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I am in the middle of a major repair of my 12 bolt rear end.
it's all bad! Why?
The thought the ring gear was bad last year, been making some small noise for a while when car was in coast mode. Noise was in the ring gear.
Well last season I check the drained the gear lube for inspection, all was fine, just a Richmond gear noise nothing major.
I installed CLIMBING GEAR LUBE! Moroso 34800 Gear Oil.
I went to the track a few weeks ago and noticed rear end noise was louder and on the street same result. Less than 1000 miles on car sense oil change. So I decided I would go ahead and change the gear, I want to do this to slow the car down for rules and also better street use and try to keep the car in the 7.50 range for a new heads up class in Atlanta, GA.
Upon tear down and inspection I find, Every bearing is toast, the spider gear idlers in the posi are goaled up. Had to cut the cross pin out with a gas wrench! Wheels bearing have been running dry! Axles are toast!
After further consulting with some company's! This oil should never be used in a open differential, posi or oil bath lubed bearings as in a GM c-clip rear axle. (Unless you put 3 total quarts in) Moroso denies any of this!
This oil has a high self adhesive additive (keeps the oil from slinging) that lubes the ring gear and starves the other parts of the rear end. Seems to be a known cause when talking to some differential builders.
It is also noted that other brand Climbing gear oils do not have the self adhesive additive,(keeps the oil bonded together) they have a material bonding additive, attachés to parts. The oil will separate.
The separation is what allows the oil to travel down the axle and inside the differential. In talking with some other company's that have climbing gear lube say, the Moroso oil gives the "CLIMBING" name a bad one when used in stock configured differential. The biggest problem they hear about is in the 4X4 guys.
The Moroso oil is used in "drag racing" a spool and seal axle bearing that require no lube is sufficient.
This unknown factor will cost me major repair!
All bearings, spider gears set & axles. And maybe a clutch repair in the posi unit. I will have that apart later. (have 2 other projects!)
Snake oil bits again!



Good old 85w-140 with the GM additive is what I should have been using!:yes:
:yes:
:yes:
it's all bad! Why?
The thought the ring gear was bad last year, been making some small noise for a while when car was in coast mode. Noise was in the ring gear.
Well last season I check the drained the gear lube for inspection, all was fine, just a Richmond gear noise nothing major.
I installed CLIMBING GEAR LUBE! Moroso 34800 Gear Oil.
I went to the track a few weeks ago and noticed rear end noise was louder and on the street same result. Less than 1000 miles on car sense oil change. So I decided I would go ahead and change the gear, I want to do this to slow the car down for rules and also better street use and try to keep the car in the 7.50 range for a new heads up class in Atlanta, GA.
Upon tear down and inspection I find, Every bearing is toast, the spider gear idlers in the posi are goaled up. Had to cut the cross pin out with a gas wrench! Wheels bearing have been running dry! Axles are toast!
After further consulting with some company's! This oil should never be used in a open differential, posi or oil bath lubed bearings as in a GM c-clip rear axle. (Unless you put 3 total quarts in) Moroso denies any of this!
This oil has a high self adhesive additive (keeps the oil from slinging) that lubes the ring gear and starves the other parts of the rear end. Seems to be a known cause when talking to some differential builders.
It is also noted that other brand Climbing gear oils do not have the self adhesive additive,(keeps the oil bonded together) they have a material bonding additive, attachés to parts. The oil will separate.
The separation is what allows the oil to travel down the axle and inside the differential. In talking with some other company's that have climbing gear lube say, the Moroso oil gives the "CLIMBING" name a bad one when used in stock configured differential. The biggest problem they hear about is in the 4X4 guys.
The Moroso oil is used in "drag racing" a spool and seal axle bearing that require no lube is sufficient.
This unknown factor will cost me major repair!
All bearings, spider gears set & axles. And maybe a clutch repair in the posi unit. I will have that apart later. (have 2 other projects!)
Snake oil bits again!
Good old 85w-140 with the GM additive is what I should have been using!:yes: