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Old 02-15-2015, 07:56 PM   #1
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1970 27' Overlander
Belmont , California
Join Date: Mar 2013
Posts: 49
Pop quiz - should I remove the old chassis tank support?

We're moving our bathroom and tanks from the rear to over the axles and putting the bedroom at the back of our 1970 overlander.

Before I put the belly pan back on I have a question for all the experts here.. Should I remove the old chassis extension that airstream added to mount the rear tank - or leave it on and belly pan around it?

I'm thinking it would save weight to remove it - there's nothing at the back that needs the extra support, right?

Or should I leave it to give the rear ended frame that extra stability?

Alex & Christina


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Old 02-15-2015, 07:57 PM   #2
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1970 27' Overlander
Belmont , California
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Here's the extra frame for the tank support that I'm talking about..

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Old 02-16-2015, 07:24 AM   #3
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1964 22' Safari
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enosburg , Vermont
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The only use I've seen for them is the extra depth, support & protection for the tank. If you're concerned with frame strength you could weld flat stock inside or outside the frame rails, same as is done where the axles attach. Other than that it would look original left as is and I suppose they may protect the bumper & belly pan on steep angle site approaches. They are useful to set your rear stabilizers on site. If it eases your mind the older ones with above floor black water tanks didn't have them. I did see one where they used that vacated space to mount there spare tire. That requires the extentions remain in place. When you make a major change in design and weight distribution remember to much weight on the tail reduces the REQUIRED tongue weight. This affects towing and can cause rear frame / body seperation. To little tongue weight she will "float". To much tongue weight will require heaver load bars that can cause stress cracks in the alum body. Most folks I know try to stay w/in 15ish % of the original specs. We're not "experts", just done a few!!!!!
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