Extreme Terrain
4x4Wire Trail Talk Forums: Jeep, Toyota, Mitsubishi, Pajero, Isuzu, Kia, 4WD, 4x4, SUV, Off-Road and OutdoorWire Forums


Search

Recent Posts on TrailTalk
Looking for 2nd row seats in my 1989 Mitsubishi Pa
by Brookyntero - 05/29/20 02:09 PM
'95 Montero 3.5L Coil Blowing
by Rick1013 - 05/28/20 12:45 AM
2003 montero sport worth it?
by MarkG - 05/27/20 05:07 PM
1989 Mitsu Pajero/Dodge Raider for sale
by redpajero1989 - 05/24/20 12:30 AM
suzi the psychic
by rascott - 05/22/20 07:50 PM
WTB Arb 3434010 Gen I bar
by Brookyntero - 05/20/20 05:18 PM
Montero Compass Wiring
by kela - 05/15/20 01:35 PM
Support 4x4Wire
New Topics on TrailTalk
'95 Montero 3.5L Coil Blowing
by Rick1013 - 05/28/20 12:45 AM
Looking for 2nd row seats in my 1989 Mitsubishi Pa
by tiscud75 - 05/26/20 06:06 PM
2003 montero sport worth it?
by BC4x4 - 05/23/20 11:34 PM
WTB Arb 3434010 Gen I bar
by Brookyntero - 05/20/20 05:18 PM
amigo 2.6 coil
by jee - 05/19/20 06:01 PM
WTB - Montero Bouncy Seat
by Brookyntero - 05/11/20 08:27 PM
4x4 Gallery
Photos of rig
Attila
99 Monterrible Sport
Scar the Cylon Raider
Mercenary Sergeant: Code Name "Sapphire"
More News on the 'Wire

4x4Voice
4x4Wire
MUIRNet-News
OutdoorWire
Who's Online Now
0 registered members (), 176 guests, and 6 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums37
Topics138,114
Posts1,080,622
Members15,064
Most Online907
Dec 28th, 2019
Previous Thread
Next Thread
Print Thread
Rate Thread
R&P Contact Pattern #1104250 03/15/18 01:14 PM
Joined: Apr 2007
Posts: 29
J
JeeperDan Offline OP
Getting the Wheeling Fever
Hi all,

Looking for a little help on a project I have underway. I have an '81 CJ with '78 Scout II D44 axles and I'm in the process of installing a Eaton/Detriot TrueTrac carrier. I've never done gear setup before and I'm having trouble interpreting the contact patterns. Hoping someone can provide an opinion on what I need to do to get it right.

Some background - I am using the same ring and pinion as they were in great shape. I used new shims on the pinion of the same size as the old stack (old ones were damaged on the way out). I installed the pinion, set the preload, installed the carrier and shimmed to .005-.006" backlash. I applied the marking compound and turned the pinion applying drag on the ring gear. My challenge is that I don't really get ovals of contact as described in most guidance, but rather lines all the way across the gear tooth. The pattern seems a bit too far towards the flank, so maybe I need to remove pinion shims, but it seems odd that I'd have to change that with the same gear set.

I attached a couple pictures of what I've got now. I appreciate any knowledge you can provide.

Dan

Attached Files
Drive-1.PNG (644.53 KB, 4 downloads)
Coast-1.PNG (632.25 KB, 3 downloads)
From the Off-Road World
Re: R&P Contact Pattern [Re: JeeperDan] #1104251 03/15/18 06:58 PM
Joined: Feb 2000
Posts: 6,221
4x4Wire Offline
Trail Leader
***
see: http://www.sierragear.com/ring-and-pinion-gear-pattern/

I have a document I will post a link to....

Re: R&P Contact Pattern [Re: JeeperDan] #1104252 03/15/18 06:59 PM
Joined: Feb 2000
Posts: 6,221
4x4Wire Offline
Trail Leader
***

Re: R&P Contact Pattern [Re: JeeperDan] #1104253 03/15/18 07:18 PM
Joined: Apr 2007
Posts: 29
J
JeeperDan Offline OP
Getting the Wheeling Fever
Hi John,

Thanks for the references. I appreciate it. I have found these on the internet and reviewed, but I'm just having a hard time interpreting my results. Probably just need to make some adjustments until I start to see it more clearly. I found a couple of other strands suggesting that a thick line across the flank suggests that the pinion is too close. I'll try that tonight.

Thanks again,

Dan

Re: R&P Contact Pattern [Re: JeeperDan] #1104254 03/15/18 07:50 PM
Joined: Feb 2000
Posts: 6,221
4x4Wire Offline
Trail Leader
***
I recall some discussion or 4x4wire article about this.

There is a Toyota article: http://4x4wire.com/toyota/tech/gear_setup/

I tend to follow the "pinion too close" argument. It has been more than 15 years since I have messed with gears....

Re: R&P Contact Pattern [Re: 4x4Wire] #1104271 03/30/18 04:33 AM
Joined: Apr 2007
Posts: 29
J
JeeperDan Offline OP
Getting the Wheeling Fever
So... its been a while since I posted, but I've tired a lot of combinations since then. If anyone is looking to do this project, I suggest buying your supplies from Yukon gear and axle. I purchased two shim kits that had nearly no variety between the 5 pinion shims that were provided. Just received my Yukon shim stack tonight and was very pleased with the quantity, variety and quality.

After trying lots of different combinations of pinion and carrier shims, I've found that I cannot get the drive side pattern and the coast side pattern to converge on the center of the ring gear tooth (between the heel and toe) without causing the pinion to be too deep. Since most articles, including the one that John shared suggest that centering the pattern between heel and toe is not critical and often unattainable, I decided to stop chasing that aspect of the pattern. I worked back toward the size of the original shim pack and reached a point where the pattern appears fairly centered from face to flank (see pictures).

Hoping to get some opinions on whether this pattern has any obvious flaws. Looks to me like maybe .005 less on the pinion shim to be fully centered from face to flank. Any common (or uncommon) mistakes that prevent getting a pattern centered between the heel and toe? If this was your rig, would you give this pattern a shot or keep working it?

Thanks,

Dan

Attached Files
Coast1.PNG (568.76 KB, 1 downloads)
Drive1.PNG (491.33 KB, 1 downloads)

Moderated by  4x4Wire, Mike Bondi 







4x4Wire Social:

| 4x4Wire on FaceBook |


OutdoorWire, 4x4Wire, JeepWire, TrailTalk, MUIRNet-News, and 4x4Voice are all trademarks and publications of OutdoorWire, Inc. and MUIRNet Consulting.
Copyright (c) 1999-2019 OutdoorWire, Inc and MUIRNet Consulting - All Rights Reserved, no part of this publication may be reproduced in any form without express written permission
You may link freely to this site, but no further use is allowed without the express written permission of the owner of this material.
All corporate trademarks are the property of their respective owners.

Powered by UBB.threads™ PHP Forum Software 7.7.3
(Release build 20190728)
PHP: 7.2.30 Page Time: 0.029s Queries: 17 (0.009s) Memory: 2.8491 MB (Peak: 3.1636 MB) Data Comp: Off Server Time: 2020-05-29 21:20:59 UTC
Valid HTML 5 and Valid CSS