Rythmic thump after hard acceleration
Fleet Mechanic
Joined: Jul 2010
Posts: 1,753
Likes: 34
From: Los Angeles, Ca.
The broken gear probably has nothing to do with the TrueTrac.
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
I never put one in so wasn't thinking. You here so much good things about them you just wouldn't think this would be a problem. Install means everything.
Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
Metallurgy means everything.
Thread Starter
|
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,110
Likes: 4,715
From: Henderson, NV
Welp, the differential, pinion and pinion bearing cups are out of the pumpkin. Just waiting on parts to show up now. Here's another pic of carnage for your viewing pleasure.
Thread Starter
|
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,110
Likes: 4,715
From: Henderson, NV
Bonanza35, it was just regular acceleration onto the freeway. I do tow quite a bit though. I was unloaded at the time.
One thing that just crossed my mind is that I discovered my pinion had some axial play in it about a year ago. I tightened up the yoke nut and that seemed to cure it. Fast forward to today I noticed the teeth that broke on the ring gear broke towards the heels of the teeth. That indicates to me the pinion depth was too far away from the ring gear. I wonder if the shop that performed the previous install failed to seat the inner pinion bearing cup fully in the case. The cup then seated further into the case leading to axial play in the pinion. My tightening of the yoke nut then seated it all the way, leading to incorrect pinion depth.
One good bit of news is that all bearings are in good shape and not pitted. I'm replacing them anyway.
One thing that just crossed my mind is that I discovered my pinion had some axial play in it about a year ago. I tightened up the yoke nut and that seemed to cure it. Fast forward to today I noticed the teeth that broke on the ring gear broke towards the heels of the teeth. That indicates to me the pinion depth was too far away from the ring gear. I wonder if the shop that performed the previous install failed to seat the inner pinion bearing cup fully in the case. The cup then seated further into the case leading to axial play in the pinion. My tightening of the yoke nut then seated it all the way, leading to incorrect pinion depth.
One good bit of news is that all bearings are in good shape and not pitted. I'm replacing them anyway.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Tuned
Joined: Dec 2016
Posts: 260
Likes: 6
From: Southern Middle TN
Just wow. Man that stinks!
I have considered putting in a True Trac but have balked at the fact that if not set correctly “this” could happen.
Hope you have the time to write up the install, from a purely selfish reason.
Either way good luck on getting the pumpkin back together.
I have considered putting in a True Trac but have balked at the fact that if not set correctly “this” could happen.
Hope you have the time to write up the install, from a purely selfish reason.
Either way good luck on getting the pumpkin back together.
Fleet Mechanic
Joined: Jul 2010
Posts: 1,753
Likes: 34
From: Los Angeles, Ca.
My only two experiences with R&P breakage were with sandrails, but same basic concept. In both cases we were just cruising along when the noise started. It's very unlikely that they broke while cruising, it just went unnoticed at the moment that it happened.