Beware OPGI Transmission Cooler Lines

The lines sold for 1963 & 64 Cadillacs are NOT good on all cars.  Specifically, they do NOT fit Series 62 or 75 vehicles. 

The lines they sell have threaded ends/screws on both ends.  Refer to your shop manuals and you will see this is NOT the correct fitting for the transmission ends.  A complicated setup involving beaded tube endings and sleeves with O-rings connected by rubber hose & clamps is required.

After two lengthly phone conversations with customer service it turns out nobody there knows this about the cars or their products.  They are also unwilling to process satisfactory returns—you will still be out $45 shipping to you plus an additional $45 shipping to return them (!).  $90 cash loss on your part for their error.  I tried to post some of this info on their website but it turns out OPGI suppresses negative reviews of their products.  So you won't see the heads up there.

For correct lines in stainless steel costing $20 less than OPGI, order from Inline tube in Shelby Township, Michigan.  Here is link to CORRECT part:

Good luck.

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Comment by Roland Moser on March 5, 2018 at 3:54pm

i got my new transmission lines from with the hose bead ends at the trans part# CAT6301 (Hydramatic trans). does someone have a pic how these lines ar routed respectively where they are clamped to the frame or motor?

Comment by Russ Austin on May 22, 2015 at 10:33am

That cant be the end of the story with OPGI. Have you tried talking to a supervisor?  I agree that you shouldn't have to pay shipping on their mistake.  Hopefully you paid with a credit card, so you can dispute the purchase.

Comment by Jason Edge on May 22, 2015 at 10:31am

Turbo Hydramatics had a metal line from transmission to radiator. Hydramatics had short hoses a few inches long with tower clamps before reaching the transmission. These are often so chopped up it is hard to tell what was original. The picture below shows the one correct setup (top left), and then one that had just been spliced with rubber hoses.

The THM lines can be used, but you have to cut them back a few inches back from the transmission so you can install the rubber hoses. I remember me and CLC Chief judge Bill Anderson having this conversation some time back on a car he was restoring and he cut the THM lines and he flanged the end. 

The 2nd picture shows two RH Hydramatic lines I had on hand a while back. I think I am out of the LH lines.  


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