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#4129130 - 11/30/21 04:56 PM Tool to Remove Extension Housing Bushing (4R75E)?
Bigfieroman Offline
Stranger

Registered: 11/29/21
Posts: 7
Loc: PA
Hello,

My extension housing bushing (also called a tail shaft bushing) is worn out, resulting in play at the driveshaft output and a slight fluid leak. Most guidance for this issue says to remove the housing and replace the bushing, which means removing the exhaust mid pipes/O2s, e-brake cable, and transmission cross member, which I would like to avoid.

I have found some posts that mention a special tool to pull/replace the bushing from outside of the transmission, and indeed, tools like this exist for other transmissions, but after hours of research, I cannot find a tool for the AOD/AODE/4R70/4R75. Does anyone have one/know of one?

Here is an example meant for GM transmissions:

https://www.amazon.com/gp/product/B011SBI5YC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

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#4129158 - 12/01/21 07:22 AM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: Bigfieroman]
ironmarinebill64 Offline
Rookie

Registered: 01/30/21
Posts: 97
Loc: New York, USA
I've done it (slowly) by removing the driveshaft, output shaft housing, and removing the cross member. All after supporting the trans with a jack stand and wood.

I carefully used a hacksaw blade to cut through the bushing; two cuts on opposite sides. The bushing was then easily removed with a brass punch. Installation was then with a standard aluminum disc bushing tool you can get at an auto parts store or Harbor Freight. Just want to insure the new one is indexed the right way going in, as there's an oil hole.

Changing it definitely made a difference in reducing vibration at highway speed.
_________________________
2005 Lincoln Town Car Signature Limited
5.4 liter throttle body; CVPI oil cooler, intake tube & air box; Mark VIII aluminum driveshaft; Trac-Lok limited slip; Richmond Gear axle shafts; J-Mod with Sonnax valves; Limo rear control arms; ADTR 1" rear sway bar and a great sounding stereo that won't ever automatically remember my Bluetooth settings

1999 Mercury Grand Marquis (gave that to youngest son, and he's now a converted true believer)

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#4129170 - 12/01/21 10:10 AM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: ironmarinebill64]
Bigfieroman Offline
Stranger

Registered: 11/29/21
Posts: 7
Loc: PA
Yeah, that is the conventional way to do it, I am probably going to have to go that route. The tool that I referenced actually pulls the bushing out of the driveshaft hole of the transmission, no need to pull the extension housing or cross-member. If the tool doesn't exist, I will end up doing it the way you did. Thanks!

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#4129194 - 12/01/21 01:33 PM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: Bigfieroman]
Lance01 Offline
Climber

Registered: 04/02/18
Posts: 557
Loc: Pa
With all due respect, are you sure that's the issue?

I had a similar issue but it was just the tailshaft seal which was easy to replace.

If you have to replace the tailshaft bushing the main work is removing the crossmember which I have done before on the ground but it's doable.

If I were you I would buy a tailshaft with a new bushing and tailshaft seal already installed and just do a swap if that's what is really needed. No harm in installing a new transmission mount also while you're in there for an extra 20$ from Rockauto. My transmission mount was already trashed at 140k.

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#4129198 - 12/01/21 01:56 PM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: Bigfieroman]
Bigfieroman Offline
Stranger

Registered: 11/29/21
Posts: 7
Loc: PA
I am pretty sure the bushing is the issue. As mentioned, the yoke has significant play in the end of the tranny when the driveshaft is installed, and I believe that is the root cause of the leak.

My transmission mount looks to be in good shape, but if I do end up having to remove the cross member, I will likely replace it.

I am only asking about the tool because as the car sits right now with the driveshaft removed, I could replace the bushing and seal in ~10 minutes vs. however many hours the cross member and exhaust fight me coming out/going in. Just trying to save 4+ hours on my back in a 40 degree driveway if I can. That is worth $100 to me if the tool exists.

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#4129204 - 12/01/21 02:59 PM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: Bigfieroman]
Lance01 Offline
Climber

Registered: 04/02/18
Posts: 557
Loc: Pa
I have a 2004 P71. When I replaced the transmission mount which required me to pull one side of the crossmember the exhaust wasn't in the way. If I had to replace the tailshaft housing I had a clear shot.



Edited by Lance01 (12/01/21 03:01 PM)

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#4129210 - 12/01/21 05:11 PM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: Bigfieroman]
Bigfieroman Offline
Stranger

Registered: 11/29/21
Posts: 7
Loc: PA
I think I am just going to give up and drop the cross member. I will replace the mount while I am in there. Ohh well.

Thanks everyone.

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#4129226 - 12/01/21 07:35 PM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: Bigfieroman]
TheShadow Offline

Over the Hill

Registered: 05/01/07
Posts: 1836
Loc: SoCal High Desert
You could try asking around at tranny shops and the like...someone might do it for cheap...
_________________________
'95 P71, 5xx,xxx miles, Rebuilt tranny, 2.73. Lives as a cab, and will die as a cab. (Died-FrontEnder)
'96 P71, 640,xxx on original drivetrain. (Now parts car - T-bone & roll)(You should see the roof - A,B & C-pillars chopped on driver side)
New to list: '96 MGM (Nice! @ 35x,xxx), '97 CV P71, '98 CV P71, '00 CV P71, 01 P71 (2 of 'em) '03 CV P71 (Nice so far) (All Ford Zinc Yellow w/Black decals & trim) And the list is growing...........
Taxicab mechanic: I HATE DRIVERS!

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#4129290 - 12/02/21 03:00 PM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: Bigfieroman]
Bigfieroman Offline
Stranger

Registered: 11/29/21
Posts: 7
Loc: PA
I lowered the cross member but left the exhaust in place. I had enough room to remove the extension housing after pulling the tranny mount off. I replaced the mount while I was in there. Thanks everyone!

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#4129296 - 12/02/21 03:47 PM Re: Tool to Remove Extension Housing Bushing (4R75E)? [Re: Bigfieroman]
TheShadow Offline

Over the Hill

Registered: 05/01/07
Posts: 1836
Loc: SoCal High Desert
Originally Posted By Bigfieroman
... I replaced the mount while I was in there. Thanks everyone!

Smart thinking!
_________________________
'95 P71, 5xx,xxx miles, Rebuilt tranny, 2.73. Lives as a cab, and will die as a cab. (Died-FrontEnder)
'96 P71, 640,xxx on original drivetrain. (Now parts car - T-bone & roll)(You should see the roof - A,B & C-pillars chopped on driver side)
New to list: '96 MGM (Nice! @ 35x,xxx), '97 CV P71, '98 CV P71, '00 CV P71, 01 P71 (2 of 'em) '03 CV P71 (Nice so far) (All Ford Zinc Yellow w/Black decals & trim) And the list is growing...........
Taxicab mechanic: I HATE DRIVERS!

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