Pinion Depth - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-19-2013, 07:09 PM   #1
Jeeper
 
Join Date: Oct 2011
Location: Belo Horizonte - Brazil
Posts: 22
Hy,


I`m re-gearing my TJ to 4.10 to run with 33".

I found an issue to assembly my front axle, I can`t found the correct pinion depth, may somebody help me?

Attached the pics that took from the pinions, could you explain me how I can get the depth with the numbers on it?

Tks...

Click image for larger version

Name:	image-1811714295.jpg
Views:	109
Size:	119.3 KB
ID:	601265

Click image for larger version

Name:	image-3366356247.jpg
Views:	105
Size:	125.3 KB
ID:	601273

Filipi is offline   Quote
Old 12-19-2013, 07:48 PM   #2
Supporting Member

WF Supporting Member
 
jeepwayoflife's Avatar
 
Join Date: Nov 2011
Location: California/Montana
Posts: 3,194
You have all the tools you need to do a regear, right? Its not normally something people do at home without experience with gears, but some do. It normally just takes lots of time. Sorry I can't help on the depth question but I'm sure someone will know.

__________________
--------------------------------------------------------
jeepwayoflife is offline   Quote
Old 12-19-2013, 07:52 PM   #3
Supporting Member

WF Supporting Member
 
Water Dog's Avatar
 
Join Date: Mar 2011
Location: Roseville, CA
Posts: 7,705
Images: 11
__________________
Dennis
Water Dog is offline   Quote
Old 12-20-2013, 09:48 AM   #4
Jeeper
 
hosejockey61's Avatar
 
Join Date: Oct 2012
Location: Aurora, CO
Posts: 2,150
What shim thickness did you pull out of the axle? Measure those shims and use that number as a starting point.

If you already tossed them, then start with .070

ECGS gave me that number when I did mine and I ended up at .071
hosejockey61 is offline   Quote
Old 12-23-2013, 09:08 AM   #5
Jeeper
 
Join Date: Oct 2011
Location: Belo Horizonte - Brazil
Posts: 22
Quote:
Originally Posted by hosejockey61 View Post
What shim thickness did you pull out of the axle? Measure those shims and use that number as a starting point.

If you already tossed them, then start with .070

ECGS gave me that number when I did mine and I ended up at .071

In fact the mechanic removed the old one and installed again at the same way, because he could not install the new one.
How did you measure the depth of R&P? Did you do any math with the numbers at the top of Ring?

I've tried to find some info on the web but all intallation manuals that I found says the same about some numbers typed at the Pinion, it should be like +3, +2....., It says that I have to get this numbers and look in a table to get the depth of the new one, the old Ring & Pinion really has this numbers typed, but the new one not. Do you know what does means the numbers typed at the pics?

Sorry guys for my poor English and very thanks for your help.....we are talk in a tech terms and English is not my native language.

Tks,

Filipi
Filipi is offline   Quote
Old 12-23-2013, 02:21 PM   #6
Jeeper
 
hosejockey61's Avatar
 
Join Date: Oct 2012
Location: Aurora, CO
Posts: 2,150
I was expecting to find the same +1 or +2 type numbers there but mine looked very similar to yours...



Don't worry about that though. For a HP30, just start at .070.

Just start with a shim stack that is .070 thick. Make sure your baffle is in place too. Put the pinion in place, the rear bearing, and the slinger. Don't worry about shims on the back side just yet. You will determine those during final setup. Tighten the old pinion nut to about 15-20 in/lbs. The put in your carrier with shims. Get your backlash to .006-.010, preferably .008. Then mark your gears up and take a reading. Adjust accordingly.
hosejockey61 is offline   Quote
Old 01-06-2014, 09:53 AM   #7
Jeeper
 
Join Date: Oct 2011
Location: Belo Horizonte - Brazil
Posts: 22
Hi Jeepers,

I finally got the R&P installed...what I need now is an other litte help from you....the speed indicated is quite higher than real one, in fact it is expected once I changed the gears... Can you please remember me the name of the part that I need to buy to normalize this?

Tks...
Filipi is offline   Quote
Old 01-06-2014, 11:18 AM   #8
Supporting Member

WF Supporting Member
 
jeepwayoflife's Avatar
 
Join Date: Nov 2011
Location: California/Montana
Posts: 3,194
Quote:
Originally Posted by Filipi View Post
Hi Jeepers,

I finally got the R&P installed...what I need now is an other litte help from you....the speed indicated is quite higher than real one, in fact it is expected once I changed the gears... Can you please remember me the name of the part that I need to buy to normalize this?

Tks...

If its not a Rubicon you need a new speedometer gear. If its a Rubicon you need one of those electronic programmers to change the tire size setting.
__________________
--------------------------------------------------------
jeepwayoflife is offline   Quote
Old 01-06-2014, 11:22 AM   #9
Supporting Member

WF Supporting Member
 
Water Dog's Avatar
 
Join Date: Mar 2011
Location: Roseville, CA
Posts: 7,705
Images: 11
Quote:
Originally Posted by Filipi View Post
Hi Jeepers,

I finally got the R&P installed...what I need now is an other litte help from you....the speed indicated is quite higher than real one, in fact it is expected once I changed the gears... Can you please remember me the name of the part that I need to buy to normalize this?

