excessive angles are the problem.
mr_xe is offline  
post #6 of 13 (permalink) Old 05-12-05, 09:13 PM
Registered User
 
Join Date: Sep 2004
Location: Country NSW
Posts: 268
Re: Diff / Gearbox angles ?

Quote:
Originally Posted by mr_xe
XE falcons have a factory 4 link styled rear end, i've never had any sign of axle tramp. The tail shaft is running parallel to the ground and is very straight between diff and box so i don't think that excessive angles are the problem.

Sorry about that. Running the unis too straight i.e. no working angle is bad for them as well. What brand of uni joints are you running.
silicon is offline  
post #7 of 13 (permalink) Old 05-12-05, 09:30 PM
Registered User
 
Racer's Avatar
 
Join Date: Oct 2002
Location: Sydney
Posts: 992
Re: Diff / Gearbox angles ?

The box and diff centrelines should be as parrallel as possible.
Racer is offline  
post #8 of 13 (permalink) Old 05-12-05, 09:36 PM Thread Starter
Mr XE
 
Join Date: May 2005
Location: nowra
Posts: 7
Re: Diff / Gearbox angles ?

ive tryed just about every sort i could find, ive been changing the unis all most weekly.
so would you konw why is this car having these problems when my others didnt??? could it be because of the way the toploader sits under the car as apossed to other gear boxes? this is the only xe that ive owned with a toploader i think it could have something to do with that.
mr_xe is offline  
post #9 of 13 (permalink) Old 05-13-05, 05:55 PM
Registered User
 
Join Date: Sep 2004
Location: Country NSW
Posts: 268
Re: Diff / Gearbox angles ?

http://www.superchevy-web.com/techni...203sc_driving/

http://www.carcraft.com/howto/91758/

You can buy a cheap angle guage at Mitre 10 for around $5-$10 from memory.

I have to ask; it is not possible that you are damaging the uni joint on installation? Something has to severly wrong to chop out uni joints in a week or two.
silicon is offline  
post #10 of 13 (permalink) Old 05-13-05, 08:52 PM
74 XB Fairmont
 
brenx's Avatar
 
Join Date: Sep 2001
Location: Cranbourne, Vic
Posts: 5,113
Re: Diff / Gearbox angles ?

I used to be the same. The fix was remove lowering blocks and reset leaf springs

XB Fairmont (street car) 11.07@123.02mph.
brenx is offline  
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Trans | Driveline
Gear in this thread - Powered by O'Reilly Auto Parts


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome