North Texas Converter Bolt pattern???!!!
Thread Starter
On The Tree
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North Texas Converter Bolt pattern???!!! I bought a North Texas Converter for my th350 and it came with a 11 1/8 center hole to hole bolt pattern. I ordered it for my 5.3ls which has a stock flexplate pattern of 11 1/2 center hole to hole. I ordered a TCI flexplate for an ls setup and it's center hole to hole pattern is 10 7/8ths. What is going on and do I need to enlarge the holes on my TCI flexplate? I paid 300 for the TCI flexplate and it should of bolted right up. PLEASE HELP me out on what I need to do
Nathan
Nathan
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Joined: Aug 2010
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From: Ann Arbor, MI
LS converters have a slightly different bolt pattern than TH350 converters. Therefore you have the wrong TCI flexplate. I don't know the correct part number, but I'm sure someone does; perhaps Chris or Brian from CircleD.
FormerVendor
Joined: Jan 2014
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Lets start off with a picture of what you are measuring. The three GM patterns are 10.75, 11.062, and 11.5.
The TCI 399753 is the LS 11.062 pattern and the smaller 10.75, and the 399754 is the 400/4l80 11.5". What flexplate part number do you have?
-Brian
The TCI 399753 is the LS 11.062 pattern and the smaller 10.75, and the 399754 is the 400/4l80 11.5". What flexplate part number do you have?
-Brian
Last edited by Circle-D_Brian; Feb 4, 2015 at 09:27 AM.