Tks...
Speedometer gear...here you go:

Changing Your Jeep Speedometer Gear

Search Results - Quadratec
__________________
Dennis
Water Dog is offline   Quote
Old 01-06-2014, 03:08 PM   #10
Jeeper
 
hosejockey61's Avatar
 
Join Date: Oct 2012
Location: Aurora, CO
Posts: 2,150
Quote:
Originally Posted by Filipi View Post
Hi Jeepers,

I finally got the R&P installed...
Did your installer give you the shim measurements by chance? Just curious...
hosejockey61 is offline   Quote
Old 01-10-2014, 12:51 PM   #11
Jeeper
 
Join Date: Oct 2011
Location: Belo Horizonte - Brazil
Posts: 22
Quote:
Originally Posted by Water Dog View Post
Perfect...it's what I need....
Very tks....
Filipi is offline   Quote
Old 01-10-2014, 01:00 PM   #12
Jeeper
 
Join Date: Oct 2011
Location: Belo Horizonte - Brazil
Posts: 22
Quote:
Originally Posted by hosejockey61 View Post

Did your installer give you the shim measurements by chance? Just curious...
No, I've found some instructions on web from the R&P supllier explaining how to procceed to find the correct shim measurements and what does means the numbers wrote at the top of the Pinion...and "voialą" it's working....

Tks guys...without your support I would spend much more time for sure .
Filipi is offline   Quote
Old 01-10-2014, 01:24 PM   #13
Jeeper
 
freeskier's Avatar
 
Join Date: Mar 2011
Location: Longmont, CO
Posts: 2,743
In the first picture the 2247 is what you want. It's actually 2.247 and is the pinion depth for that particular pinion. If you can find out what the nominal pinion depth is some simple math with tell you what the difference is. This still only helps if you know the shim size for the old set up.
__________________
CU Boulder Aerospace Engineering
freeskier is offline   Quote
Old 01-10-2014, 01:26 PM   #14
Jeeper
 
freeskier's Avatar
 
Join Date: Mar 2011
Location: Longmont, CO
Posts: 2,743
Quote:
Originally Posted by hosejockey61 View Post
I was expecting to find the same +1 or +2 type numbers there but mine looked very similar to yours...


Don't worry about that though. For a HP30, just start at .070.

Just start with a shim stack that is .070 thick. Make sure your baffle is in place too. Put the pinion in place, the rear bearing, and the slinger. Don't worry about shims on the back side just yet. You will determine those during final setup. Tighten the old pinion nut to about 15-20 in/lbs. The put in your carrier with shims. Get your backlash to .006-.010, preferably .008. Then mark your gears up and take a reading. Adjust accordingly.
Like I said for the OP 2.261 is your the pinion depth. Figure out what the nominal depth is and the difference is you + or - number.
__________________
CU Boulder Aerospace Engineering
freeskier is offline   Quote
Old 01-10-2014, 03:39 PM   #15
Jeeper
 
hosejockey61's Avatar
 
Join Date: Oct 2012
Location: Aurora, CO
Posts: 2,150
Quote:
Originally Posted by freeskier View Post
Like I said for the OP 2.261 is your the pinion depth. Figure out what the nominal depth is and the difference is you + or - number.
I searched like crazy and even asked ECGS and couldn't find a NPD. It was pretty cool that they just told me to start at .070 and I ended up at .071...pretty damn close!
hosejockey61 is offline   Quote
Old 01-10-2014, 11:02 PM   #16
Jeeper
 
freeskier's Avatar
 
Join Date: Mar 2011
Location: Longmont, CO
Posts: 2,743
Quote:
Originally Posted by hosejockey61 View Post
I searched like crazy and even asked ECGS and couldn't find a NPD. It was pretty cool that they just told me to start at .070 and I ended up at .071...pretty damn close!
Yeah, this is unfortunately what I ran into as well. Couldn't find solid numbers for nominal depth. Even if you found something you'd still have to be pretty lucky for it to be perfect using the numbers. Frankly I don't think your going to save a lot of time. Plus your not really going to learn a whole lot if you get it perfect first try. I spent weeks on the 8.8 going nice and slow, taking my time, but I knocked the HPD30 out in a matter of hours.
__________________
CU Boulder Aerospace Engineering
freeskier is offline   Quote
Old 01-11-2014, 11:55 AM   #17
Jeeper
 
hosejockey61's Avatar
 
Join Date: Oct 2012
Location: Aurora, CO
Posts: 2,150
Quote:
Originally Posted by freeskier View Post
Yeah, this is unfortunately what I ran into as well. Couldn't find solid numbers for nominal depth. Even if you found something you'd still have to be pretty lucky for it to be perfect using the numbers. Frankly I don't think your going to save a lot of time. Plus your not really going to learn a whole lot if you get it perfect first try. I spent weeks on the 8.8 going nice and slow, taking my time, but I knocked the HPD30 out in a matter of hours.
Mudb8 mentioned on JF how he has a list of starting points for certain axles. I learned a lot from his input and will most certainly look him up in the future if I run into any snags. The billavista article is top notch but the problem I ran into that was that it was TOO detailed as far as gear changes are concerned. It is still a GREAT reference to follow though.

hosejockey61 is offline   Quote
Reply

Thread Tools

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 Off
Pingbacks are Off
Refbacks are Off




Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 06:04 AM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC