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Author Topic: 84 to 83 GTS rear subframe  (Read 353 times)

Offline bruiser501

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84 to 83 GTS rear subframe
« on: Jul 20, 2021, 02:51:46 am »
Opinions wanted. I'm not quite sure what to do. I have an 84 GTS LB that I'm using for parts for my 83 GTS Coupe. Is it worth it to replace the whole rear subframe to get the rear disc brakes OR just replace the arms to get the disc brakes OR just leave it alone and live with the rear drums on the 83? No I won't be putting more power, only stock 22RE in the engine and I will not be going to put it on a track. Yes, the rear ends are identical in size and gear ratio. Does the benefits outweigh the labor? I don't believe there would be any problems with the swap unless someone has some already done it tips. Thanks

Offline Sigma Projects

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Re: 84 to 83 GTS rear subframe
« Reply #1 on: Jul 20, 2021, 03:35:59 am »
You will need to change the proportioning valve as well when switching to discs in the rear. Also not entirely sure, but you might need to do something with the parking brake cables.

I think if you're going to tear down the rear suspension, freshen it up having a second set to work on and make fresh is better than having your car down. Also doesn't hurt to have a second diff around.
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Offline bruiser501

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Re: 84 to 83 GTS rear subframe
« Reply #2 on: Jul 22, 2021, 07:33:30 pm »
I have the parking brake cables and everything. I'm definitely going to keep the rear end and pull the rear subframe off the parts car.

I figured I would have more opinions on this matter tho. It may be a pain to replace it but it may be worth it. Just thought I would throw it out there to see if there are major benefits for this swap.

Offline RedCar

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Re: 84 to 83 GTS rear subframe
« Reply #3 on: Jul 22, 2021, 11:02:39 pm »
Good idea to keep those extra parts.
However, I wouldn't bother swapping just for the disc brakes.

The parking brake will still be a drum, just a less powerful one inside the disc... probably less desirable for drifting!
Front brakes do 70% of the work anyhow, so the drums are perfectly adequate for all but the most intense track use.
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