International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > General FSJ Discussion

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 03-13-2014, 11:40 AM
SkylinePCG's Avatar
SkylinePCG SkylinePCG is offline
258 I6
 
Join Date: Jan 11, 2005
Location: Long Island, NY
Posts: 263
Drilling/Tapping pinion yoke threads?

Not specifically related to the jeep, but theres guys here way smarter than me at this...

While trying to sort out a leaking pinion seal in the rear axle of a 97 Chevy truck, I broke 3 of the 4 u-joint strap bolts. Half of each of them are seized inside the pinion yoke. I tried an "easy-out" and broke a drill bit off inside one, and I was doubtful about that method to begin with.

Used ones arent removed from the axles (at least not around here), so none of the salvage yards around here have them.

Before I pony up $100 for a new yoke to finish off my $5 seal replacement, is it worthwhile drilling out the broken bolts, and then tapping new threads into the yoke? Or am I going to run into metal-strength issues trying to cut into the yoke and just waste more time?

For now the entire driveshaft is out, theres a "diaper" on the transmissions tailshaft, and a drain pan under the rear end. It looks pretty sad hobbling around in FWD.
__________________
1980 Cherokee WT

360, 727, 219, 35s
Holley 4bbl, Edelbrock performer intake/cam, TFI, Hedman LT headers, HB brakes, aaaand GW seats!

Still on the shelf... Hamilton EFI, Transgo TF-2...
Reply With Quote
  #2  
Old 03-13-2014, 01:39 PM
threepiece threepiece is offline
350 Buick
 
Join Date: Sep 17, 2005
Location: Farmington Hills Mi.
Posts: 1,198
Fixturing the yoke on a machine that can hold the spindle on center of the broken bolts is the only way I would attempt such a repair. I think you will likely compromise the yoke by drilling out the bolt with a hand drill. Unfortunately, without the benefit of having free access to such a machine, the cost in having it done might come close to a new part.

I would not be comfortable adding much heat to a yoke until I was sure that it is not heat treated.
__________________
FSJ Hybrid build thread: http://www.shopfloortalk.com/forums/...ad.php?t=43332
We are Borg, but we don't know it yet.
We are being assimilated but we don't know it yet.
Resistance is not futile yet.
Are you and your children connected yet?
Reply With Quote
  #3  
Old 03-13-2014, 02:15 PM
FSJ-Earl's Avatar
FSJ-Earl FSJ-Earl is offline
304 AMC
 
Join Date: May 02, 2003
Location: Middletown, PA
Posts: 1,574
I would drill them out and use U-bolts instead of the bolts and straps. I have done this to several rigs and have had no strength issues at all. I did this on my 94 XJ that is locked front and rear with 34 Swampers and I have twisted driveshafts and not broken a yoke or a u bolt.
__________________
FSJ-Earl
2002 F350 Diesel - tow rig / family hauler
2008 4 door JK Rubicon - Wife's Daily Driver
1989 GW - the one that started it all
1983 - J15 - J10 body + J20 running gear = J15 Trail rig
Reply With Quote
  #4  
Old 03-13-2014, 02:54 PM
Carnuck's Avatar
Carnuck Carnuck is offline
 
Join Date: Feb 12, 2011
Location: Gold Bar, WA
Posts: 6,361
What Earl said is the same as I've done.
__________________
Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental.
Reply With Quote
  #5  
Old 03-13-2014, 04:17 PM
joe joe is offline
 
Join Date: Apr 28, 2000
Location: PNWet, USA
Posts: 22,376
I think plan A was good but went off the rails trying to do it with a portable drill motor. The yoke needs to be mounted firmly and drilled out squarely with a drill press or milling machine. Takes a lot of experience to hand drill out a broken bolt by eye or you do exactly what you did...break the drill bit off or worse the EZOut. If you can still grab the stub of the bit and remove it you're still in the game to do Plan A correctly. If it's broken off flush, then that pooch has been screwed. There are shops in a lot cities that can electrically burn out the bolt/drill bit. Don't know what the process is called but it's doable if avail in your town. We had a rural welding shop that did it. Not inexpensive but for a rare or expensive piece worth it. Once the bolt is out have the holes drilled and tapped "correctly". Though used yokes may not be readily avail in NYC they are out there elsewhere. Sometimes ya just gotta admit to yourself: ok fair plan, bad execution that I wasn't able to pull off and just step back and punt. Yeah nobody wants to spend an extra $100 they didn't want to, but you reach a point where it becomes moot and ya just gotta get help and/or free up more bucks.
__________________
joe
"Don't mind me. I'm just here for the alibi"
Reply With Quote
  #6  
Old 03-13-2014, 10:50 PM
SkylinePCG's Avatar
SkylinePCG SkylinePCG is offline
258 I6
 
Join Date: Jan 11, 2005
Location: Long Island, NY
Posts: 263
Well guys you're saying about what I was concerned with. In the grand scheme of things, $100 or so to keep a truck on the road is peanuts. She requires a little work once in a while but it's way less than a grand a year.

