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Re: [GMCnet] 3.21 final drive? and tranny SN [message #287601]

Sun, 20 September 2015 00:55

BobDunahugh

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Registered: October 2010
Location: Cedar Rapids, IA

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Skip. Just a thought. I'm interested in how you got the RTV on so you didn't plug the final drive vent holes in the case, and cover?

Bob Dunahugh78 GMC convertible78 GMC hard top
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Re: [GMCnet] 3.21 final drive? and tranny SN [message #287608 is a reply to message #287601]

Sun, 20 September 2015 07:57

skip2

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Registered: September 2011
Location: Winter Haven,FL (center o...

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I looked fpr vent holes and saw none, RTV was what was on it when I took it apart.
Skip

74 Canyon Lands, FiTech, 3.7 FD LSD, Manny Tranny, Springfield Distributor, 2001 Chevy Tracker Ragtop Towd

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Re: [GMCnet] 3.21 final drive? and tranny SN [message #287610 is a reply to message #287601]

Sun, 20 September 2015 08:10

roy1

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Registered: July 2004
Location: Minden nevada

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BobDunahugh wrote on Sat, 19 September 2015 22:55

Skip. Just a thought. I'm interested in how you got the RTV on so you didn't plug the final drive vent holes in the case, and cover?

Bob Dunahugh78 GMC convertible78 GMC hard top
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From what I remember the 3:21 did not have vent holes in the gasket. When I ran a 3:21 I put a 1/4" copper vent line in the cover.

Roy Keen Minden,NV 76 X Glenbrook

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Re: [GMCnet] 3.21 final drive? and tranny SN [message #287654 is a reply to message #287610]

Sun, 20 September 2015 21:41

Larry

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Registered: January 2004
Location: Menomonie, WI

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roy1 wrote on Sun, 20 September 2015 08:10

BobDunahugh wrote on Sat, 19 September 2015 22:55
Skip. Just a thought. I'm interested in how you got the RTV on so you didn't plug the final drive vent holes in the case, and cover?

Bob Dunahugh78 GMC convertible78 GMC hard top
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From what I remember the 3:21 did not have vent holes in the gasket. When I ran a 3:21 I put a 1/4" copper vent line in the cover.

See this for vent info for the 3.21.

http://www.gmcmhphotos.com/photos/fd-visual-differences307-vs-321/p16034.html

Larry

78 Royale w/500 Caddy
Menomonie, WI.

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