Topic: Can someone Help me Identify what Marlin Transfer Case I have?

[Dcal714]

Hello All.

I have spent a couple hours reading through posts, looking through the "bible" in the online store, yet I have not been able to identify my equipment.

Here are two pictures of the front and rear transfer cases.

I may need better quality; please just ask.

I do not have a picture of the shifter knob but it says 2.28 on it and I know from the previous owner (who installed it) that it is a Marlin product.

Help!
Thanks!

[Teran H.]

trailgear crossmember, almost impossible too tell anything about the case

[Cheesemaker]

What your gonna have to do is clean than dual case assembly.  So, you can look for some stampings and markings.  Above the front output shaft you will see some markings like these in the picture.



But from what I can see in your fuzzy picture, the stampings don't match the ones in picture from Marlin.  So, you will need to get dirty.  And if you can find some engraved numbers.  All adapters and transmissions (IIRC) have numbers and Marlin keeps records on what number was sold to the original purchaser, and whether it was just an adapter or a full setup and what gears were installed.  Stock 2.28 or 4.7 gears.  So, get cleaning and let us know what you find out.   

[RickerRicker19]

I would almost bet that since it's a TG crossmember.....it would be an adapter from them as well. Just my .02 though.

[Cheesemaker]

I hear stories of people selling rigs, and telling the buyer that all the stuff is from Marlin Crawler, only to find out it isn't.  I've heard of guys buying axles with the PO selling them as having Longfields in them, and they were stock shafts. 

If Dcal714 would take better pictures of the adapter, we could tell the manufacturer of the adapter.  There are two companies that makes nearly identical adapters, and from the outside, the only way to tell, is to see the stampings. 

[Nimyad]

I'd bet it's a tg adapter, post a pic of the shift knob

[Teran H.]

after some google 

im 95% sure its TG

but all in all they last iv had buds that have been using them with no issues they use  "A special retainer ring securely stabilizes the main bearing to prevent bearing play" instead of the double bearing setup

[Dcal714 [OP]]

pssshhhhh. Well. That's lame.

This kid had marlin stickers all over the rig.

I'm thinking it's a TG as well.

Well at least I know what I need to get next.

THANKS FOR THE INPUT! 

I'll get better pictures too, after I clean it. I'll get a picture of the shift knob.

[BigMike]

Your pics are blurry but It looks like it has small & wimpy flanges and the incorrect sized and difficult to install and service nylock nuts. If what I'm seeing is right, then you've got a Trail-Failure adaptor.

BigMike


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[NorCalPR]

after some google 

im 95% sure its TG

but all in all they last iv had buds that have been using them with no issues they use  "A special retainer ring securely stabilizes the main bearing to prevent bearing play" instead of the double bearing setup

The bearing cage doesn't move in any adapter, it's the single row bearing that has play and develops more play as time goes on.




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[BigMike]

"A special retainer ring securely stabilizes the main bearing to prevent bearing play" instead of the double bearing setup

Just read this. That ring is just a bearing retainer. All dual cases on the market including Inchworms and A/A use bearing retainers. That is nothing new under the sun.

It's very simple to understand. Bearings have two races: A fixed outer race, the ball bearings, and then the rotating inner race. The "special ring" holds the bearing in place by "locking" or pressing the outer race of the bearing to the adapter. It can't hold the inner race because this race must spin freely for the coupler to rotate.

The performance of the bearing to hold fast the coupler and minimize the risk of coupler-and-input failure (strip-out) has NOTHING to do with how the outer race of the bearing is held. Weld it in place if you want to. It has everything to do with how well the bearing can support it's inner race.

Here is the difference between the bearing TG uses and the bearing Marlin Crawler uses:

And here is the comparison of their ability to hold the coupler with minimum axial movement:

If the bearing can't support the coupler, and the coupler moves and wiggles under load and coast, then it will be rubbing and grinding against the input gear prematurely wearing both of them out.

To compound the problem, compared to our Chromoly design, TG couplers use an inferior material. So not only is their bearing unable to support their coupler, their coupler itself is weak.

Here is what you get with a Marlin Crawler:


Bottom line, if you want a cheap dual case adapter that won't last as long as it should, then buy the one that comes with a "special retainer ring".

Regards,
BigMike


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[Nimyad]

If you want a cheap dual case adapter that won't last long, then buy the one that comes with a "special retainer ring".

Regards,
BigMike

While I agree that without a doubt marlin crawlers adapter is superior in every way this statement isn't true. When I was building my truck I got an awesome deal on a tg adapter so I ran it. Now with over 20k miles and 30 wheeling trips on it it's still holding up just fine.

[BigMike]

nimyad,

Thank you, I amended my sentence slightly. That's awesome that it's lasting so long! Congrats


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[Nimyad]

nimyad,

Thank you, I amended my sentence slightly. That's awesome that it's lasting so long! Congrats


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Thanks! If it ever goes to crap it'll be a marlin crawler adapter that takes it's place :thumbup:

[Dcal714 [OP]]

Now that, was an informative thread.

Thanks.

[NorCalPR]

While I agree that without a doubt marlin crawlers adapter is superior in every way this statement isn't true. When I was building my truck I got an awesome deal on a tg adapter so I ran it. Now with over 20k miles and 30 wheeling trips on it it's still holding up just fine.

Give it some time. My inchworm with a single row bearing started to strip the splines 20k miles in. Didn't fail, but would have in another year.

Only way to confirm that coupler spline wear is not occurring is to disassemble the case and inspect the splines. Just because it "has not failed" does not mean that fretting is not occurring.




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[NorCalPR]

Fwiw, the inchworm adapters use marlin internals, so marlin and inchworm adapters are both bulletproof, tg and aa being the only two that still use inferior single row bearings


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[Teran H.]

Fwiw, the inchworm adapters use marlin internals, so marlin and inchworm adapters are both bulletproof, tg and aa being the only two that still use inferior single row bearings


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AA started using double row bearings

[BigMike]

Fwiw, the inchworm adapters use marlin internals, so marlin and inchworm adapters are both bulletproof

This is correct, Inchworm is now using our bearings and couplers and we've co-designed the updated MC08 billet adapter plate which is now rotatable

AA started using double row bearings

Correction, AA started using a quantity of two single-row bearings further illustrating the need to improve on the single row bearing design.

BigMike

[Teran H.]

ahh alright thanks^^^