Regarding the u-bolt idea though, I always looked at the u-joint straps as an engineered "weak link." Reinforcing them I feel like would make the driveshaft a new weak link, and it'd be more $$ to fix, no?
__________________
1980 Cherokee WT

360, 727, 219, 35s
Holley 4bbl, Edelbrock performer intake/cam, TFI, Hedman LT headers, HB brakes, aaaand GW seats!

Still on the shelf... Hamilton EFI, Transgo TF-2...
Reply With Quote
  #7  
Old 03-14-2014, 04:03 AM
FSJ-Earl's Avatar
FSJ-Earl FSJ-Earl is offline
304 AMC
 
Join Date: May 02, 2003
Location: Middletown, PA
Posts: 1,574
Depends what you are doing with your rig. I have drilled a dozen plus yokes, laying on my back or side under my jeep, replaced them with u-bolts and have never once had an issue with anything related to that quick, simple, easy, cheap mod / upgrade. Some people put to much thought into these things. You are only going up by a few 16ths of an inch so it is not like you are taking out a 1/2 inch of material.
__________________
FSJ-Earl
2002 F350 Diesel - tow rig / family hauler
2008 4 door JK Rubicon - Wife's Daily Driver
1989 GW - the one that started it all
1983 - J15 - J10 body + J20 running gear = J15 Trail rig
Reply With Quote
  #8  
Old 03-18-2014, 05:34 AM
threepiece threepiece is offline
350 Buick
 
Join Date: Sep 17, 2005
Location: Farmington Hills Mi.
Posts: 1,198
Quote:
Originally Posted by joe
. The yoke needs to be mounted firmly and drilled out squarely with a drill press or milling machine.
Don't forget the lathe. There are at least three different ways I can think of to set up a yoke for drilling on a lathe.
__________________
FSJ Hybrid build thread: http://www.shopfloortalk.com/forums/...ad.php?t=43332
We are Borg, but we don't know it yet.
We are being assimilated but we don't know it yet.
Resistance is not futile yet.
Are you and your children connected yet?
Reply With Quote
  #9  
Old 03-18-2014, 05:56 AM
mokurt mokurt is offline
Grease Monkey
 
Join Date: Feb 23, 2014
Location: Hollister,Ca
Posts: 431
You will be better off buying a new U-Bolt yoke.

How was the seal surface on the old yoke,any grooves?
Reply With Quote
  #10  
Old 03-18-2014, 08:03 AM
SkylinePCG's Avatar
SkylinePCG SkylinePCG is offline
258 I6
 
Join Date: Jan 11, 2005
Location: Long Island, NY
Posts: 263
Yeah I ended up finding a new one on rock auto for $60. It's just a street driven commuter truck, and with over 255k miles on it, I don't have any reason not to replace it with stock stuff.

I think I could have made the old one work, and on the jeep I probably would have, but this one I just wanted the straightest line to getting back on the road.
__________________
1980 Cherokee WT

360, 727, 219, 35s
Holley 4bbl, Edelbrock performer intake/cam, TFI, Hedman LT headers, HB brakes, aaaand GW seats!

Still on the shelf... Hamilton EFI, Transgo TF-2...
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
pinion yoke replacement the jeep General FSJ Tech 2 03-31-2008 06:00 PM
14Bolt Pinion Yoke onesunJ10 Off-Road FSJ Tech 1 12-16-2006 06:09 AM
pinion yoke imported_89Wag_TheBeast Off-Road FSJ Tech 5 11-01-2004 11:21 AM
AMC 20 pinion yoke nut TooTall General FSJ Tech 3 09-16-2004 05:55 PM
pinion yoke question incocknito General FSJ Tech 3 02-23-2003 10:55 AM


All times are GMT -6. The time now is 10:56 AM.


Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
corner corner