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Cotton or Kevlar Bands - Identification Question

Posted: Tue Aug 15, 2023 9:41 pm
by Boaski
I pulled the transmission cover off tonight. I noticed some fibers in the screen.
IMG_0520 (1).jpg
The band around the brake drum looks a little fuzzy
IMG_0519 (1).jpg
Here's my stupid question for the day: how can I tell if the bands are lined with cotton or Kevlar?

Re: Cotton or Kevlar Bands - Identification Question

Posted: Tue Aug 15, 2023 9:49 pm
by Scott_Conger
Personally, I think they look like a pretty old version of early Kevlar

oily cotton will burn, while kevlar will smoke and curl...don't inhale the fumes! You could pull some fuzz free and see how it reacts. As to what you do next, I don't think would be prudent to speculate on such little info.

Good luck.

Re: Cotton or Kevlar Bands - Identification Question

Posted: Tue Aug 15, 2023 10:03 pm
by Steve Jelf
Kevlar is more yellowish than cotton. Lots of fuzz in the screen, whichever kind it is, would prompt me to inspect the drums very carefully.

Re: Cotton or Kevlar Bands - Identification Question

Posted: Tue Aug 15, 2023 11:21 pm
by Allan
they look like Kevlar to me too. From the crush on the band ear spring, it looks like the brake drum/band linings are well worn. The fraying along the side of the band can occur when there is a mismatch between the diameters of the drum and the driven plate, but yours looks OK from the little bit that shows in your photo.
Allan from down under.

Re: Cotton or Kevlar Bands - Identification Question

Posted: Wed Aug 16, 2023 9:32 pm
by Boaski
My guess is they're whatever was sold by Mac's back in '79 as there are a pile of hand written receipts from them in the stuff I got with the car. I can't read most of them as the ink has faded. I'm hoping to limp the car along through the rest of the summer and then tie into the bigger projects over the winter.

Re: Cotton or Kevlar Bands - Identification Question

Posted: Wed Aug 16, 2023 9:53 pm
by Scott_Conger
Just monitor your transmission screen and pedal height. They will keep you well informed!

have fun and be safe

Re: Cotton or Kevlar Bands - Identification Question

Posted: Thu Aug 17, 2023 12:21 am
by TRDxB2
The transmission screen comes with a magnet - did you install it somewhere or did it dissolve amongst the fibers?

Re: Cotton or Kevlar Bands - Identification Question

Posted: Thu Aug 17, 2023 9:19 pm
by Boaski
The magnet seems to have disappeared before I got the car. I bought another one from Lang's and installed it yesterday.