Best lube to quiet down singing rear diff ??

[busfreak]

Hi guys,

- above 80 kmph at the point of loading (acceleration) and unloading (deceleration w/o using break) there is a slight singing / whining from the rear
- the same singing is present in idler neutral gear between 80 and 100 kmph (just as additional info)

I dont know if it comes from diff or it is tramsmmitted from gearbox via power train - rear axle to car body.

What is possibly the best / most successfull diff lube to try to get rid of the slight noise ?
Who has experience ?

In car manual is recommended:

temp < -30 °C SAE 80
-30 < temp < 30°C SAE 90
temp > 30 °C SAE 140 °C

temps here are between -20°C in winter and 35°C in summer.

thanks for answer

 

[dave123]

Schaeffer oil #267

 

[MolaKule]

What vehicle and transmission?

There could be quite a few causes:

It could be your tires, or pinion/ring gear contact loading, axle bearings, etc.

 

[SwampSurvivor]

Time for a rebuild

 

[busfreak]

Manual transmission 5 speed
Hyundai Grand Starex / H1 / H300
2.5 Liter Turbocharged Diesel Van
mileage: 55.000 km
tried already different synthetic diff lubes with varying results


be aware of the speed range 80 - 100 kmph, typical for all causes ?

 

[busfreak]

@ dave@123: why #267 and not #214 or #209A ?

 

[spk2000]

My grand marquis also does this and I thought it was the bearing. Starts about 60 mph and gets worse as I go faster.

 

[WiskyBadger]

My truck did this and I had to replace 3 bearings.

 

[SwampSurvivor]

My cherokee has done it on and off since I bought it - only on deceleration.

 

[tig1]

Originally Posted By: MolaKule
What vehicle and transmission?

There could be quite a few causes:

It could be your tires, or pinion/ring gear contact loading, axle bearings, etc.


+1. This more than likely is a mechanical problem, not a lube problem.

 

[nitehawk55]

Banana peels , sawdust and trade it in quick !

 

[dave123]

Originally Posted By: busfreak
@ dave@123: why #267 and not #214 or #209A ?


Have used #267 and #293 with schaeffer products most gear oil from schaeffer only in 5gal pail or drum #267 and #293 are available in qt bottles.

 

[default]

140wt or rebuild.

 

[Clevy]

Red line.
That is all

 

[salesrep]

Schaeffers 267 is 80/90 old school moly
Schaeffer Oil 293 is 75/90 new school moly
214 is 80-140
Schaeffers best #167 is pure pao plus new school moly and penetro 75-140 and straight weights
209 is straight weights petro

 

[dave123]

Originally Posted By: salesrep
Schaeffers 267 is 80/90 old school moly
Schaeffer Oil 293 is 75/90 new school moly
214 is 80-140
Schaeffers best #167 is pure pao plus new school moly and penetro 75-140 and straight weights
209 is straight weights petro


Is 214 167 or 209 available in less than 5gal pail

 

[salesrep]

none....293 75-90 is the only Schaeffers Gear oil available in quarts.

 

[busfreak]

available in quarts: http://stores.buyschaefferoil.com/-strse-Gear-Oil--Synthetic-%26-Plus/Categories.bok

#167 75W-140
#209
#209A SAE80
#239S
#239 80W-90
#293 75W-90
#740 EP 80W-140 E/A
#741 Ep 75W-90 E/A

1.) What would be generally the best quieting Schaeffers diff lube independently of container size ?
2.) What would be the most appropriate of the available quarter-bottled lubes ?

 

[tightwad]

Put a used diff in my El Camino and it had a whine only under load. Quiet when coasting. FSM says the ring and pinion are out of adjustment. Been doing it for 17 years. I'll get around to putting in my eBay gearset one of these days. Until then I'm not worried.

 

[salesrep]

Nice catch busfreak. Schaeffers itself only packages the 293 75/90 in quarts. It looks like these folks are indeed repackaging
other gear oils on their own.
Best for your question....the correct iso grade and/or one grade up. For rear end the 293 or 167 series.