Tech Talk & Articles > GM Cars
Rear Disc Brake Conversion Kit - 1977 Transam
reba396:
Have you tried dave at ponti world
1977 Transam:
Yeah had a look a couple of months ago but am after a performance braking package with drilled and slotted disc's and 4 pistons.
bonnevista:
--- Quote from: 1977 Transam on March 11, 2015, 08:10:35 AM ---I know Leigh. It's very odd.
I've been searching everywhere for the answer. Two suppliers gave me the option of 2.75" or 2.81".
I found this on the net...........
http://www.crankshaftcoalition.com/wiki/images/thumb/a/a7/Rear_end_axle_flange_id.jpg/800px-Rear_end_axle_flange_id.jpg
No info on the offset though.
Didn't think upgrading brakes would be so difficult.
One thing is for sure, companies sell their brake upgrade kits noting it's for a specific model, but when you want to buy it they ask you to double check the measurements.
Why promote a part for a vehicle if they don't know if it's going to fit. And to top it off they know nothing about the vehicle they are selling parts for.
You would think they have a listing of the offsets if they are going to ask the question.
The first company that can confidently provide me with info on a brake upgrade install on my car will get the sale.
I'm fed up with it now.
--- End quote ---
Rebuild your drums using quality parts, they'll work fine.
1977 Transam:
I will buy shoes and cylinders for the original drum setup and see how we go.
Do you think after 38 years the internal components like the springs will need replacing?
bonnevista:
I've put 212,000 miles on my barge in the last 13 years. The only thing I've replaced are the self adjusters and (of course) a few sets of brake shoes and they work well. Having said that, all the stuff is available to rebuild them 'like new', so it wouldn't hurt.
I'm only speaking from my experience, but I think the biggest problem drum brakes have in our sort of car is lack of use. There's a lot of moving parts in drum brakes and they need to be moved regularly.
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