Help to identify what I have, locker question

[diddy2003]

Here is a picture of the front Dana 30 .





Here are some pictures of the rear AMC20 .

 

[CJ]

The Dana 30 looks like it has a Trac-Lok Limited slip carrier (may be different, would need numbers), the AMC20 is an open diff.

 

[diddy2003]

The Dana 30 looks like it has a Trac-Lok Limited slip carrier (may be different, would need numbers), the AMC20 is an open diff.

Ok. So its def an open diff then. I was told it had a locker in the rear too but it didn't look like it to me, which is why I asked.

 

[CJ]

Looks like the ratio is 2.27? 41 / 18? Ouch, are you thinking of upgrading?

 

[diddy2003]

I was told they are 4.10?

 

[diddy2003]

It says 41-10 right in the top picture for the Dana 30 ?

 

[CJ]

It says 41-10 right in the top picture for the Dana 30 ?

It was tough to see in the pic, if it is stamped 41 10 then you do have a 4.1 gear set. I was just going from what I could discern from the picture.

 

[diddy2003]

It was tough to see in the pic, if it is stamped 41 10 then you do have a 4.1 gear set. I was just going from what I could discern from the picture.

They are stamped 41-10. I have a T-176 and was going to run 33s. I was thinking of doing 35s with the 4.10s but I don't want to have to do too much to my CJ to give me the ability to actually run them. I am doing a skyjacker lift and that wouldn't be enough to run the larger tires.

 

[derf]

It was tough to see in the pic, if it is stamped 41 10 then you do have a 4.1 gear set. I was just going from what I could discern from the picture.

Yeah, that 10 almost looks like it could be something else. But you can't get the Dana 30 in a ratio that tall.

 

[diddy2003]

Yeah, that 10 almost looks like it could be something else. But you can't get the Dana 30 in a ratio that tall.

The tallest available was 2.73, correct? 41-18 would equal 2.28 gearing. That would be CRAZY tall And I thought my current 2.73s sucked! :laugh:

On a side note, my buddy, that owns the local jeep shop, says that AMC20 has the factory trac lok . . . . . But it looks nothing like what is in the Dana, which is why I was thrown off.

 

[diddy2003]

I just found these pictures of someones trac lok on jeepforum





Amc 20 Trac Loc? One piece.... - JeepForum.com

They look to be the same to me. I just didn't really understand how the system even worked.

 

[IOPort51]

I don't see any clutch packs in the Dana 20 looks open to me. Did you count teeth on R&P gears?

 

[diddy2003]

Now on to the typical/over asked question: Would you run 35s or 33s with this set-up?

 

[hagar]

The Dana 30 looks like it has a Trac-Lok Limited slip carrier (may be different, would need numbers), the AMC20 is an open diff.

The Dana 30 has a powerlok installed.

 

[73CJ]

Definitely 4.10s

Rear could be a trac-loc. Factory Limited slip. It has clutch packs. Junk if pushed hard.

Front should be a Power loc by Dana. Still got clutch packs.

 

[steve1973]

In 1988 I had a 1983 Scrambler with a AMC 304 swapped in T-176 /Dana 300 with the same 30 up front and 20 in the rear and 4.10 gears I ran 35/15 - 15 Super Swampers with no issues . I ran it that way for three years and sold it. Mud bogs were big back then, so this Scrambler ran quite a few of them hard.

 

[diddy2003]

Thanks for the help everyone.

I have read that the trac lok wasn't the best. Is there anyway to improve it? This is primarily a street jeep with light trails mixed in. Not a lot of trails open around here anymore. Should I rebuild the trac lok with better clutches or switch to something else before putting in the axles?

On the tire thing, I am unsure on size, just looking for some imput. Thanks.

 

[73CJ]

Last Trac-loc clutches I bought ran $75.

I wouldn't waste my money on them any more.

All depends if you plan on keeping and wheeling it. Otherwise, let them slip.

 

[diddy2003]

Last Trac-loc clutches I bought ran $75.

I wouldn't waste my money on them any more.

All depends if you plan on keeping and wheeling it. Otherwise, let them slip.

Ok, I will just leave it alone then. I was just wondering if I should replace the clutches with new/better ones since I had it apart. This is a street jeep mostly and I am not to get anything to aggressive. I saw that people, with mustangs usually, replaced the clutches with carbon versions, which is why I ask.


Is there an auto locker that is good on both the street and light trail along with being simple to install?

 

[73CJ]

Lockrite makes a drop-in, but they require an open differential. Now you're looking at new differential. Take your pick. So any way you look at it they will need to re-shimmed best left to someone who has done it before.

The Powerlock is worth re-building. It is a heavy duty Limited slip.

If you don't off road hard, leave them alone.