Author Topic: Diff overhaul  (Read 4653 times)

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Offline mention1

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Diff overhaul
« on: May 31, 2016, 08:56:04 PM »
Hi everyone,
I've had 2 mechanics now suggest I have a diff overhaul, as it has a whine in it.

I went to the local expert and he said it would cost $1,000 - $1,100. This is with the diff still attached to the car.

I can change oil and brake pads etc but this is a bit beyond me. My question is does this price sound about right?

1979 model. 350ci manual box with 3.36 axle (GV4)

Offline bfit

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Re: Diff overhaul
« Reply #1 on: May 31, 2016, 09:20:59 PM »
A 3.36 should not whine , in most cases.
 the ratios in the 3.9 /4.11 will whine generally
Having said that, a whine does not mean you need to get is out and rebuilt .
Unfortunately it's difficult to change the oil in a c3 did that is not modified to allow it to be drained.
So it's hard to know if the diff is throwing up some metal
IE on the way out .

Are you saying they can rebuild the diff in the car,
It's just not  an in frame job.
It's a two to three hours job to get the diff out.
To build the diff you can spend a day or two to get it correct .
Im a week into the 12 bolt I'm building at the moment.
If you remove the diff , and take it to a shop a $1000 may get it done but I doubt  it.
Bfit
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Offline rosco

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Re: Diff overhaul
« Reply #2 on: June 01, 2016, 07:33:01 AM »
Give award diff a call at Seven Hills very good and have worked on quite few of late.
$1100 sounds a  pretty good price if it's still in the car.

Rosco

Offline bfit

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Re: Diff overhaul
« Reply #3 on: June 01, 2016, 04:44:28 PM »
if your interested , there is a diff on gumtree for $400 at the moment
Bfit
I have seen too many instances where people continue to pursue wrong courses of action because they do not take the time to think critically about what has happened in the past.’’
Winston Churchill