Marathon Rear End Grinding

jonnymoon5 · 06-19-2011, 08:21 PM

Whenever i drive there is a loud grinding sound from the rear end. I'm not sure if its coming from the differential or from a bad bearing in the rear end.
-Jm5

Wynelocked · 06-19-2011, 09:31 PM

Had that same problem on a Limo.Turned out to be two bearings on top the rear drive.Had a shop fix it...they had it in 1000 parts scattered over the floor.Cost the customer $400.00 to fix it.Bearings were like $40.00.

jonnymoon5 · 06-20-2011, 09:32 AM

how do i get to the drive to replace it? and do i need any specialty tools to do it?

scottyb · 06-20-2011, 09:40 AM

There are basically 3 pr of bearings in the housing. It sounds to me like he is referring to the input shaft bearings. The input shaft is available with new bearings pressed onto the shaft... it can be accessed by removing the motor and removed with a pr of snap ring pliers.

The noise as you describe can come from a gear or bearing. Guessing at whats wrong and throwing parts in the differential can get expensive.

Sounds like some more investigation is needed.

jonnymoon5 · 06-21-2011, 09:40 PM

i'll try to get a video of it to get the sound tomorrow if that could help

06-19-2011, 08:21 PM	#1
jonnymoon5 Getting Wild Join Date: Jul 2009 Location: New Jersey Posts: 120	Marathon Rear End Grinding Whenever i drive there is a loud grinding sound from the rear end. I'm not sure if its coming from the differential or from a bad bearing in the rear end. -Jm5

06-19-2011, 09:31 PM	#2
Wynelocked Gone Wild Join Date: Jun 2008 Location: New Braunfels,Texas Posts: 235	Re: Marathon Rear End Grinding Had that same problem on a Limo.Turned out to be two bearings on top the rear drive.Had a shop fix it...they had it in 1000 parts scattered over the floor.Cost the customer $400.00 to fix it.Bearings were like $40.00.

06-20-2011, 09:32 AM	#3
jonnymoon5 Getting Wild Join Date: Jul 2009 Location: New Jersey Posts: 120	Re: Marathon Rear End Grinding how do i get to the drive to replace it? and do i need any specialty tools to do it?

06-20-2011, 09:40 AM	#4
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,406	Re: Marathon Rear End Grinding There are basically 3 pr of bearings in the housing. It sounds to me like he is referring to the input shaft bearings. The input shaft is available with new bearings pressed onto the shaft... it can be accessed by removing the motor and removed with a pr of snap ring pliers. The noise as you describe can come from a gear or bearing. Guessing at whats wrong and throwing parts in the differential can get expensive. Sounds like some more investigation is needed.

06-21-2011, 09:40 PM	#5
jonnymoon5 Getting Wild Join Date: Jul 2009 Location: New Jersey Posts: 120	Re: Marathon Rear End Grinding i'll try to get a video of it to get the sound tomorrow if that could help

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