My Willys 3A and 3B Community

3A, 3B, DJ Technical Knowledge Base => "Original"-- Technical Questions, Answers, Observations => Topic started by: bayo500 on August 18, 2011, 07:29:50 PM

Title: Front pinion seal replacement
Post by: bayo500 on August 18, 2011, 07:29:50 PM
Hi, i want to change the  pinion seal on the front axle assy. if i undo the nut to remove the flange does it upset any pre-load or am i OK to just replace it and retension the nut. Steve in Australia.
Title: Re: Front pinion seal replacement
Post by: jamesr on August 19, 2011, 11:00:54 AM
Good to go.  Jim
Title: Re: Front pinion seal replacement
Post by: JeepsterJim on August 19, 2011, 05:57:05 PM
When I worked for a 4x4 shop years ago, the owner, who was a willys "Jeep" mechanic,  made us use a center punch and mark the pinion shaft, the nut, and even the yoke so ALL parts could be assemble as was.  We would have to count how many revelutions it took to remove the nut. Once the seal was replaced, the yoke put back on, we once again had to count the nut as we threaded it back on.  Also, he would have us put a little gasket sealer on the pinion shaft spline and yoke spline when putting the yoke back in place.  The sealer was used to keep oil from coming out of the shaft/yoke.

Nuts huh?  ::)   But I never had a come back. :)

Jim
Title: Re: Front pinion seal replacement
Post by: rocketeer on August 19, 2011, 08:40:47 PM
Marking and counting is only necessary when a crush sleeve is involved which these flat fenders don't have. A sealer on the splines is important. When you remove the yoke check it for wear. If there's a groove worn in it from the old seal it's likely a new seal will leak. In that case there are two ways to go, a speedi-sleeve or a new yoke.

Larry
Title: Re: Front pinion seal replacement
Post by: bayo500 on August 20, 2011, 08:19:38 PM
Thanks fellas, all info is good, sealer on the splines seems to stop most leaks on this jeep, i could have an oil free driveway any year now....