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(TH-400) Can you change the shift-linkage seal...

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Old 07-16-2005, 09:33 PM   #1
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Default (TH-400) Can you change the shift-linkage seal...

...without dropping the pan? I removed my exhaust today and got a close look at the area surrounding the shift linkage. It appears the seal around the shift shaft is leaking. Don't want to drop the pan (again). Can the seal be accessed/replaced from outside?
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Old 07-16-2005, 09:54 PM   #2
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Quote:
Originally Posted by SkunkApe
...without dropping the pan? I removed my exhaust today and got a close look at the area surrounding the shift linkage. It appears the seal around the shift shaft is leaking. Don't want to drop the pan (again). Can the seal be accessed/replaced from outside?
No, you have to drop the pan to do it right. You could jam on another o-ring from the outside but I doubt it will help.
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Old 07-16-2005, 10:17 PM   #3
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Quote:
Originally Posted by markdtn
No, you have to drop the pan to do it right. You could jam on another o-ring from the outside but I doubt it will help.




Bummer...especially after I poured in a dozen quarts of TrickShift!
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Old 07-16-2005, 11:20 PM   #4
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I know that on most trannys you can replace the shift-shaft-seal easily. Never did one on my Turbo 400 though so he may be right.
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Old 07-16-2005, 11:34 PM   #5
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We have a small tool at the shop that will remove the shaft seal without dropping the pan. I think it will do 400's. Most tool jobbers (Snap-on, Matco, etc.) carry them on the truck. Better auto parts stores may also have them. G/L

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Old 07-17-2005, 12:08 AM   #6
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Just did this. there is a tool which slides over the shaft and removes the seal from the outside.
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Old 07-17-2005, 12:20 AM   #7
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YEP!
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Old 07-17-2005, 01:53 AM   #8
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Quote:
Originally Posted by 7t2vette
Just did this. there is a tool which slides over the shaft and removes the seal from the outside.

big_G
We have a small tool at the shop that will remove the shaft seal without dropping the pan. I think it will do 400's. Most tool jobbers (Snap-on, Matco, etc.) carry them on the truck. Better auto parts stores may also have them.

Is it a GM "special tool" or a generic thing that works on different seals?
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Old 07-17-2005, 08:31 AM   #9
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Dunno, took mine to a tranny shop for this.
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Old 07-17-2005, 12:27 PM   #10
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Found it in the Year One catalog...$34. Might not be worth it for a one-time use...
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Old 07-17-2005, 12:50 PM   #11
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Probably worth it if you factor the cost of the fluid you just poured. Plus you will have another tool and that's always a good thing.
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Old 07-17-2005, 01:11 PM   #12
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Quote:
Originally Posted by soggybottomboy
Probably worth it if you factor the cost of the fluid you just poured. Plus you will have another tool and that's always a good thing.

Probably not worth it to purchase the tool vs. taking it to a shop and having it done.

But, you're right. One can never have enough tools!
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Old 07-17-2005, 02:06 PM   #13
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What is the tool called? Part #?
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Old 07-17-2005, 06:31 PM   #14
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I don't have a part number for you, but I can vouch for the tool working. Try an internet search for TH400 shaft seal tool or something along those lines. It should be roughly 35-45 bucks.
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Old 07-13-2011, 08:13 AM   #15
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Originally Posted by 7t2vette View Post
Dunno, took mine to a tranny shop for this.
How much did it cost you to change the seal @ the shop? Thanks
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Old 07-13-2011, 11:55 AM   #16
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Snap-on tool PN#YA 9348 Transmission seal remover /installer.

Trans tool
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