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The Big Badda-Boom! T-case questions

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blzrdrvr

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Joined
Apr 28, 2005
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Location
Las Cruces, NM
Coming home form The Old Man's house the other day, after discussing with him about certain a noise i had, this happened:
deadtcase.jpg

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...on the highway. The 4" blocks in the rear prevented my DS from contacting the ground, by a mere few inches. So, kids, get a lift kit and/or a DS u-bolt so your DS doesn't end up being repurposed as a pogostick for your truck!

I don't really want a used unit. A re-manned or new is due. Now: My buddy has a NP 208, new, that has been made into a gear to gear unit (unless he is mistaken of the model) that is married to an auto tranny.

Questions:
-Should the input of his unit not match the output of my SM465, would it be possible to get the parts required to make it work? (Such as the input gear, bearing, race, and seal)
-I will have to get a longer DS made, as his rear output is shorter and is not a slip yoke...Is all this worth the trouble?
-Should I even get a NP208, can/should I get a NP205 that i can bolt on and not have other hassles, besides trick u-joints?

Thank you for your advice, fellas. The Old Man, My Buddy, and I have not been this territory much, and i am leading.
Beer Smiley
 
I've never heard of a 208 converted to all gear . Yours is a 208.

How are your motor and tranny mounts? Does your front driveshaft slip work and not bind? Were all the bolts tight? Was it full of fluid?
 
Deuling said:
I've never heard of a 208 converted to all gear . Yours is a 208.
Click to expand...

Me neither. Thought it was an odd ball, but i have an engine that half the internet says cannot be, yet i have one, and it runs quite well.

Deuling said:
How are your motor and tranny mounts? Does your front driveshaft slip work and not bind? Were all the bolts tight? Was it full of fluid?
Click to expand...

The cause is not the problem. What to do henceforth is the present quandary. As stated, i was on the highway, and the front DS was not connected, nor was the slip present, nor was it engaged. The RE had no binding issues. Engine mounts are new and solid, and the tranny can't be moved by anything other than an IED.

I make damned sure the transmission and Tcase are well lubed. I fully realize the import. I had been having this "strange sound" under certain conditions at highway speeds for a very long time, i knew that it was the sound of an unhappy bearing. Of which, i had no idea, as the sound could only be reproduced under a load.

Cause? i don't care for cause. I'm quite sure age and use are the culprit of the demise.

Get a DS u-bolt so your rig doesn't go bouncing like Tigger on meth. Maybe i mean like a midget with a hard-on. Never thought it would happen to me. I was wrong.
 
rebelgregory said:
I've never heard of a geared 208 either. Also, it'll be a slip yoke unless they modded it using Ford/Dodge parts.
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Good job! It's out of a Dodge set up. Apparently Dodge and GM shared a bunch of parts. i have to look all this crap up. My primary concern is getting the truck into my bay... space is tight...then getting the grenaded unit out. and then measurements.
 
blzrdrvr said:
Apparently Dodge and GM shared a bunch of parts.
Click to expand...

Technically, it's not so much that they shared parts between the 2 companies, just that they bought their parts from the SAME company - New Process, or the 'NP' in NP208.

I know you want to get it back together, but to me, cause is a big deal. Otherwise, you may get the result the second time. With that kind of damage, there are a few immediate suspects - u-joint failure, seized bearing, bad driveline angle, slip yoke bottomed out, etc.

As for the repair, if you're going with some weird fixed-yoke case, that's fine but it's a custom job. You're either going to have to swap around parts to get the proper input shaft and tailhousing length, or maybe bolt it up as-is and measure for new driveshaft. Either way, I'm not much help. I've only played with a regular chevy 208.
 
That happened to my buddy's dodge a couple times. I don't know of It's a normal 208 issue or Not. Pretty sure the output shaft on auto and manual tranny are slightly different. I would try and measure up the dodge box and if it has the same input use it and get a new driveshaft. It will eliminate the slip yolk output on the one you have now. Stronger in my opinion. I think 241 has the same adapter too but I'm not sure on that one on a older 465. I've never heard of a all gear 208 either. If so its something new I'd like to see. 2 wheel drive runs on gears and four wheel drive runs through the chain to the front output as far as I know. I think the dodge case has a 23 spline input. But you can swap your input shaft into the other case as long as its not damaged. I think yours is 27 spline. 32 was a option but I think was on auto trans.
 
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blzrdrvr said:
I don't really want a used unit. A re-manned or new is due. Now: My buddy has a NP 208, new, that has been made into a gear to gear unit (unless he is mistaken of the model) that is married to an auto tranny.
Click to expand...

