Do not buy B&M flexplates
i had the same issue on my B&M 20340. i had to use a carbide to open the TC bolt hole a bit so i could get the bolts to thread into all 3 holes on the TC. i think it was mainly the 1 oval hole that needed to be made round but i opened up the other 2 a little also. would be a real PITA if you dont have a carbide bit because you dont notice it doesnt fit until the trans is bolted up and you attempt to put the bolts in.
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Launching!
Joined: Jul 2005
Posts: 267
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Like CoreyR mine is the 20340 and it's pretty much the same issue the holes aren't drilled or spaced correctly. I could get 2 in no problem then the 3rd didn't want to line up.
I spent about 2 hours messing with it and finally got the 3rd bolt to barely line up. I thought maybe I cross threaded the torque converter doing so but I backed it out and checked and it appeared fine. I think the bolt was coming up against the plate and it was just making it nearly impossible to get it.
I spent about 2 hours messing with it and finally got the 3rd bolt to barely line up. I thought maybe I cross threaded the torque converter doing so but I backed it out and checked and it appeared fine. I think the bolt was coming up against the plate and it was just making it nearly impossible to get it.
Last edited by 98 Z28; Jul 31, 2016 at 10:46 PM. Reason: Spelling error
11 Second Club
Joined: Jan 2003
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Sometimes you do get what you pay for but for the price the B&M plate is cheap insurance and much stronger than the weak factory 2000+ LS flexplates
The 98/99 LS1 cars had a stronger flexplate, near identical in appearance to the B&M, probably a bit thinner gauge, but mine had done over 70,000 miles street/track with over 500fwhp at the time. 4l60e/4400 yank, then full manual turbo 400. Never broke that flexplate.
The 98/99 LS1 cars had a stronger flexplate, near identical in appearance to the B&M, probably a bit thinner gauge, but mine had done over 70,000 miles street/track with over 500fwhp at the time. 4l60e/4400 yank, then full manual turbo 400. Never broke that flexplate.
