the can of worms is now open! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1969 GMC · 03-26-2004, 01:07 AM

today I took the T221 and adapter off my truck (gosh it was a PITA...the "hidden bolts" under the inspection cover of the adaptor drove me bonkers). however, much to my dismay, when I took the adapter and coupler sleeve off, I found that the splines on the out put of the transmission were pretty well worn. Also the coupler sleeve was almost smooth inside on the transmission side. I am attaching some pics, what can I do about this? I do happen to have a spare 4x4 SM465 in the garage, but I don't really want to swap trannies unless its the only thing I can do (i'm working in my gravel driveway...tranny jack = not move). I do know the spare SM465 I have is very low miles...was told this by the p/o, and the output shaft and the NP205 coupler sleeve arent worn at all and look brand new. any advice? thanks...

1969 GMC · 03-26-2004, 01:08 AM

#2, the sleeve

**MJN** · 03-26-2004, 01:20 AM

I know you probably don't wanna hear this but you better switch the tranny and t-case cause those splines aren't going to get any better. The only thing you can do is to change shafts and changing the whole tranny is a whole lot easier than changing the main shaft. I know what it's like on a gravel driveway, did mine the same way.

1969 GMC · 03-26-2004, 01:40 AM

damn, I'm already replacing the transfer case and adaptor so at least it isn't that bad.
When I took my transfer case off, I found a pretty big problem. The gear oil inside was a silvery color because of all the metal flakes that I assume came from the adaptor and tranny shaft. front and rear output seals are shot and leak like a b!tch. there were a small handful of curious looking broken metal pieces in the bottom of the case, and some more on the input shaft of the transfer case itself. i don't even know what they are from

. and the bearing on the input shaft is really wobbly and doesn't have all the ball bearings in it. i'm glad that im switching to NP205.

Chevyguy111786 · 03-26-2004, 01:46 AM

put a piece of ply wood or two under there to move your jack around on.... might make things a little easier...whats 20 bucks to make a job a HECK of a lot easier...

**Yukon Jack** · 03-26-2004, 12:35 PM

I agree with the above, better off just putting in the other tranny. Good luck and get that piece of plywood - it will make your life alot easier.

cableguy0 · 03-26-2004, 01:08 PM

the easiest thing to do it to yank the tranny and swap it. as stated go get yourself a nice sheet of plywood the jack rolls a lot nicer on that not the mention it doesnt hurt near as much to lay on rocks poking you in the back sucks

03-26-2004, 01:07 AM	#1
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	the can of worms is now open! today I took the T221 and adapter off my truck (gosh it was a PITA...the "hidden bolts" under the inspection cover of the adaptor drove me bonkers). however, much to my dismay, when I took the adapter and coupler sleeve off, I found that the splines on the out put of the transmission were pretty well worn. Also the coupler sleeve was almost smooth inside on the transmission side. I am attaching some pics, what can I do about this? I do happen to have a spare 4x4 SM465 in the garage, but I don't really want to swap trannies unless its the only thing I can do (i'm working in my gravel driveway...tranny jack = not move). I do know the spare SM465 I have is very low miles...was told this by the p/o, and the output shaft and the NP205 coupler sleeve arent worn at all and look brand new. any advice? thanks... Attached Images __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

03-26-2004, 01:20 AM	#3
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,975	I know you probably don't wanna hear this but you better switch the tranny and t-case cause those splines aren't going to get any better. The only thing you can do is to change shafts and changing the whole tranny is a whole lot easier than changing the main shaft. I know what it's like on a gravel driveway, did mine the same way. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

03-26-2004, 01:40 AM	#4
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	damn, I'm already replacing the transfer case and adaptor so at least it isn't that bad. When I took my transfer case off, I found a pretty big problem. The gear oil inside was a silvery color because of all the metal flakes that I assume came from the adaptor and tranny shaft. front and rear output seals are shot and leak like a b!tch. there were a small handful of curious looking broken metal pieces in the bottom of the case, and some more on the input shaft of the transfer case itself. i don't even know what they are from . and the bearing on the input shaft is really wobbly and doesn't have all the ball bearings in it. i'm glad that im switching to NP205. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

03-26-2004, 12:35 PM	#6
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,683	I agree with the above, better off just putting in the other tranny. Good luck and get that piece of plywood - it will make your life alot easier. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

03-26-2004, 01:08 PM	#7
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	the easiest thing to do it to yank the tranny and swap it. as stated go get yourself a nice sheet of plywood the jack rolls a lot nicer on that not the mention it doesnt hurt near as much to lay on rocks poking you in the back sucks __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

03-26-2004, 01:08 AM	#2
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	#2, the sleeve Attached Images __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

03-26-2004, 01:46 AM	#5
Chevyguy111786 Registered User Join Date: Apr 2003 Location: Garland, Texas Posts: 1,127	put a piece of ply wood or two under there to move your jack around on.... might make things a little easier...whats 20 bucks to make a job a HECK of a lot easier...



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