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Drivetrain T5 Transmission Leak at Tailshaft

  • Thread starter Thread starter MDrisc
  • Start date Start date Jun 17, 2025
M

MDrisc

Member
Sep 11, 2024
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Boston
Jun 17, 2025
#1
  • Jun 17, 2025
  • #1
Noticed some transmission fluid coming out of the T5 at the tailshaft. Just got car back together. T5 is used and put aluminum driveshaft in. Seal at tailshaft doesn’t look to be in bad shape but it’s leaking out from behind that seal, into driveshaft then down onto exhaust.

Just curious who’s been down this road before. Does replacement of that seal only tend to typically fix this and how hard of a job is that with transmission still installed?

Or have a lot of people seen this one still leak after the seal and there be more too it.

Just trying to prep myself for how to fix.

Thanks,
 

General karthief

wonder how much it would cost to ship you a pair
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#2
  • Jun 17, 2025
  • #2
It's similar to a rear main seal or a timing cover crank seal, yank the driveshaft, pop the rear trans seal out, tap the new one in. I coat the yoke with trans fluid, some on the splines of the tailshaft too.
I will worn you, my mechanical skills rate as well as my spelling and grammar
 
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Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
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#3
  • Jun 17, 2025
  • #3
Which far exceed his ability to fly a helicopter.
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,916
10,566
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polk county florida
Jun 17, 2025
#4
  • Jun 17, 2025
  • #4
Noobz347 said:
Which far exceed his ability to fly a helicopter.
Click to expand...
You're still pissed about that??
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,075
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Box behind Walmart
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#5
  • Jun 17, 2025
  • #5
General karthief said:
You're still pissed about that??
Click to expand...
The Columbians were laughing at us.
 
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nickyb

I gotta say i never painted my nuts, Never Ever
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Jun 17, 2025
#6
  • Jun 17, 2025
  • #6
Take driveshaft off rear end and check the amount of play at trans. If the yoke has alot of play then just changing the rear seal in tail housing ain't gonna do.
You'll have to change the tail shaft bushing ( no fun).
 
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AeroCoupe

lube between the nut and the face. I know my lubes
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Claremore, OK
Jun 18, 2025
#7
  • Jun 18, 2025
  • #7
Tool to change the bushing is really nice to have but they are expensive. You may put a feeler out on here and see if anyone has one and will loan / rent it out.

Thread 'Need to replace the output shaft bushing on your T5? Here's the tool to get.'

Aug 17, 2008
I get stubborn on these projects. If I can't rent a specialty tool, I'll find and buy it. I don't like paying some guy to do the work for me if I can just buy the tool. I checked my local auto tool rental shops, and no one had even heard of this tool. Not even Autozone, who supposedly still carried it. After searching online for what felt like forever, I found a universal tool that works on several different transmissions including an AODE and 4R70W. I guessed it would work for a T5, and I was right. So without further adieu, here's photos of the tool.



This tool...
  • Chythar
  • Replies: 35
  • Forum: 1994 - 1995 Specific Tech

This one came up in several threads on other forums with really good reviews:

Streetside Tools SST-0160 - Extension Housing Bushing Driver / Installer and Removal Transmission Tool / Kit

Extension Housing Bushing Driver / Installer and Removal Transmission Tool / Kit
www.streetsidetools.com

Other option is to pull the housing and take it to a transmission shop and have them replace the bushing. I would call them before doing any work so you know if they just want the whole transmission or just the housing.
 
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