1986 v6 4x4

[halnelmar]

does anyone know the axle ratio for this truck? cannot find the info for the v6 anywhere

[Green Mesa XJ]

1984-85 v6 5 speed 4x4 had 3.73. Not sure if it continued in to 1986 when Chrysler started to become a factor. I think it may have been 3.55 in 1986 for the v6, and 4.10 for the 4cyl


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[Pete M]

it could be anything.  they hadn't yet standardized the ratios for each drivetrain combo.  easiest way is to jack up one rear tire, put it in neutral, and spin the tire around exactly twice while counting the number of times the driveshaft spins.  3 and a half is 3.55, a tic over 4 is 4.10, etc.   

[dasbulliwagen]

My 86 V6 4x4 with a 5 speed had 4:10's. Those axles and trans got put into my 87. I also have an 86 XJ Waggy V6 4x4 NP229 auto, but I don't know what gears are in it yet.

[Eagle]

I have a hulk of an '86 XJ V6 auto. It has 3.73 gears.

[DirtyComanche]

I'd look for the tag(s), or spin it as Pete suggested.

[coheed]

My 86 2.8 904 Np228 has 4.10's.

[yxmj]

Why Guess.....drop the cover....read the stamped numbers....replace the cover and top up with new diff lube....that way you are 100% positive of what the ratio is ....and you gave the truck some new lube ( that was probably needed anyway)

[HOrnbrod]

20 minutes ago, yxmj said:

Why Guess.....drop the cover....read the stamped numbers....replace the cover and top up with new diff lube....that way you are 100% positive of what the ratio is ....and you gave the truck some new lube ( that was probably needed anyway)

 

Exactly.  And while you're in there check the condition of the R & P, check to see if it's Posi or not, etc. Good to know info. 

[omega_rugal]

is it a dana 35? what if you have a amc 20 

[Pete M]

if you are lucky to have an amc-20, they should be 4.10s

[zomeizter]

1 hour ago, Pete M said:

if you are lucky to have an amc-20, they should be 4.10s

Define lucky...

[Pete M]

well, 20 years ago some random guy stopped by the house one day while I was puttering with my MJ and asked if I wanted to buy his for a dirt cheap.    turned out to be a metric ton 86 with the AMC-20. 

[amsuco]

On November 24, 2018 at 8:47 PM, Pete M said:

well, 20 years ago some random guy stopped by the house one day while I was puttering with my MJ and asked if I wanted to buy his for a dirt cheap.    turned out to be a metric ton 86 with the AMC-20. 

 

I can't believe that this didn't generate a "you suck!" comment.  I mean...I know we're nice guys and all, but still.

 

[HOrnbrod]

Hey Pete - you suck. There - someone generated it. happy now?   

 

I searched HARD for years and years for an MJ AMC-20 rear so I could junk my POS c-clip D35 - couldn't find. I had to settle for an MJ D44 finally, but I still want an AMC-20 just because of it's uniqueness. And I'm still looking...

[Pete M]

26 minutes ago, amsuco said:

 

I can't believe that this didn't generate a "you suck!" comment.  I mean...I know we're nice guys and all, but still.

 

 

I was asked for the definition of lucky.    I don't deny it's happened to me now and again. 

[zomeizter]

19 hours ago, HOrnbrod said:

Hey Pete - you suck. There - someone generated it. happy now?   

 

I searched HARD for years and years for an MJ AMC-20 rear so I could junk my POS c-clip D35 - couldn't find. I had to settle for an MJ D44 finally, but I still want an AMC-20 just because of it's uniqueness. And I'm still looking...

 

19 hours ago, Pete M said:

 

I was asked for the definition of lucky.    I don't deny it's happened to me now and again. 

Ha! I thought the AMC 20 was a POS axle. Well, according to the internet...I will replace my 4.10 geared AMC 20 for an 8.8, so I think it will be up for grabs...

[Pete M]

the CJ version had 2-piece axles that liked to fail at the connections and that gives them a bad wrap.  MJs have one-piece shafts.   

[zomeizter]

So it's not a POS?

[HOrnbrod]

24 minutes ago, zomeizter said:

Ha! I thought the AMC 20 was a POS axle. Well, according to the internet...I will replace my 4.10 geared AMC 20 for an 8.8, so I think it will be up for grabs...

 

Let me know when it's available - I'm pretty close to you. 

[Pete M]

4 minutes ago, zomeizter said:

So it's not a POS?

 

nope.  on par with the dana 44, 8.8, and late model 8.25   

 

I mean, yes.  it's a total waste of money and you should give it to Don for free.  

[zomeizter]

1 minute ago, HOrnbrod said:

 

Let me know when it's available - I'm pretty close to you. 

Will do.

[zomeizter]

2 minutes ago, Pete M said:

 

nope.  on par with the dana 44, 8.8, and late model 8.25   

 

I mean, yes.  it's a total waste of money and you should give it to Don for free.  

Hahaha! 

[specauto]

On 11/20/2018 at 4:54 PM, dasbulliwagen said:

My 86 V6 4x4 with a 5 speed had 4:10's. Those axles and trans got put into my 87. I also have an 86 XJ Waggy V6 4x4 NP229 auto, but I don't know what gears are in it yet.

 

M5 (5th MJ) I picked up (86) has 2.8 six with auto and 4.10 gears

[HOrnbrod]

On 11/27/2018 at 5:49 PM, zomeizter said:

Hahaha! 

 

Sounds like a great idea to me.  

 

Anyone ever done disk brakes on an AMC-20?