I have a few ideas about a homemade driveshaft loop, does anyone else? I also see that OPGI sells a loop that they say fits a TH400. I have a TH350 what would be the diffrence as far as the mounting position be. I just talked to a tech guy that sounded younger than me (31), and he said it wouldn't work on my TH350. I'm not drilling holes in my floor!!! Anyone have pics of their homemade engineering? Thanks!!

you should not have too All loops I have seen mount to the inside frame rails...

Brian

There is one at YEAR ONE part #A348. Heres the description.
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Aftermarket bolt-on driveshaft loop mounts between the transmission and the mount, and surrounds the driveshaft behind the U-joint. This black-steel loop protects the undercarriage in the event of front U-joint breakage. Instructions included.

AW348 Driveshaft loop for 1967-1972 long-shaft TH-400 A/T and 4-speed M/T models.
$52.00
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You can find a pic on their site.
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Jon N.

Here is one:

http://gallery.bcentral.com/Gallery/ProductDetails.aspx?GID=4716958&PID=844222&page=1&sortOrder=0

Won't this change your driveline angle slightly if you raise the transmission a 1/4"?

You could make it bolt to the bottom of the crossmember with the same bolts that hold the mount to the crossmember. That way the trans isn't raised up.
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Jon N.

Does anybody know if these type of driveshaft loops NHRA approved? :confused:

Originally posted by 71454Chevelle:
Does anybody know if these type of driveshaft loops NHRA approved? :confused: Can't say if it is or it isn't legal. My biggest concenn is how disasterous and intense driveshaft breakages are. I could see a broken driveshaft tearing that kind of loop out. The only thing it's bolting to is two 7/16" bolts that are threaded into a cast tail shaft housing...take a guess what will be first to break?

Also, the loop mount would be several inches forward of the loop itself which would put even more strain on the loops mount in case of driveshaft failure.

This is my opinion (may not be popular either), but if your not willing to make the required mods and do them in a safe/strong manner, then slow the car down to a point where there not required...or not run sticky tires/slicks.

That loop is leagl per the manufacturer. I have one on my Camaro. There was another post about this loop before and the maker stated that he made the first one for the Chevelle Red Alert if may failing memory serves me at this point.I searched here and at camaros.net and can't find the post. If you mounted it below the crossmember I think that you might have drive shaft interference.

What if you heated it up and bent it up in order to have the driveshaft in the center of the loop? It appears to be the same one that is sold by Year One and OPGI. Which I was told and the description says that will only fit M/T. I have never worked on or installed a M/T, what is the difference in mounting position or tail length?

I guess if you use the cheaper,trans mount loop and it don't hold up and you pole vault over on your roof, you still won't have holes in the floor,unless the driveshaft puts some there :D

Originally posted by Rapid Robert:
I guess if you use the cheaper,trans mount loop and it don't hold up and you pole vault over on your roof, you still won't have holes in the floor,unless the driveshaft puts some there :D graemlins/thumbsup.gif graemlins/waving.gif