The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > All 4x4 Tech & Off Roading

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-28-2014, 04:47 PM   #1
Tito19
Registered User
 
Join Date: Feb 2013
Location: Watsonville California
Posts: 47
Rockwell t221 rebuild??

Just dropped the transfer case and wanted to know what I should look at rplacing. With parts being rare I know it might not be much but maybe you guys know of a few parts that are still available. I'm going to do both output and input seals. Thanks.
Attached Images
 
Tito19 is offline   Reply With Quote
Old 02-28-2014, 11:47 PM   #2
j.kirn
Registered User
 
Join Date: Jun 2006
Location: MO.
Posts: 963
Re: Rockwell t221 rebuild??

replace the bearings
j.kirn is offline   Reply With Quote
Old 03-01-2014, 12:46 AM   #3
Tito19
Registered User
 
Join Date: Feb 2013
Location: Watsonville California
Posts: 47
Re: Rockwell t221 rebuild??

Do you know a good source for them?
Tito19 is offline   Reply With Quote
Old 03-01-2014, 02:45 AM   #4
j.kirn
Registered User
 
Join Date: Jun 2006
Location: MO.
Posts: 963
Re: Rockwell t221 rebuild??

you don't always have to go by application to find a bearing just a guy behind the prts dept to size up what you need. other parts for your t-case can be made such as gears if needed, but will cost. others throw these t-cases away because they say they cannot find parts or they are noisy
j.kirn is offline   Reply With Quote
Old 03-01-2014, 02:47 AM   #5
j.kirn
Registered User
 
Join Date: Jun 2006
Location: MO.
Posts: 963
Re: Rockwell t221 rebuild??

same thing with the closed knuckle axle people throw them away because they say parts cant be found or they don't have a tight turning radius, lol
j.kirn is offline   Reply With Quote
Old 03-01-2014, 02:49 AM   #6
j.kirn
Registered User
 
Join Date: Jun 2006
Location: MO.
Posts: 963
Re: Rockwell t221 rebuild??

or better yet they have drum brakes on them and they don't have disc brakes so they cant stop fast enough
j.kirn is offline   Reply With Quote
Old 03-01-2014, 12:38 PM   #7
61K10
Registered User
 
61K10's Avatar
 
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,009
Re: Rockwell t221 rebuild??

any bearing place/napa/rockauto has the bearings/seals. do the shafts spin smooth with no movement up/down /sideways? why did you remove it?
__________________
1961 chevy K10

my build is------------61K10 build
61K10 is offline   Reply With Quote
Old 03-01-2014, 12:40 PM   #8
61K10
Registered User
 
61K10's Avatar
 
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,009
Re: Rockwell t221 rebuild??

And yes Joe i am keeping my closed knuckle--just won't turn around lol.
__________________
1961 chevy K10

my build is------------61K10 build
61K10 is offline   Reply With Quote
Old 03-02-2014, 02:41 PM   #9
Tito19
Registered User
 
Join Date: Feb 2013
Location: Watsonville California
Posts: 47
Re: Rockwell t221 rebuild??

Removed it because she was leaking from what seemed to be the input shaft and a few of the end caps. The gears moved fine with no up and down play. When I opened her it looked like PO had done something to it, there was gasket maker on the access panel. I priced out every thing available on Rock Auto, which were all the seals and bearings and came to 90 some thing dollars. That's out of my budget so I'm going to do the seals and one pair of bearings, thinking ideler bearings.
Tito19 is offline   Reply With Quote
Old 03-04-2014, 03:15 AM   #10
60sIron
Registered User
 
60sIron's Avatar
 
Join Date: Nov 2013
Location: Sebastopol California
Posts: 146
Re: Rockwell t221 rebuild??

Having done this I can verify the hard parts, shafts and gears are very hard to come by. Bearings and seals are easy to get. The shaft that takes the hardest hit is the idler shaft, it's the shaft with the largest dia. gear. If I remember correctly you can reverse the shaft to use the splines on the opposite end that aren't worn. The divorced 221 on my 63 was noisy but worked and didn't leak. The married 221 on my 69 I couldn't get it to stop leaking because of the wear on the input shaft was so get it would eat up the seal at a rapid rate. Ended up installing a 205. Good luck.
60sIron is offline   Reply With Quote
Old 03-04-2014, 06:39 PM   #11
dieseldude4bt
Registered User
 
Join Date: Mar 2011
Location: Co
Posts: 400
Re: Rockwell t221 rebuild??

If you are only going to replace two bearings I would replace the input shaft bearings, they run the hottest and are the ones that most often fail. Also make sure the oil feed and drain to them is clear. They feed from oil that is splashed in to a trough.
The original also used shielded bearings to help keep oil on the bearing.
__________________
63 k20 with cummins 4bt, owned sence 1982
dieseldude4bt is offline   Reply With Quote
Old 03-04-2014, 10:59 PM   #12
Tito19
Registered User
 
Join Date: Feb 2013
Location: Watsonville California
Posts: 47
Re: Rockwell t221 rebuild??

Thanks for all the replies. Looks like I have to replace the input shaft and splined coupler. If I can get them at a good price or find them, I'll rebuild it. If I can't I'm gong to do the np205 swap down the road. Any ideas on where to find the parts?
Attached Images
 
Tito19 is offline   Reply With Quote
Old 03-04-2014, 11:01 PM   #13
Tito19
Registered User
 
Join Date: Feb 2013
Location: Watsonville California
Posts: 47
Re: Rockwell t221 rebuild??

