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Transfercase extension? HELP!!!

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Old Apr 4, 2021 | 01:27 PM
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From: ****hole...I mean IL
Transfercase extension? HELP!!!

The piece between the transfercase and back of the transmission....is it and extension or an adaptor....it's on a 2005 f-250 with and 8in suspension lift....needless to say that piece cracked and is now in about 6 pieces under the truck....I need to know what it is for sure and where to get one as I need the truck ASAP...
 
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Old Apr 4, 2021 | 03:58 PM
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Like so:

https://3.bp.blogspot.com/_5EqFq6i9r...on+Housing.jpg

That for a 4R100. What engine and transmission do you have?

It's called the transfer case adapter BTW.

From this thread:

https://www.ford-trucks.com/forums/1...se-spacer.html

You will be better served in the Super Duty forum, so I have moved your post there.

Good luck!
 
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Old Apr 4, 2021 | 05:47 PM
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What happened? Did it just break while you were driving it? Seems like it would take some major compression to break it.
 
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Old Apr 4, 2021 | 06:44 PM
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Transfer case adapter or tailshaft housing - I personally feel either is acceptable and use them interchangeably.

If using the latter you may want to preface it with "4wd" which indicates a t-case would have to hang on the back.

I cracked one on Hole In the Rock decades ago in my old '90 Bronco (E4OD/1356). I did find my driveshaft bolts at the t-case flange had backed out considerably and I think this was allowing the d/s to "jack" the t-case (up) under load.

That was at least the best I could figure....the adapter itself never took a direct hit on the trail and the t-case was well skidded.....the only variable was loose d/s bolts
 
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Old Apr 4, 2021 | 09:26 PM
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From: ****hole...I mean IL
Originally Posted by Gyppo Logger
What happened? Did it just break while you were driving it? Seems like it would take some major compression to break it.
Drive shaft went out going down interstate at about 75mph think it mite have taken a hit then but started to notice unusual sounds and then finally the transfercase shifted enough to where it was catching and grinding ......what's the purpose of the thing anyway
 
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Old Apr 4, 2021 | 10:07 PM
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Originally Posted by 6.slower
Drive shaft went out going down interstate at about 75mph think it mite have taken a hit then but started to notice unusual sounds and then finally the transfercase shifted enough to where it was catching and grinding ......what's the purpose of the thing anyway
"thing"?

The adapter is used to hook up the transfer case to the transmission so it can get motive power, the transfer case itself takes that motive power it gets from the transmission and selectively sends it to the rear axle or to both the rear axle and front axles as the operator desires depending on need. The transfer case also provides added torque multiplication for low speed crawling.

When this event occurred, you were hopefully in 2WD, not 4WD I hope? Drive shaft failure shouldn't cause shifting, but a bad vibration from a slinging yoke could crack/break the adapter.

Was this the shaft you were swapping in earlier?
 
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Old Apr 5, 2021 | 03:38 AM
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From: ****hole...I mean IL
Originally Posted by tbear853
"thing"?

The adapter is used to hook up the transfer case to the transmission so it can get motive power, the transfer case itself takes that motive power it gets from the transmission and selectively sends it to the rear axle or to both the rear axle and front axles as the operator desires depending on need. The transfer case also provides added torque multiplication for low speed crawling.

When this event occurred, you were hopefully in 2WD, not 4WD I hope? Drive shaft failure shouldn't cause shifting, but a bad vibration from a slinging yoke could crack/break the adapter.

Was this the shaft you were swapping in earlier?
Was definitely in 2wd....I'm aware of what and how the transfercase works and such but this "adaptor" is nothing more than a empty sleeve with a bearing in it that the spline goes through into the rear of the trans......just don't know why there is a need for it. I may be wrong but regardless where would you recommend getting one at? Again it's a 2005 f250 super duty with the ****.o (6.0) automatic trans has 8" lift sitting on 37" tires little more than stock motor but trans is untouched..
 
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Old Apr 5, 2021 | 07:08 AM
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Originally Posted by 6.slower
Was definitely in 2wd....I'm aware of what and how the transfercase works and such but this "adaptor" is nothing more than a empty sleeve with a bearing in it that the spline goes through into the rear of the trans......just don't know why there is a need for it. I may be wrong but regardless where would you recommend getting one at? Again it's a 2005 f250 super duty with the ****.o (6.0) automatic trans has 8" lift sitting on 37" tires little more than stock motor but trans is untouched..
Well, it does not HAVE to be there. Back in the day they were separate, with a short drive shaft between them. But they both then need to be mounted to the frame. Then when you do that, you also will likely need different front and rear drive shafts also.
That was called the “divorced” trans / TC. IIRC, it was in the late 1960’s that they changed over to the “married” trans / TC where the trans and TC were flanged together. But to convert back to the divorced system would take a lot of work.
 
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Old Apr 5, 2021 | 08:25 AM
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Well typically your park pawl lives in the adapter. There's a pinhole in rear of tranny that allows for a bit of ATF back there for splash lube of the park pawl. The adapter is necessary to give the t-case somewhere to attach, otherwise as noted you'd have to hang it from the frame and have a tiny d/s from rear of tx to t-case.

Manufacturers could also just install a slip shaft adapter for 2wd, or the t-case adapter for 4wd. Of course I say "just" although in 90% of applications the tailshaft itself is different so you need to know if you're building a 2wd or 4wd automatic from the start, ie you cannot later just swap the housing and go from 2wd to 4wd for a custom build or tx swap

The tailshaft housing is also where the transmission mount attaches in most cases--- otherwise it'd be under the pan
 
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Old Apr 5, 2021 | 10:34 AM
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I believe you need this one. You mentioned it had the shaft AND bearing which lead me to believe you had a 5r110 as I don't think the 4r100 has the bearing in the extension/adapter housing. so here ya go:

https://www.ebay.com/itm/5R110W-TORQ...UAAOSwQTVWCsq6
 
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