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PostPosted:Mon Mar 10, 2014 8:03 am 
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Big Block

Joined:Thu Oct 17, 2013 7:36 pm
Posts:81
Car Details:1969 Chevrolet Camaro
I have a 1st gen with a powertrax no slip diff, some people say use normal 75w - 80 but some say 75 - 140 is better to make it run quieter, would the thicker stuff be ok to use or best stick to the thinner stuff, ive noticed a whine soubd when accelerating but its always done that since i got it so dont know if its normal, ive had the cover off and cant see any damage. No bits of metal in the oil or anything


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75w - 140 oil ok for diff?

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PostPosted:Mon Mar 10, 2014 10:33 am 
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Big Block
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Joined:Sun Jan 13, 2013 7:00 am
Posts:1158
Car Details:1986 Camaro, bought into Spain by me in 1993.
305 replaced by a 355, 750 Demon carb, RPM AirGap intake, Brodix heads, Hedman Hedders, 3" Flowmaster exhaust.
Wheels are Summit aluminium 5 spokes, tyres are 245 rear 225 front BF Goodrich.
B/M transmission, battery relocated to the rear, GoodMark 4" cowl steel hood.
Location:Spain East Coast
I have a PowerTrax too and have always used SAE 80w90.
A PowerTrax doesn´t whine just clicks.

I´m redoing my diff at the moment due to a whine on acceleration and deceleration, constant at 80mph.
I used a spacer instead of a crush sleeve and I think excessive preload on the pinion bearings is causing it.
Everything else checked out fine.


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PostPosted:Mon Mar 10, 2014 4:18 pm 
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Big Block

Joined:Thu Oct 17, 2013 7:36 pm
Posts:81
Car Details:1969 Chevrolet Camaro
Thats what minea like, if in up to speed and gently accelerate i hear the whine, i had the case off at the weekend and couldnt see any damage, i took some pics ill upload them when i get in


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PostPosted:Mon Mar 10, 2014 5:15 pm 
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Big Block
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Joined:Sun Jan 13, 2013 7:00 am
Posts:1158
Car Details:1986 Camaro, bought into Spain by me in 1993.
305 replaced by a 355, 750 Demon carb, RPM AirGap intake, Brodix heads, Hedman Hedders, 3" Flowmaster exhaust.
Wheels are Summit aluminium 5 spokes, tyres are 245 rear 225 front BF Goodrich.
B/M transmission, battery relocated to the rear, GoodMark 4" cowl steel hood.
Location:Spain East Coast
I´m afraid looking inside the diff. won´t tell you anything.
You´ll have to disassemble it and look at the bearings, even then you might not see the cause.


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PostPosted:Mon Mar 10, 2014 8:40 pm 
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Big Block

Joined:Thu Oct 17, 2013 7:36 pm
Posts:81
Car Details:1969 Chevrolet Camaro
Image
Image
Image
Image


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PostPosted:Tue Mar 11, 2014 5:52 am 
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Big Block
User avatar

Joined:Sun Jan 13, 2013 7:00 am
Posts:1158
Car Details:1986 Camaro, bought into Spain by me in 1993.
305 replaced by a 355, 750 Demon carb, RPM AirGap intake, Brodix heads, Hedman Hedders, 3" Flowmaster exhaust.
Wheels are Summit aluminium 5 spokes, tyres are 245 rear 225 front BF Goodrich.
B/M transmission, battery relocated to the rear, GoodMark 4" cowl steel hood.
Location:Spain East Coast
For some reason I cannot view the pictures.


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