Dana 30/AMC 20 axle lengths - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Dana 30/AMC 20 axle lengths

Engo winches available at www.rockridge4wd.com! Free shippJeep speedometer gears at rockridge4wdDana 30 Truss for your TJ, LJ, ZJ, and XJ

Reply
Unread 02-17-2011, 07:53 AM   #1
PlowJeepCJ5
Registered User
1983 CJ5 
 
Join Date: Feb 2011
Location: West Salem, OH
Posts: 8
Dana 30/AMC 20 axle lengths

Hello all,

I am new to the forum and am also new to my CJ5. I look forward to being part of the community.

My question today is: Is the Dana 30 front axle slightly shorter in length than the AMC 20 rear? Those are the axles that I believe that I have and I just noticed the other day that my rear tires have a slightly wider stance than my front tires.

The reason that I am inquiring is that the mount for my snowplow is such that I cannot fully turn to the right without rubbing my left front tire on the left side of the mount.

I am thinking about mounting wheel spacers up front to help move the tires a little away from the mount but I wanted to see if my front axle was in fact shorter than my rear.

Thanks!

Nate

PlowJeepCJ5 is offline   Reply With Quote
Unread 02-17-2011, 08:14 AM   #2
CSP
Registered User
 
Join Date: Aug 2002
Location: Colorado
Posts: 12,080
It's actually the opposite. The front should be wider. Someone may have installed a wide track AMC20 though, but it would still be about an inch narrower than your front axle.

The narrow track axle widths (all CJ5's had narrow track) are 54.5" for the front and 50.5" for the rear. These measurements are wheel mount surface (WMS) to WMS.
CSP is offline   Reply With Quote
Unread 02-17-2011, 08:17 AM   #3
BriansCJ
Registered User
1994 XJ Cherokee 
 
Join Date: Dec 2008
Location: South Jersey
Posts: 3,958
Quote:
Originally Posted by CSP View Post
It's actually the opposite. The front should be wider. Someone may have installed a wide track AMC20 though, but it would still be about an inch narrower than your front axle.

The narrow track axle widths (all CJ5's had narrow track) are 54.5" for the front and 50.5" for the rear. These measurements are wheel mount surface (WMS) to WMS.
I though narrow tracs were 50.5" Front and rear and Wide tracks were 54.5" front and rear.

I guess I'll go measure my '5 in a little bit.
__________________
5 Speed XJ Build - Daily Driver & Weekend Wheeler
1978 CJ5 Resto, w/ heavy mods - Slow
BriansCJ is offline   Reply With Quote
Unread 02-17-2011, 08:26 AM   #4
CSP
Registered User
 
Join Date: Aug 2002
Location: Colorado
Posts: 12,080
No, fronts are wider in CJ's. 100% positive of that.

When YJs, XJs, TJs etc came out the fronts and rears became the same width.
CSP is offline   Reply With Quote
Unread 02-17-2011, 08:31 AM   #5
PlowJeepCJ5
Registered User
1983 CJ5 
 
Join Date: Feb 2011
Location: West Salem, OH
Posts: 8
I will measure later and report on the results. I sure do wish they were reversed because my turning radius, especially with my snowplow mount issue, is very poor. I have to three point most turns to the right. To the left is not as bad.
PlowJeepCJ5 is offline   Reply With Quote
Unread 02-17-2011, 08:34 AM   #6
BriansCJ
Registered User
1994 XJ Cherokee 
 
Join Date: Dec 2008
Location: South Jersey
Posts: 3,958
Quote:
Originally Posted by CSP View Post
No, fronts are wider in CJ's. 100% positive of that.

When YJs, XJs, TJs etc came out the fronts and rears became the same width.
No argument.

I was just going by the list in this thread.

http://www.jeepforum.com/forum/f8/wi...rments-751574/
__________________
5 Speed XJ Build - Daily Driver & Weekend Wheeler
1978 CJ5 Resto, w/ heavy mods - Slow
BriansCJ is offline   Reply With Quote
Unread 02-17-2011, 09:11 AM   #7
PlowJeepCJ5
Registered User
1983 CJ5 
 
Join Date: Feb 2011
Location: West Salem, OH
Posts: 8
CSP, Where exactly on the tire do I go to measure the WMS? Thanks.
PlowJeepCJ5 is offline   Reply With Quote
Unread 02-17-2011, 09:54 AM   #8
CSP
Registered User
 
