What is axle tramp/hop? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
The Pub For General Discussion

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 05-10-03, 10:13 PM Thread Starter
Registered User
subsbligh35's Avatar
Join Date: Aug 2002
Location: Brisbane
Age: 33
Posts: 499
What is axle tramp/hop?

I know it sounds pretty basic but I've heard the expression but don't know exactly what it means.

subsbligh35 is offline  
Sponsored Links
post #2 of 4 (permalink) Old 05-11-03, 12:47 AM
Veteran Ford Member
Join Date: Feb 2002
Location: Searching for a new home
Posts: 3,657
These two aren't always exactly the same thing and there are a number of causes.

In simple terms axle tramp is what happens when a large dose of torque is delivered to the rear axle (such as a full bore launch) and the leaf spring (usually) deforms into an S shape and the spring rate increases exponentially until the wheel is actually bounced off the ground which in turn unloads the spring so the whoe cycle can be repeated until the torque is reduced sufficently and the spring stabilises.

Axle tramp can also occur any time one of the wheels becomes heavily unloaded or if there isn't sufficient suspension compliance to maintain road contact during heavy cornering.

It was always thought that axle tramp was the exclusive domain of leaf sprung rears but that hasn't proven to be the case.

That's not a very detailed explanation but it will do till I can write a tech article on the subject!

russellw is offline  
post #3 of 4 (permalink) Old 05-11-03, 04:03 AM
T5 Expert Operator
XR_Strider_GuY's Avatar
Join Date: Apr 2001
Location: 3Fb Skunk Works(JXR01 Dev)
Age: 37
Posts: 6,542
I found that axle tramp is not an easy thing to pin point as road surface has a great effect on whether a car axle tramps or not.

I found on my XR6 that on a certain bit of road where it's quite undulating, taking off full pelt induces axle tramp. But other times it's just alot of wheel spin but no axle tramp at all.

Oh yeah the feeling isn't good, feels like the diff, driveline gearbox is about to fall out of the car.

Motor May 2001 Quote: "Believe it or not, there are actually a bunch of weirdos out there who reckon a six cylinder is the dux gutz. Bugger it: I'm one of them" :s5

AUII Late Ed XR6 HP T5 Venom- Full Tickford Body Kit, 17in Wheels, Herrod Bi-plane Spoiler, Momo Steer/Gear, T-Series Interior Options, Premium Stereo and a very light-tuned 4.0L I6

(FPV-Tickford Club of NSW Member and Co-Founding Member of 3FB Inc, Ford Forums Food Bandits)
XR_Strider_GuY is offline  
post #4 of 4 (permalink) Old 05-11-03, 04:51 AM
Registered User
Martin's Avatar
Join Date: Feb 2001
Location: NSW/ACT
Posts: 3,023
Mine seems to do it BAD in the wet from a stop if I give it some. Never happened in the dry though?

1993 ED XR6 M5 (1 of 329)
Polynesian Green
Turbo on the way!!
1993 EBII Fairmont (Now wrecking, PM if you want any parts)
1988 Nissan R31 Skyline
Martin is offline  
Sponsored Links

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Fordforums Community > The Pub

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
axle codes Nirvana7456 Ford F-100 | Ford F-150 | Ford F-250 | Ford F-350 | Ford Super Duty | Ford Diesel 2 05-23-03 05:37 AM
ZF Lemforder to Supply Axle Systems to Ford CrossTrainer And Ford Five-Hundred From N Stacy94PGT Ford Taurus 2008+| Mercury Sable 2008+ | Lincoln MKS | Ford Five Hundred | Mercury Montego 0 08-05-02 10:49 AM
Axle tramp in AU XR8 with IRS ??? XR8chic Suspension | Wheels&Tires | Brakes 10 04-19-02 06:45 AM
need a 66 axle hawkrod Classic Thunderbirds 2 03-03-02 06:50 PM
rear axle noise dcrow Ford Mustang Forum 2 05-09-01 05:01 PM

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