rear g/box oil seal, does the tail shaft make the seal?

Engines, Transmissions & Final Drive questions and answers

Moderators: timk, Stu, zombie, Andrew, The American, Lokiel, -alex, miata, StanTheMan, greenMachine, ManiacLachy, Daffy

Jace
Racing Driver
Posts: 661
Joined: Fri Oct 24, 2008 7:47 pm
Vehicle: NA6
Location: Geelong

rear g/box oil seal, does the tail shaft make the seal?

Postby Jace » Fri Apr 20, 2012 5:33 pm

box is currently on the floor ready to go back in, with a new clutch bolted up, rear main and g/box front oil seal installed.

when i pulled the tailshaft, a small amount of fluid came out of the center of the hollow stub of the shaft itself.

now i've drained and re-filled the gearbox oil, and as soon as the rear of the box is even 1cm off the ground, oil pours out.

i ran down and bought a new seal that appears to be different to the one that's in there.

the installed seal looks like this
Image

is the tailshaft supposed to form the seal once installed? or is my rear oil seal just plain toast?

thanks!
- jace

User avatar
wozzah1975
Fast Driver
Posts: 336
Joined: Sun Oct 30, 2011 11:39 pm

Re: rear g/box oil seal, does the tail shaft make the seal?

Postby wozzah1975 » Fri Apr 20, 2012 5:38 pm

Jace wrote:box is currently on the floor ready to go back in, with a new clutch bolted up, rear main and g/box front oil seal installed.

when i pulled the tailshaft, a small amount of fluid came out of the center of the hollow stub of the shaft itself.

now i've drained and re-filled the gearbox oil, and as soon as the rear of the box is even 1cm off the ground, oil pours out.

i ran down and bought a new seal that appears to be different to the one that's in there.

the installed seal looks like this
Image

is the tailshaft supposed to form the seal once installed? or is my rear oil seal just plain toast?

thanks!
- jace



Tail shaft seals it bud,

Woz
BP DOHC Mk1 Escort race car. Big Valve head, Cosworth Cams, Spool Rods, Nissan Pistons
www.facebook.com/pages/Warren-Heath-Per ... 4779879292

User avatar
Beelzeboss
Fast Driver
Posts: 323
Joined: Tue May 03, 2011 3:59 pm
Vehicle: Non MX-5
Location: Sydney
Contact:

Re: rear g/box oil seal, does the tail shaft make the seal?

Postby Beelzeboss » Fri Apr 20, 2012 5:39 pm

Yeah, the tail shaft forms the seal. Without it all the oil will just run freely out the back of the gearbox.
Andrew
Image
NA-6 2.5 KL V6
http://barberprecision.com.au/

Jace
Racing Driver
Posts: 661
Joined: Fri Oct 24, 2008 7:47 pm
Vehicle: NA6
Location: Geelong

Re: rear g/box oil seal, does the tail shaft make the seal?

Postby Jace » Fri Apr 20, 2012 5:43 pm

that seems really weird to me, but that's a relief!

thanks a bunch guys, i really appreciate it! :beer: :beer:


Return to “MX5 Engines, Transmission & Final Drive”

Who is online

Users browsing this forum: No registered users and 143 guests