I think..... I had a set of 4.10's put in about a year or so ago.....I had to take it back to the people who installed the gears, because the rear differential was leaking.... Ok so tonight... me and my brother are riding and I floor it from 25.... I get a really good downshift... Something didnt feel right... Then I started hearing this whirling sound.... I got back to my house and we smelled a burning plastic smell..... I check the inside and made sure a cigerette didnt burn anything and it wasnt that.... The exhaust smells fine... then I get under the trunk and it seems that theres differntial fluid all on the frontside and input shaft(or whatever that it) of the differential.... Please tell me my rear end isnt about to go????????

 

ttt..

 

Lets say my rearend is screwed!!

Would part number PGR505 fit directly into my truck??

http://www.strangeengineering.net/catalog/index.html

 

sounds like it could be a leaking pinion seal

 

Yeah but whats the whistling noise and burning smell coming from????

 

lack of fluid?

 

Sounds like a bad pinion bearing, it can happen from fluid starvation or improperly set preload on the bearing, if this is the case the leak was probably caused by the bearing getting so hot that it burned the seal out

I had a pinion bearing go out on the 12-bolt in my 69 Nova once...it did EXACTLY what you described is happening (whistling, burnt smell, fluid all over the front of the housing by the pinion)

you *might* be able to tell if it's the pinion bearing by disconnecting the driveshaft and using a prybar to rock the pinion back and forth (if you can move the pinion even a little bit you've got a problem)...this trick doesn't always work because the pinion race is pretty tight and sometimes even a bad bearing won't move

Good luck........Oh, and can we call a truce ???

 

Yeah.... Sorry man.... thanks for all the advice.... I am taking it to the people who installed the gears and have them fix it...... I let you know how it goes....

 

They installed the new bearings and all..... They should fix the problem right???

 

It should...assuming the pinion bearing preload is set correctly and the pinion shaft wasn't galled by the overheating

your posts were only a little over 2hrs apart.....WHERE did you find a shop that'd do that kind of work in only 2 hrs (every time I take something to a driveline shop it sits 2 weeks before they even LOOK at it...I'm jealous)