| [GMCnet] 3.21 to 1 Final Drive Pinion Seals [message #200295] |
Fri, 01 March 2013 20:35  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
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Senior Member |
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Ken,
You can download the 3.21 to 1 manual here:
http://www.bdub.net/manuals/1967_Toronado_3.21_Planetary_Final_Drive.pdf
Turn to page 3EC-18 and check step:
19. Install seals into bearing housing as shown in Fig. 3EC-51.
The seal facing the tranny is installed with the spring towards the tranny and the seal facing the final drive is installed with the
spring facing the final drive.
There is no mention of any weep holes in the seals or the housing.
Figure 3EC-53 shows a "vent pin."
If you haven't already done so I would suggest giving John Biwersi a call before you re-install the final drive, I'm sure he'd
clarify anything you need to know about the 3.21. He walked JohnS and me through the inspection procedure step by step.
I'll send you his telephone number off net.
Regards,
Rob
From: Ken Henderson
Stick and I removed the 3.21 FD from his coach today to replace the back-to-back seals, which I thought was the source of his ATF
leak. It turned out that the top portion of the FD/Transmission gasket was in bad shape but the seal looked perfect (well centered,
resilient rubber, and no side play on pinion shaft). So I've decided against fixing sumthin' that ain't broke. We'll install with
the new gasket tomorrow and HOPE. I haven't yet found the weep hole for those back-to-back seals, so I really don't know where his
leak was from. We may have not accomplished anything.
:-(
Ken
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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