T Case - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mjensen · 12-18-2011, 10:51 PM

How would you determine if the T Case needs to be rebuilt? This is a Rockwell 221, and rebuilding looks pricey so I want to make an informed decision here.

Chevy1TonFun · 12-18-2011, 11:16 PM

For starters, If its not working or makes awful noises.

mjensen · 12-19-2011, 12:56 AM

It didn't seem to be too bad (last time I drove it anyway). The only thing that I remember being an issue is that it would pop out of 2WD. My grandpa just had a bungy cord holding it in

I'm not sure if that was just an adjustment item or an indication of an issue.

duallyjams · 12-19-2011, 08:59 AM

Upgrade to a np205.

67gmcstepside · 12-19-2011, 09:53 AM

I just upgraded my T221 to a NP205 and it wasnt that difficult. I rebuild the trans and the only hard part was getting the heavy trans and TC back in by myself. Very doable. You will need new drive shafts.

1969K10 · 12-19-2011, 04:33 PM

the popping out of 2WD, would be a spring that is worn out. You are correct, rebuildling a 221 will get expensive. I liked mine much more than the NP205 I'm running now.

That being said, I had to fab a new cross member for the carrier bearing, and shorten the rear drive shaft, when I converted to the 205. IIRC, the front d/s will be OK.

67gmcstepside · 12-19-2011, 08:33 PM

I have 2 221's. One that worked fine in my truck and a parts donor. If you can describe what you need I can pull it from one or the other. They are going to the scrape yard soon.
Posted via Mobile Device

mjensen · 12-19-2011, 09:34 PM

Quote:

Originally Posted by 67gmcstepside

I have 2 221's. One that worked fine in my truck and a parts donor. If you can describe what you need I can pull it from one or the other. They are going to the scrape yard soon.
Posted via Mobile Device

I'm not even sure what to look for to know what I would need.

mjensen · 12-23-2011, 06:03 PM

Okay, so I've torn it down just a bit. Can anyone tell me if you think this is worth rebuilding based upon what you see?

Bearing was destroyed.

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mjensen · 12-26-2011, 11:54 PM

Well, after looking at this a bit more it seems like the input shaft probably needs to be replaced. I'm not sure if I'm going to rebuild this case or try and find me a 205.

duallyjams · 12-27-2011, 09:42 AM

Time to cut your losses and move on.

67gmcstepside · 12-27-2011, 12:15 PM

I have parts if you need them. Scraping 2 case in the next week or so.

mjensen · 12-28-2011, 10:22 PM

Quote:

Originally Posted by 67gmcstepside

I have parts if you need them. Scraping 2 case in the next week or so.

If you have an input shaft that looks better than this one (and if the bearing that goes with it is in good shape) I would be interested.

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12-18-2011, 10:51 PM	#1
mjensen Registered User Join Date: Jun 2006 Location: Utah Posts: 1,562	T Case How would you determine if the T Case needs to be rebuilt? This is a Rockwell 221, and rebuilding looks pricey so I want to make an informed decision here. __________________ Mike '69 GMC 3/4 ton 4x4 Build Thread

12-18-2011, 11:16 PM	#2
Chevy1TonFun Grease Monkey Join Date: Oct 2007 Location: Fresno CA Posts: 750	Re: T Case For starters, If its not working or makes awful noises. __________________ Tow Rig: 2012 Chevy 2500HD CCSB LTZ Z71 4x4 Duramax Ultimate Offroad Build: 1978 Chevy Silverado K30 Crewcab Build Link http://67-72chevytrucks.com/vboard/s...d.php?t=654053 Mud Truck: 1972 Chevy Cheyenne K30 4x4, 468/400/205, D60/D70HD, 18" Custom Lift, 17x39" IROKs FOR SALE http://67-72chevytrucks.com/vboard/c...ton-4x4&cat=12

12-19-2011, 12:56 AM	#3
mjensen Registered User Join Date: Jun 2006 Location: Utah Posts: 1,562	Re: T Case It didn't seem to be too bad (last time I drove it anyway). The only thing that I remember being an issue is that it would pop out of 2WD. My grandpa just had a bungy cord holding it in I'm not sure if that was just an adjustment item or an indication of an issue. __________________ Mike '69 GMC 3/4 ton 4x4 Build Thread

12-19-2011, 08:59 AM	#4
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: T Case Upgrade to a np205. __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

12-19-2011, 09:53 AM	#5
67gmcstepside Registered User Join Date: Jan 2010 Location: jackson Posts: 676	Re: T Case I just upgraded my T221 to a NP205 and it wasnt that difficult. I rebuild the trans and the only hard part was getting the heavy trans and TC back in by myself. Very doable. You will need new drive shafts.

12-19-2011, 04:33 PM	#6
1969K10 Senior Member Join Date: Jul 2004 Location: Clarks Hill, Indiana Posts: 733	Re: T Case the popping out of 2WD, would be a spring that is worn out. You are correct, rebuildling a 221 will get expensive. I liked mine much more than the NP205 I'm running now. That being said, I had to fab a new cross member for the carrier bearing, and shorten the rear drive shaft, when I converted to the 205. IIRC, the front d/s will be OK. __________________ 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)

12-19-2011, 08:33 PM	#7
67gmcstepside Registered User Join Date: Jan 2010 Location: jackson Posts: 676	Re: T Case I have 2 221's. One that worked fine in my truck and a parts donor. If you can describe what you need I can pull it from one or the other. They are going to the scrape yard soon. Posted via Mobile Device

12-23-2011, 06:03 PM	#9
mjensen Registered User Join Date: Jun 2006 Location: Utah Posts: 1,562	Re: T Case Okay, so I've torn it down just a bit. Can anyone tell me if you think this is worth rebuilding based upon what you see? Bearing was destroyed. __________________ Mike '69 GMC 3/4 ton 4x4 Build Thread

12-26-2011, 11:54 PM	#10
mjensen Registered User Join Date: Jun 2006 Location: Utah Posts: 1,562	Re: T Case Well, after looking at this a bit more it seems like the input shaft probably needs to be replaced. I'm not sure if I'm going to rebuild this case or try and find me a 205. __________________ Mike '69 GMC 3/4 ton 4x4 Build Thread

12-27-2011, 09:42 AM	#11
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: T Case Time to cut your losses and move on. __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

12-27-2011, 12:15 PM	#12
67gmcstepside Registered User Join Date: Jan 2010 Location: jackson Posts: 676	Re: T Case I have parts if you need them. Scraping 2 case in the next week or so.



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