Bell to trans bolts. Grade 5 or 8 ?

[ValiantOne]

Went through the bolt pile tonight and came up with four 7/16X14 grade 5 bolts of the proper length to mate my bell to the O/D trans.

Is grade 5 ok or do I really need grade 8.

Thanks

CE

 

[ssba]

5 is good.

 

[70DSTR]

I just went out and checked mine. The bottom 2 are grade 5 (3 lines) but I can't see the top ones. I have 535 ft-lbs of torque and launch at the dragstrip at 4000 rpm with drag radials so I think you're good!

 

[Abodybomber]

Sometimes grade 5 ,is better than grade 8. This is one of those times. The higher a "grade bolt rating" goes up, tensile rating /hardness , gives up duration of lifespan, in trade for longevity. Not the proper analytics answer, it does exist.

 

[67Dart273]

There are actually very few bolts in an engine which are high strength, IE more than grade 5

I guess the rod bolts are, the main bolts. Probably the head bolts, and the flywheel bolts

 

[ValiantOne]

Thanks all. Two of the bolts came from a baggie I had marked "bell housing and starter" so I was hoping I was good. They're even all Chrysler bolts.

 

[69_340_GTS]

In areas like that it doesn't matter what grade you use. Grade 5 is way more than adequate. They don't get torqued very high and the engine block or the bellhousing will break long before any of those bolts will.