72 rear spring diff bolts
09-06-2015, 06:22 PM
#1
Melting Slicks
Thread Starter
72 rear spring diff bolts
the 4 bolts tha hold the rear spring to the diff, what grade should they be?
the ones i removed were 3 dash meaning grade 5,
but reading on net people say use grade 8...
i'm confused....
as i'm putting a new spring on to replace my saggy one, the bolts need to be slightly longer as the spring is slightly thicker thru the middle.
the ones i removed were 3 dash meaning grade 5,
but reading on net people say use grade 8...
i'm confused....
as i'm putting a new spring on to replace my saggy one, the bolts need to be slightly longer as the spring is slightly thicker thru the middle.
09-06-2015, 07:01 PM
#2
Le Mans Master
Member Since: Jul 2006
Location: charlotte north carolina
Posts: 8,117
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GM used grade 5, if you're worried, use 8's. Most important thing is to not bottom the bolt in the blind holes and crack the cover. Measure that twice!
09-06-2015, 08:03 PM
#4
Safety Car
Member Since: May 2004
Location: los altos hills california
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For sure. I looked at mine and two of them have extra washers. However with a fiberglass spring and an extra strength rear cover, your results may vary.. Just be careful.
09-06-2015, 10:05 PM
#5
Melting Slicks
Thread Starter
Had to go with grade 8 bolts as grade 5 not readily available over the counter here.
Actually pulled it all apart, then realised I needed the longer bolts,
But on Saturday all the industrial supply places are closed....
Being a fitter n turner, I tend to over analyze things.... have measured multiple times already,
And will check again when I mock install....
Actually pulled it all apart, then realised I needed the longer bolts,
But on Saturday all the industrial supply places are closed....
Being a fitter n turner, I tend to over analyze things.... have measured multiple times already,
And will check again when I mock install....
