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Unread 06-13-2010, 04:51 PM   #1
Wrangler11
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Th400 output shaft removal

I have the qudtratrac off and need to remove the output shaft in order to install the advance adapter's adapter for a np231 transfer case. My question is, how does the output shaft come out?

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Unread 06-13-2010, 05:14 PM   #2
motiv8ya
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You have to tear down the entire transmission, It's the "first thing" you put back into the case upon reassembly.
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Unread 06-13-2010, 05:36 PM   #3
Wrangler11
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That is what I was afraid of. Does anyone know if the output shaft has to come out in order to install advance adapter's adapter? The instructions are junk.
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Unread 06-13-2010, 06:15 PM   #4
motiv8ya
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Yes, you must install the Output shaft that comes with the kit for it to work. The TH400/Quadratrac 10 spline output shaft won't work for the swap.
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Unread 06-13-2010, 06:54 PM   #5
Wrangler11
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Quote:
Originally Posted by motiv8ya View Post
Yes, you must install the Output shaft that comes with the kit for it to work. The TH400/Quadratrac 10 spline output shaft won't work for the swap.
Ah crap. I guess I will be dropping he trans this week then.
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Unread 06-13-2010, 09:29 PM   #6
Wrangler11
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Will I have to take anything apart to get to the input shaft once the transmission is down and opened?
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Unread 06-13-2010, 11:19 PM   #7
CjAl
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you have to take EVERYTHING out. have you ever looked inside an auto trans?

you nee internal and external snap ring pliers and there is a special clutch pack compressor you wil need. Do yourself a favor and find someone to do it for you and rebuild the trans while you are at it
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Unread 06-13-2010, 11:21 PM   #8
CjAl
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here i what you got

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Unread 06-14-2010, 09:45 AM   #9
Wrangler11
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Holly cow! I haven't done it before, but my brother has several times.
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Unread 06-14-2010, 09:55 AM   #10
CjAl
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it comes out in individual clutch pack assemblies. If you look you will see all the clutches go into one drum assembly. Take them out, keep them CLEAN and set them in the proper order for reassembly. the hard part is the last clutch pack that needs to be compressed in order to get the retainer out. that is if the TH400 is the same as the 350's i've done. We made a home made compressor for it.

I would never go through the PITA to disassemble an auto trans without rebuilding it. You can buy a rebuild kit from NAPA or anywhere and replace the parts as you reassemble. just remember to soack the clutches in ATF before assembling them
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Unread 06-14-2010, 11:01 AM   #11
Wrangler11
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Thanks for the tips. Can you rent a compressor for the last clutch? It looks like it is between $200-$300 for a rebuild kit. No too bad.
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Unread 06-14-2010, 12:03 PM   #12
CjAl
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I don't think it's something anyone would have to rent but you could probably take it to a small trany shop (not a big chain one) and ask them to do it for you. would probably do it for free or just a few bucks. Personally I'd have them compress it, relace the rear shaft, put the new clutches in the pack and put it back in. Otherwise you wil have to run it BACK to the shop to have them compress it to put it back together.

I actually think we stood the case on end and put a big piece of pipe down inside it and had somome ush it down by paying on it while another person put the retaining ring back in. the compressor we built didn't work real good and broke as soon as we got it apart
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Unread 06-14-2010, 01:38 PM   #13
Wrangler11
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Quote:
Originally Posted by CjAl View Post
I don't think it's something anyone would have to rent but you could probably take it to a small trany shop (not a big chain one) and ask them to do it for you. would probably do it for free or just a few bucks. Personally I'd have them compress it, relace the rear shaft, put the new clutches in the pack and put it back in. Otherwise you wil have to run it BACK to the shop to have them compress it to put it back together.

I actually think we stood the case on end and put a big piece of pipe down inside it and had somome ush it down by paying on it while another person put the retaining ring back in. the compressor we built didn't work real good and broke as soon as we got it apart
Sorry if I sound like a moron, but I have never worked on a transmission before. Do I have to take the whole trans to a ship to have the rear clutch pack taken out? There are a few shops in the area that I could probably go too. I've just spent so much money on everything the last month and really do not want to have to spend anymore especially to have someone else do the work.
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Unread 06-14-2010, 01:57 PM   #14
CjAl
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you can get the forward clutch pack out by yourself with just some snap ring pliers. whe you get down to the one you need a compressor for it will be the last pack in the case so you will have done most the work by then.

again this is going off my memory of doing a th350 which was about 20 years ago
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Unread 06-14-2010, 03:23 PM   #15
Wrangler11
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Quote:
Originally Posted by CjAl View Post
you can get the forward clutch pack out by yourself with just some snap ring pliers. whe you get down to the one you need a compressor for it will be the last pack in the case so you will have done most the work by then.

again this is going off my memory of doing a th350 which was about 20 years ago
Hopefully they are similar. Any idea on how heavy the trans is and how heavy it will be with everything out besides the last pack? I need to make sure I will be able to bring it somewhere if needed.
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