Rear end drain plug
Thread Starter
Le Mans Master
Joined: Jul 2009
Posts: 6,381
Likes: 66
From: SF bay area C.A.
C4 of the Year Finalist
Rear end drain plug
went to change my rearend grease and noticed the drain plug is not all the way in but it is tight, took it off cleaned the threads and still only goes in a little more than half the way. Is this normal?
Le Mans Master
Joined: Feb 1999
Posts: 6,470
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From: levittown pa. usa Even a bad day with my `Vette, is better than a good day at work
St. Jude Donor '10
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
C4 diffs never had a separate drain plug. Gear oil has to be sucked out through the fill plug hole.
The accessory catalogs used to have a drain plug kit that required drilling a hole in the bottom of the carrier but you had to be real careful where you drilled. If you weren't nearly perfect in measuring, you could hit the ring gear or not be able to get the plug inserted far enough to seal properly.
$3.50 plastic fluid pump from Harbor Freight works to suck old fluid out and pump new stuff in.
The accessory catalogs used to have a drain plug kit that required drilling a hole in the bottom of the carrier but you had to be real careful where you drilled. If you weren't nearly perfect in measuring, you could hit the ring gear or not be able to get the plug inserted far enough to seal properly.
$3.50 plastic fluid pump from Harbor Freight works to suck old fluid out and pump new stuff in.