The case you broke is an NP208 and there is no gear driven NP208, ever, anywhere. He probably has a 203 (chain driven) or 205 (gear driven). The gear driven 205 is far from a bolt on in your situation, but it can be done.
 
I'd be scared to see an aluminum cased, gear driven transfer case. I can only see bad coming from that in the form of a cracked/shattered case from the deflection of the gears.
 
Yeah, your friend either doesn't know what he has, or what he is talking about. Possibly both.

An NP208 behind an SM465 has a 32 spline input. The same as one used with a TH400. An NP208 used with a TH350 or TH700R4 will have a 27 spline input.

Why not just get another used NP208?

Also, keep your exploded NP208 for parts. That 32 spline input is a little more rare than a 27 spline one, and can be interchanged.

Martin
 
Yeah...i must agree with you guys, i have never heard of it either, but I'm not all that knowledgeable...he sent me a pic of the the plate, but the model number i can not make out, the ink is work off, just a bad cell phone pic.

rebelgregory: I know you want to get it back together, but to me, cause is a big deal. Otherwise, you may get the result the second time. With that kind of damage, there are a few immediate suspects - u-joint failure, seized bearing, bad driveline angle, slip yoke bottomed out, etc.
Click to expand...

Ah...i see what you are going for. i'm pretty sure it was a bad bearing in the case itself (this noise had been a "friend" for many years now, just not such a noisome one). The driveline angle was good...11*? it was only a 4" lift, and the RE is a 14b FF...so the pinion is a bit higher than the stock unit that was under it with the same 4" blocks...:dunno: i had highwayed it with the old axles and blocks numerous times...well, as i am heading in the direction of a re-manned tcase, and the the slip yoke has a busted ear...i will be installing new u-joints on both ends of the DS. thanks, Also, keep your exploded NP208 for parts. That 32 spline input is a little more rare than a 27 spline one, and can be interchanged. Thanks, rebelgregory.

82355: Also, keep your exploded NP208 for parts. That 32 spline input is a little more rare than a 27 spline one, and can be interchanged.
Click to expand...
Keep it for parts?!?! Hahahaha! i HAVE to! Spoke with the tranny shop down the street, he has no NP208s, asked him if he would buy my bits...answer was no. can't even get a core charge for it.


Thank you for your advice and education, guys. Can't buy you a beer or hang out, maybe i might have a good suggestion, i do that every so often. So here's a pic of my rig in his Halloween get-up:
http://i200.photobucket.com/albums/aa58/RyanfromNM/iamaboat1.jpg

I had to set it up this way so that i could get pulled and then pushed into my bay by my neighbor who has a big, black, early 2000 Chevy 3500 dually. It's her Mercedes. She still sustained paint damage to the tailgate. I must make amends.
 
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Uh...I will send you two dudes PMs regarding specs. I am really trying to be a good citizen of CK5, i don't need drama and arguments.

I had a question that i submitted to Yahoo! Answers, wherein i described my specs and the problem i was having. I had also done my research before submitting my question, and i saw a shytestorm of nay-sayers and yay-sayers on the specs, so in my question i told responders to Kindly STFU abt the specs (not verbatim), as I have evidence that it does indeed exist and work, and that my question was related something outside the mechanical specs, specifically abt the dizzy and the ESTCU (computer).

Sure enough, some guy just HAD TO look at the specs and mention his 15-years of expertise and how he had never heard of such, and how it could not be, therefor the build was my problem, the least was the dizzy and bits...

I decided to let it go, not giving him a good right-cross about his ignorance, and a haymaker of "Good thing The Old Man has been turning wrenches FOR 45 YEARS, B-!"

So...yeah. I'm just gonna keep this on the DL, k? (BTW...good eye, guys)

Back on-thread: where can i get a t-case online? (Who won't rape me)? I can get a re-manned unit locally for $550...used for $300. I done checked ebay and 4 Steal Partz, Amazon. Is $550 a good deal?

Thank you
 
Post up here on classifieds. Guys are pulling those off all the time to replace with 205's, so I bet people have them laying around. Also check craigslist. This would require you to rebuild though, unless you just dropped it in... You could also look for 241's. From what I understand, they swap in for 208's - but don't take my word on this without confirming it.
 
What are you talking about? Seriously. Just member up already and post a pic of what you have and we will be glad to help. There are plenty of interesting rigs here with odd combos so chances are unless you are powered by a Mr. Fusion processor someone has seen it, owned it or worked on it. There are too many men here with too much knowledge not to not know what you have is rare or not
 
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