T Case Bracket different 205 vs rockwell - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SunSoaked · 05-27-2012, 02:57 PM

Just discovered my NP205 is actually a rockwell. I plan on swapping in a 205 but the question is:

Is this a bolt in swap or am I gonna need to change x-member and/or braces to accomadate the 205?

vectorit · 05-27-2012, 04:40 PM

Pretty sure there is a difference in the width of the adapter between the trans and the Tcase, the 205 set up I think will cause you to relocate the cross member and modify the drive shafts?

Sure someone more experienced in this will chime in eventually.

msgross · 05-27-2012, 04:50 PM

I "think" that the crossmember is the same but you will need to find a NP205 with the trans adapter attached. Driveshafts are also different. Holes in the floor hump are different as well.

Why change if it works?

odog · 05-27-2012, 10:58 PM

I agree, if the rockwell works, why go through the trouble of changing. I was going to change to a 205, but it wasnt worth the hassle, I ended up staying with the 221, its a good tcase, just hard to find parts for. My suggestion is run it til it pukes then do a swap.

1969K10 · 05-31-2012, 05:27 PM

You will need a new/different cross member, and to shorten your rear drive shaft. The front one might be OK, I had both fronts when I made the change, and don't remember which I used.

05-27-2012, 02:57 PM	#1
SunSoaked Registered User Join Date: Dec 2011 Location: Yuma Arizona Posts: 1,525	T Case Bracket different 205 vs rockwell Just discovered my NP205 is actually a rockwell. I plan on swapping in a 205 but the question is: Is this a bolt in swap or am I gonna need to change x-member and/or braces to accomadate the 205?

05-27-2012, 04:40 PM	#2
vectorit What? Join Date: Jun 2007 Location: Southern California Posts: 7,617	Re: T Case Bracket different 205 vs rockwell Pretty sure there is a difference in the width of the adapter between the trans and the Tcase, the 205 set up I think will cause you to relocate the cross member and modify the drive shafts? Sure someone more experienced in this will chime in eventually. __________________ Chris 1968 K20 Suburban 1972 K10 LWB PU

05-27-2012, 04:50 PM	#3
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: T Case Bracket different 205 vs rockwell I "think" that the crossmember is the same but you will need to find a NP205 with the trans adapter attached. Driveshafts are also different. Holes in the floor hump are different as well. Why change if it works? __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

05-27-2012, 10:58 PM	#4
odog Registered User Join Date: Oct 2007 Location: Wendell, Idaho Posts: 608	Re: T Case Bracket different 205 vs rockwell I agree, if the rockwell works, why go through the trouble of changing. I was going to change to a 205, but it wasnt worth the hassle, I ended up staying with the 221, its a good tcase, just hard to find parts for. My suggestion is run it til it pukes then do a swap. __________________ 1969 4x4 Nothing beats a good rock drill and some dynamite

05-31-2012, 05:27 PM	#5
1969K10 Senior Member Join Date: Jul 2004 Location: Clarks Hill, Indiana Posts: 733	Re: T Case Bracket different 205 vs rockwell You will need a new/different cross member, and to shorten your rear drive shaft. The front one might be OK, I had both fronts when I made the change, and don't remember which I used. __________________ 1969 K10 - V8, 465, 205, 12 bolt, D44 2002-current 1969 K20 - V8, 465, 221, Eaton, D44 2012-current Nothin' but drums on all 4 corners! past horses in the stable 72 C10-short step (97-02), 68 C10-long fleet (06-12)



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