Differential problem I think?? - JeepForum.com

 
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post #1 of 6 Old 12-25-2011, 04:58 PM Thread Starter
hdrocknroll
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Differential problem I think??

I have a whining in the rear.
I just bought this Jeep December 3, 95 grand Cherokee 4.0, I have been doing a lot of repairs.

It had a bent rear left axle, replaced axle with good junkyard axle new bearing and seal.
Before that I don't know if the rear end was whining because the left rear bearing was making so much noise.

Now I thought it might be making too much noise, whining at lower speeds, but today was first day I took it out on freeway, and when I got it up to 70 75 80 it was whining big-time, wines most as you accelerate, a lot less when you let off.
Is definitely coming from the rear not the tranny.

When I did the rear axle I checked the fluid before I opened it up and it was only slightly low, the fluid was black.
I noticed that it had been leaking some around the pinion seal. The new oil I put in was Mobil1 Synthetic Gear Lubricant LS 75W-90
.
It has the command Trac four-wheel drive, the rear end is a Dana 35C, does this require an additive?, I did not put any additive in.

So! Is my right rear bearing bad making that noise? I doubt but I thought I should ask. Or is it my pinion gear? Or other parts in the rear end? Or drive shaft u joint maybe?

From what I understand it is probably not a good idea for me to try to replace the pinion gear, so how much will it cost me to have this done?

How many miles can I drive it this way without destroying something?



Always !! Keep A Firm Grip On Your Tool !!

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Whats the worse that can happen? Your jeeps already broke.


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post #2 of 6 Old 12-26-2011, 03:04 PM Thread Starter
hdrocknroll
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I appreciate your opinions !!!!

Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


Quote:
Originally Posted by rooster51 View Post
Whats the worse that can happen? Your jeeps already broke.


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post #3 of 6 Old 12-26-2011, 08:39 PM
Nejeep
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Probably your pinion bearings if the noise changes between acceleration and decceloration. Its usually easier and less costly to replace the whole rear end than setting up new bearing loads and clearances. To bad you already spent time and money on the axle. May want to get estimates from some shops unless you want to dive into it.

06 Laredo - 4x4 V6 - Stone White - Custom LED Cargo Area Lights, Lighted Visors Added - now at 49k miles

97 Laredo - 4.0 4x4 Daily driver for 8 years then relocated to Arizona for 6 more years with the relatives
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post #4 of 6 Old 12-26-2011, 08:59 PM Thread Starter
hdrocknroll
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When you say to replace the whole rear end ,do you mean differential guts,housing,axles, the whole kit and caboodle ? Like from junk yard?
I found a couple on car part.com , from a 1998, close to my house,they are $350 and $400 ,does that sound right
How do I know what ratio mine is , it is a 35c ,but there is no tag.on it

Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


Quote:
Originally Posted by rooster51 View Post
Whats the worse that can happen? Your jeeps already broke.


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post #5 of 6 Old 12-27-2011, 07:57 AM
Nejeep
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Yes, the complete rear axle housing with internals can be swapped. The best way to determine the ratio is pulling the cover off and counting the teeth on the ring gear and pinion or reading the numbers stamped on the ring gear.

06 Laredo - 4x4 V6 - Stone White - Custom LED Cargo Area Lights, Lighted Visors Added - now at 49k miles

97 Laredo - 4.0 4x4 Daily driver for 8 years then relocated to Arizona for 6 more years with the relatives
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post #6 of 6 Old 12-27-2011, 08:59 PM Thread Starter
hdrocknroll
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Nejeep
thanks a lot

Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


Quote:
Originally Posted by rooster51 View Post
Whats the worse that can happen? Your jeeps already broke.


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