57 3100 4-speed Disc Brakes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Ghetto Fireman** · 03-04-2018, 11:08 AM

Hello All:

I have a 1957 3100 with 4-speed manual transmission. I’m adding a drop axle from SIDS along with 2 1/2” dropped front leaf springs. Planned on upgrading to discs up front but I’m finding out that the kits available won’t work with a four speed manual ? Does anyone know a solution to this? Can I go with a non- booster master cylinder? It’s my understanding that the 4-speed transmission cross member interferes with the frame mounted master cylinder. Anyone done this conversion?

Thanks

Mike

03-04-2018, 11:08 AM	#1
Ghetto Fireman Junior Member Join Date: Oct 2014 Location: Venice, California Posts: 59	57 3100 4-speed Disc Brakes Hello All: I have a 1957 3100 with 4-speed manual transmission. I’m adding a drop axle from SIDS along with 2 1/2” dropped front leaf springs. Planned on upgrading to discs up front but I’m finding out that the kits available won’t work with a four speed manual ? Does anyone know a solution to this? Can I go with a non- booster master cylinder? It’s my understanding that the 4-speed transmission cross member interferes with the frame mounted master cylinder. Anyone done this conversion? Thanks Mike Last edited by Ghetto Fireman; 03-04-2018 at 03:09 PM.



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