Input shaft
Attached Images
 
Tito19 is offline   Reply With Quote
Old 03-04-2014, 11:33 PM   #14
60sIron
Registered User
 
60sIron's Avatar
 
Join Date: Nov 2013
Location: Sebastopol California
Posts: 146
Re: Rockwell t221 rebuild??

If this is a married 221 I believe you're out of luck. The coupler is tough to find. You've never said if it's married or divorced. 205 is the way to go.
60sIron is offline   Reply With Quote
Old 03-05-2014, 01:41 AM   #15
Tito19
Registered User
 
Join Date: Feb 2013
Location: Watsonville California
Posts: 47
Re: Rockwell t221 rebuild??

Married. I'm going to hold out for a bit. If nothing comes up ill dive into the 205.
Tito19 is offline   Reply With Quote
Old 03-05-2014, 02:17 AM   #16
60sIron
Registered User
 
60sIron's Avatar
 
Join Date: Nov 2013
Location: Sebastopol California
Posts: 146
Re: Rockwell t221 rebuild??

Tito19 here is a cobbie fix I did to buy time. Not proud of it but it got me by. As stated before the seals won't last because of the ware on the shaft and coupler. After a very short time it would start leaking like a stuck pig. I made gaskets for the casting that mated the tranny and transfer case and sealed up the weap hole with gasket sealer. That way when the transfer case leaked it just filled up the casting. Not perfect but beat 90w all over everything.
60sIron is offline   Reply With Quote
Old 03-05-2014, 03:11 AM   #17
Tito19
Registered User
 
Join Date: Feb 2013
Location: Watsonville California
Posts: 47
Re: Rockwell t221 rebuild??

Completely agree on the seal getting ate up. It happened on the rear output shaft. I installed a repair sleeve and no more leaking. If I reinstall the worn coupler I will use a repair sleeve on it as well. But yea gear oil getting slung all over the exhaust,Trans, driveway etc. sucks, so you temp fix is a better option.
Tito19 is offline   Reply With Quote
Old 03-05-2014, 03:29 AM   #18
60sIron
Registered User
 
60sIron's Avatar
 
Join Date: Nov 2013
Location: Sebastopol California
Posts: 146
Re: Rockwell t221 rebuild??

Good luck! I'm not a fan of replacing stuff just to replace it. I just got tired of pulling my hair out dealing with the 221. I stuck it out until a sweet deal on a 205 came along. I have a lot of parts because I knew they were hard to come by. So when I had a chance to pick one up I'd grab it. Funny thing is with all I have the same parts are shot, must mean something.......
60sIron is offline   Reply With Quote
Old 03-05-2014, 10:09 PM   #19
BLT gmc
Senior Member
 
Join Date: Feb 2014
Location: West Iowa
Posts: 1,082
Re: Rockwell t221 rebuild??

An original t221 couple is tough to find and expensive. To solve the tough to find part you can purchase a 10 spline coupler for a 205 (readily available). It will be to long and too small in diameter. A very good machinist cut this to length make a speedy sleeve and press it together. I know it takes care of the tough to find but does very little for the expensive part. It is amazing what some will do to keep them original and rolling. Good Luck, Bruce
BLT gmc is offline   Reply With Quote
Old 04-01-2014, 03:08 PM   #20
Tito19
Registered User
 
Join Date: Feb 2013
Location: Watsonville California
Posts: 47
Re: Rockwell t221 rebuild??

After looking for almost a month I've deciding to go with the np205 swap. Thanks for all the replies.
Tito19 is offline   Reply With Quote
Old 04-02-2014, 04:37 PM   #21
dave666693
Senior Member
 
dave666693's Avatar
 
Join Date: Jul 2005
Location: Edgewood, WA
Posts: 872
Re: Rockwell t221 rebuild??

are those Rockwell's worth anything? I ended up with one, but all my trucks have NP205's.
__________________
67 C20/
68 C10 stepside/inline 250--current project
71 GMC 4x4
70 Blazer project-Zombie assault vehicle
67 4x4 Burb
dave666693 is offline   Reply With Quote
Old 04-02-2014, 05:08 PM   #22
j.kirn
Registered User
 
Join Date: Jun 2006
Location: MO.
Posts: 963
Re: Rockwell t221 rebuild??

why are you selling yours
j.kirn is offline   Reply With Quote
Old 04-03-2014, 09:24 AM   #23
wayne4252004
Registered User
 
wayne4252004's Avatar
 
Join Date: May 2012
Location: Lima, Ohio
Posts: 103
Re: Rockwell t221 rebuild??

My 72 had the closed knuckles and sm465 with married 221. It was a tank. We rebuilt the 221 the parts came from a place in Michigan. I found it in the advertisements in the back of Peterson's four wheel drive magazine. That was about 5 years ago, ended up selling the truck to a guy in Indiana, wish I had never let it go.
wayne4252004 is offline   Reply With Quote
Old 04-03-2014, 10:06 AM   #24
Redcap
Registered User
 
Join Date: May 2010
Location: Lewis County, WA
Posts: 1,521
Re: Rockwell t221 rebuild??

205 is a far better case than the T221 anyway.
__________________
'77 K35 - 454, SM465/NP205, 4.56 D60/14bFF
Redcap is offline   Reply With Quote
Reply

Bookmarks

Tags
rockwell, t221, transfer case

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:06 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com