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chassis shortening?

General Tech Talk

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chassis shortening?

Post by mud4b »

ok im not vselling the sierra now.so does anyone know if i can move the rear diff back then chop off the chassis behind the diff legally?
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Post by greg »

I'm aware of a few lwb sierras that have had this modification done to them - one of which is getting engineered (i.e. currently working under consultation with an engineer)... So i'm pretty sure it can be done legally.

I think the norm is to cut the chassis off just behind the rear shackle hangers.
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Post by mud4b »

thats all good but i dont have shackel hangers...

what im planning on doing is moving the rear diff back(a-arm)then chop the chassis,then run tube from there up to the tube tray.
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Post by Fathillbilly »

you don't need an engineers certificate if you dont touch the rear cross member

but you do if you want to move modify or change the rear X-member in any way

hope this helps
[quote="COOP"] By the way Mr engineering Guru maybe you better get another calculator or learn how to use it![/quote]
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Post by OVERKILL ENG »

As a GENERAL rule that our engineer has told us 3/4 of the original chassis must be retained. As I said General so others may have a different oppinion this is just what I have been told.
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