Driveline/ Pinion angle help!
Thread Starter
|
5th Wheeling
Joined: Mar 2022
Posts: 37
Likes: 7
Driveline/ Pinion angle help!
Can someone with a single cab long bed take some driveline and pinion angles for me?
I've got a 95 f250 with 460.
Ever since I've lifted my truck I've had deceleration vibrations 60+ mph.
I've had to install a 4° shim "backwards." Large side of wedge towards front, to get my pinion angles to match, but still having issues.
I'm about ready to take the lift off at this point lol...
It's lifted with full leafs and not a block.
I've replaced u joints and will be balancing the driveshaft also.
Also open to recommendations!
Thanks
I've got a 95 f250 with 460.
Ever since I've lifted my truck I've had deceleration vibrations 60+ mph.
I've had to install a 4° shim "backwards." Large side of wedge towards front, to get my pinion angles to match, but still having issues.
I'm about ready to take the lift off at this point lol...
It's lifted with full leafs and not a block.
I've replaced u joints and will be balancing the driveshaft also.
Also open to recommendations!
Thanks
Thread Starter
|
5th Wheeling
Joined: Mar 2022
Posts: 37
Likes: 7
So unless I'm really missing something, there's no way to 'unphase or phase'
Logistics Pro
Joined: Dec 2003
Posts: 3,783
Likes: 878
From: Foothills of NC
Sitting on level ground, what are the angles in degrees on the tail shaft yoke and differential yoke, and the incline angle of the driveshaft?
The differential yoke should be around 2-3 deg less than the tail shaft angle to allow for acceleration wrap. It sounds like the diff yoke may be down too much.
The differential yoke should be around 2-3 deg less than the tail shaft angle to allow for acceleration wrap. It sounds like the diff yoke may be down too much.
Cargo Master
Joined: Nov 2009
Posts: 2,190
Likes: 620
No, on a 1pc driveshaft, it's not an issue, I wasn't sure if the 8' Single Cab trucks were using a 1 Pc shaft or not.
Thread Starter
|
5th Wheeling
Joined: Mar 2022
Posts: 37
Likes: 7
Sitting on level ground, what are the angles in degrees on the tail shaft yoke and differential yoke, and the incline angle of the driveshaft?
The differential yoke should be around 2-3 deg less than the tail shaft angle to allow for acceleration wrap. It sounds like the diff yoke may be down too much.
The differential yoke should be around 2-3 deg less than the tail shaft angle to allow for acceleration wrap. It sounds like the diff yoke may be down too much.
Transfer case is 4.1° down, diff is 2.6° up.
Driveline 12 degrees
To add, ive tried 2, 4, and 8 degree shims so far.
4 is the quietest it's been.
Logistics Pro
Joined: Aug 2014
Posts: 3,574
Likes: 856
...and the incline angle of the driveshaft?
Trending Topics
Thread Starter
|
5th Wheeling
Joined: Mar 2022
Posts: 37
Likes: 7
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / Worst Features Of The 2025+ Ford Expedition
Brett Foote
10 Ways Ford is LOSING to the Competition
Joe Kucinski
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
Thread Starter
|
5th Wheeling
Joined: Mar 2022
Posts: 37
Likes: 7
Don't the pinion and transfer case need to be as close to parallel as possible?
I haven't measured every time, but trying from zero-8° shims, zero and 8 we're by far the worst. Zero would have brought the pinion angle up even more, I'm guessing a 10ish degree angle. The 8 degree shims brought it to a 1 degree angle.
That's why I'm looking for some angles from someone's truck...
Maybe I need to invest in a new driveline with CV joint if I want to keep the lift?
More Turbo
Joined: Dec 2021
Posts: 554
Likes: 186
Yeah no, not on a non-CV driveline. He's got like 8 degrees compound angle at the T-case and 9.4 at the axle, that's well within the U-joints acceptable working angles. Additionally his difference of 1.4 degrees between the t-case and pinion angles is IIRC darn near perfect according to Dana's manual. He should absolutely NOT tilt his diff up to 9-10 degrees as under load that will put his pinion inline with the driveshaft while still leaving the t-case's single U-joint at about 7 degrees compound angle, now that will defo make things vibrate at high speed.
Thread Starter
|
5th Wheeling
Joined: Mar 2022
Posts: 37
Likes: 7
4 inches with new leaf pack.
I'm going to try another set of u joints, even though these are new....and get the driveline balanced.
I'm going to try another set of u joints, even though these are new....and get the driveline balanced.
More Turbo
Joined: Dec 2021
Posts: 554
Likes: 186
4" is pretty standard tbh, you shouldn't be having these issues at such relatively low altitude.
Didn't you already have your driveshaft balanced tho? Also what brand were the new U-joints? I've had nothing but trouble with MOOGs for instance their retaining clips have always been a tad too thick and too install them as is would take forcing the cups so hard against the cross it would try to lock up the whole joint. Exactky zero issues with any and all Spicers tho.
Didn't you already have your driveshaft balanced tho? Also what brand were the new U-joints? I've had nothing but trouble with MOOGs for instance their retaining clips have always been a tad too thick and too install them as is would take forcing the cups so hard against the cross it would try to lock up the whole joint. Exactky zero issues with any and all Spicers tho.
Thread Starter
|
5th Wheeling
Joined: Mar 2022
Posts: 37
Likes: 7
4" is pretty standard tbh, you shouldn't be having these issues at such relatively low altitude.
Didn't you already have your driveshaft balanced tho? Also what brand were the new U-joints? I've had nothing but trouble with MOOGs for instance their retaining clips have always been a tad too thick and too install them as is would take forcing the cups so hard against the cross it would try to lock up the whole joint. Exactky zero issues with any and all Spicers tho.
Didn't you already have your driveshaft balanced tho? Also what brand were the new U-joints? I've had nothing but trouble with MOOGs for instance their retaining clips have always been a tad too thick and too install them as is would take forcing the cups so hard against the cross it would try to lock up the whole joint. Exactky zero issues with any and all Spicers tho.
I installed spicer joints. I dropped one of the cups and had to manually reinstall all the needle bearings during install. Figure I'll just get a new one.