K1500 JB5 to JB7 upgrade brake parts

[Schurkey]

Hydroboost on a C1500 ? hrmmm

Fairly certain that hydroboost was used on diesel 1500s.

 

[jess t]

"Upgrade the rear brakes to the 11.x Duo-Servo units instead of that craptastic 254mm Leading-Trailing shoe system"

Been looking at doing this too, BUT does this NOT require replacing the axle housing to one with the correct ends? I have a 90 454SS 14 bolt rear end under my 91 C1500 2WD and DO NOT want to get rid of it. It has the truck's original crappy leading/trailing brakes on it now. From what I have read on this website, the backing plate flanges on the differential were determined by the brake system ordered with the truck, is this not correct? jess in ky

 

[Supercharged111]

I waffle back and forth on Hydroboost upgrades. Hydroboost is more-powerful, but it also "feels" weird to me. Maybe that's just the two or three vehicles I've driven (and only one I've owned) with Hydroboost, compared to thousands I've driven with vacuum boost.

The JN3 booster is total crap. The JN/JB5 or 6 vacuum booster seems much more robust.

JB5/6 booster, left. JN3 "pancake" booster, right.

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Is your 2500 hydroboosted? I'll say the 1500 feels different than before, but not weird to me. Weird to me is when a HB is on the fritz and has that lag and grab.

Hydroboost on a C1500 ? hrmmm

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And the diesel 1500 trucks I've seen were all HB, 4L80, and 14BSF.

 

[RacerM95]

@Schurkey I was more thinking out loud... I have all the parts for HB from a 1ton... Pondering the swap.

 

[Schurkey]

Been looking at doing this too, BUT does this NOT require replacing the axle housing to one with the correct ends?... ...From what I have read on this website, the backing plate flanges on the differential were determined by the brake system ordered with the truck, is this not correct?

That's probably correct. And a damn shame.

Is your 2500 hydroboosted?

Yes. JD7.

And the diesel 1500 trucks I've seen were all HB, 4L80, and 14BSF.

The second 9.5" axle I bought came from a diesel 1500. 11.x rear brakes. Considering going back for the hydroboost. Downside is that the spider and side gears were totaled.

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That's also the truck my dashboard HVAC controller came from.

4L80E? I'd better check on that. Maybe I didn't get it because it's already missing. I can't remember.

 

[Supercharged111]

That's probably correct. And a damn shame.


Yes. JD7.


The second 9.5" axle I bought came from a diesel 1500. 11.x rear brakes. Considering going back for the hydroboost. Downside is that the spider and side gears were totaled.

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That's also the truck my dashboard HVAC controller came from.

4L80E? I'd better check on that. Maybe I didn't get it because it's already missing. I can't remember.

Way back in 2009 you could still get side/spider gears and cross shaft from AAM for an open diff.

 

[Schurkey]

Yeah...but if I'm gonna put money in that axle, it's getting a not-open differential. Put a Truetrac in the 10.5 in the '97 K2500. Mostly I just bought the second 9.5 'cause the price was right. It's the wrong gear ratio for my '88 K1500.

 

[Supercharged111]

Yeah...but if I'm gonna put money in that axle, it's getting a not-open differential. Put a Truetrac in the 10.5 in the '97 K2500. Mostly I just bought the second 9.5 'cause the price was right. It's the wrong gear ratio for my '88 K1500.

You had a chance to put that Truetrac to work in the snow this year? My dually's G80 is hammered.

 

[Schurkey]

You had a chance to put that Truetrac to work in the snow this year? My dually's G80 is hammered.

Not in any meaningful way. It's only been in the last week--ten days that it's gotten below zero. It's like we're not going to have winter this year.

God bless "global warming".

 

[Supercharged111]

Not in any meaningful way. It's only been in the last week--ten days that it's gotten below zero. It's like we're not going to have winter this year.

God bless "global warming".

Same back home in da U.P. No snow, everything's dead, businesses are feeling it.