Join Date: Aug 2002
Location: Colorado
Posts: 12,080
WMS is wheel mounting surface aka where the back of the wheel makes contact when you bolt the wheel/tire to the axle. It's the area around the lug studs, not the tire.
CSP is offline   Reply With Quote
Unread 02-17-2011, 10:03 AM   #9
PlowJeepCJ5
Registered User
1983 CJ5 
 
Join Date: Feb 2011
Location: West Salem, OH
Posts: 8
Ok, thank you. I will take the measurements and report back. I may be wrong in my assumptions of which axles I am running with. I am just getting started and assumed that they were the stock axles. It sounds to me like someone has made a switch somewhere down the line (as is the case with me having the AMC 304). I will dig into this further. Thanks for your help. ~Nate
PlowJeepCJ5 is offline   Reply With Quote
Unread 02-20-2011, 06:08 AM   #10
Trimble1
Registered User
1983 CJ5 
 
Join Date: Sep 2008
Location: Saint Clair, Michigan
Posts: 52
Have you measured the axle lengths yet? I'm just curious because I'm thinking of tearing apart my 83 CJ5 and I just measured my AMC 20 rear at 50" and my Dana 30 front at around 52". Does this sound right? Wide track on a CJ5? I thought everybody said only narrow on a 5, or are those numbers for a narrow track. Sorry didn't want to hijack the thread. Thanks in advance.

jim
__________________
'83 CJ5 4.2L D30 AMC20 D300
Stinking 2.73's 31" BFG's MC2100
Trimble1 is offline   Reply With Quote
Unread 02-20-2011, 06:58 AM   #11
BriansCJ
Registered User
1994 XJ Cherokee 
 
Join Date: Dec 2008
Location: South Jersey
Posts: 3,958
Quote:
Originally Posted by Trimble1 View Post
Have you measured the axle lengths yet? I'm just curious because I'm thinking of tearing apart my 83 CJ5 and I just measured my AMC 20 rear at 50" and my Dana 30 front at around 52". Does this sound right? Wide track on a CJ5? I thought everybody said only narrow on a 5, or are those numbers for a narrow track. Sorry didn't want to hijack the thread. Thanks in advance.

jim
Thos are a narrowtrack definitely.
__________________
5 Speed XJ Build - Daily Driver & Weekend Wheeler
1978 CJ5 Resto, w/ heavy mods - Slow
BriansCJ is offline   Reply With Quote
Unread 02-20-2011, 09:37 AM   #12
PlowJeepCJ5
Registered User
1983 CJ5 
 
Join Date: Feb 2011
Location: West Salem, OH
Posts: 8
Hi Jim, No I have not had a chance to measure yet. I'm out of town until tomorrow. I'll measure them as soon as I get back because I'm really looking forward to investigating exactly what I have. (On a side note, I am searching on the forum for someone that lives near me that is knowledgeable about these things to help me out.) -NB
PlowJeepCJ5 is offline   Reply With Quote
Unread 02-20-2011, 10:08 AM   #13
VACJ7
Hockey Rules!
 
VACJ7's Avatar
1984 CJ7 
 
Join Date: Jul 2008
Location: Northern Virginia
Posts: 3,781
Like CSP said, front axle will always be wider than the rear unless someone swapped it out.

Wide
56 front
54.5 rear

Narrow
53 front
50.5 rear
VACJ7 is offline   Reply With Quote
Unread 02-20-2011, 10:52 AM   #14
PlowJeepCJ5
Registered User
1983 CJ5 
 
Join Date: Feb 2011
Location: West Salem, OH
Posts: 8
Thanks, VACJ7. Those are exactly the numbers that I was looking for. I'll get the measurements in the next day or two and report back. I'm really interested in finding out what exactly I have.
PlowJeepCJ5 is offline   Reply With Quote
Unread 02-20-2011, 10:33 PM   #15
BriansCJ
Registered User
1994 XJ Cherokee 
 
Join Date: Dec 2008
Location: South Jersey
Posts: 3,958
I just picked up a set of widetracks.
Ill try to get some more accurate measurements tomorrow b/c I took these when it was dark.
Front 56
Rear 55.
__________________
5 Speed XJ Build - Daily Driver & Weekend Wheeler
1978 CJ5 Resto, w/ heavy mods - Slow
BriansCJ is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.