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- The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=37)

- - Suburban rwal (https://67-72chevytrucks.com/vboard/showthread.php?t=848640)

kwmech

11-13-2023 02:49 PM

Suburban rwal

So I upgraded axles and brakes on my 91 Suburban to a full float 14 bolt rear and a Dana 60 front. The front axle got a conversion to 3/4 ton rotors. Still have the 1/2 calipers on it. Have a 3/4 ton master (not installed yet). Issue is a spongy pedal and I'm leaning towards the RWAL dump valve not working quite right. NO bleeder on the valve. I previously had issues on my other Suburban with the same issue. I am considering removing/bypassing the dump valve. Yes everything is adjusted correctly and have bled the system thoroughly. Any thoughts?

Keith Seymore

11-13-2023 03:52 PM

Re: Suburban rwal

Deleted.

K

nvrenuf

11-13-2023 05:29 PM

Re: Suburban rwal

My '91 Blazer had RWAL, I removed it when I swapped in 1 tons.

kwmech

11-13-2023 08:39 PM

Re: Suburban rwal

Was the difference noticeable?

kwmech

11-17-2023 07:55 PM

Re: Suburban rwal

5 Attachment(s)

Made quite a difference in braking. Have a real brake pedal now. Couple of pics

kwmech

11-17-2023 07:59 PM

Re: Suburban rwal

1 Attachment(s)

Left over parts

kwmech

11-22-2023 11:19 AM

Re: Suburban rwal

May have to re-do a little bit. I think the stock combination valve is a weak link with the elimination of the dump valve. Pedal is way better, but not quite there

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