Trans Mount Spacers

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Frankenchevy

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PrairieDrifter said:
Don't know if I worded it wrong but I meant the crossmember is always on the bottom of the frame. I was trying to explain the order, like exactly how it looks in the OP's original pic.

This is true, I've personally never seen a truck with crossmember mounted on top of the bottom frame rail, so I can't speak on that, but I believe you. I just didn't think that would be an issue as it would be less than a 1/2 inch difference.
Click to expand...
Maybe I’m extra confused what you meant. I was saying the crossmember IS under the frame...
 
PrairieDrifter

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Frankenchevy said:
Maybe I’m extra confused what you meant. I was saying the crossmember IS under the frame...
Click to expand...
Yes lol this is what I'm saying as well:anitoof: I think we're on the same page lol. It's just hard to explain the order of the hardware:rotflmao:
 
Doppleganger

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I'm guessing its been out at some time since the spacers were underneath on one side and above on the other. Its an 85, 208/700. Its been really cobbed which is what I'm also trying to undo.

No idea where the copper nuts came from but think I'm going back to G8 steel.

Thanks fellas.
 
bucket

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I don't know where the factory placed the spacers and it might have varied. But really it doesn't matter, as long as the spacers are used and they are not between the frame and the crossmember. They will still do their job if they are mounted below everything or on top of everything.
 
Doppleganger

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FWIW.....looks like those spacers are the same as the ones on the steering box.

The copper nuts thing is still too weird.
 
eskimomann209

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I heard from wizards of old... and maybe he was a blowing the smoke but....
He said those spacers were used so GM could use the same length bolt in multiple locations. Rather than stocking multiple lengths they just had spacers.

Edited Typo


Also added

Id toss the crusty bolts and buy the correct length grade 8 bolts washers and Nylock.
 
Last edited:
bucket

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eskimomann209 said:
I heard from wizards of old... and maybe he was a blowing the smoke but....
He said those spacers were used so GM could use the same length bolt in multiple locations. Rather than stocking multiple lengths they just had spacers.

Edited Typo


Also added

Id toss the crusty bolts and buy the correct length grade 8 bolts washers and Nylock.
Click to expand...

It's because longer bolts have more room to stretch without breaking. If short bolts were used to hold the crossmember to the frame, which sees a lot of load and torsional flex, they would be more likely to break or loosen.
 
skysurfer

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bucket said:
I don't know where the factory placed the spacers and it might have varied. But really it doesn't matter, as long as the spacers are used and they are not between the frame and the crossmember.
Click to expand...

There's one exception to that rule. When installing a 4" lift the instructions tell you to move the spacers up as shown.

You must be registered for see images attach
 
bucket

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skysurfer said:
There's one exception to that rule. When installing a 4" lift the instructions tell you to move the spacers up as shown.

You must be registered for see images attach
Click to expand...

That is true. I didn't mention it though because it's my personal nitpicky opinion that it's not the best way to do it. I'd much rather see a block of some kind to give better support due to frame flex.
 
K10farmtruck

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bucket said:
It's because longer bolts have more room to stretch without breaking. If short bolts were used to hold the crossmember to the frame, which sees a lot of load and torsional flex, they would be more likely to break or loosen.
Click to expand...
Yup. Pretty common on diesel exhaust manifolds as well to handle the extreme heat cycles
 
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