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Just wondering which trucks get hydro-boost brakes. I thought my 7.3 350 SRW was coming with vacuum assist. But it came with hydro, and I’ve been trying to figure out what determines which trucks get it since. I thought it was DRWs, but obviously not.
Its my understanding on DRW diesel pickup trucks get hydroboost. There is no mention of a SRW hydroboost and all the ones I have seen in the shop are all vacuum assist. I think a picture is in order.
I wish I knew where to find it but there was a thread, from what I remember, made it seem like as of 2020 there may be SRW trucks with hydro boost. It included pictures that looked to back that up.
Here’s a picture of the hydro boost unit. Truck is a F350, 7.3 SCLB SRW. The truck has a 11,800 GVWR with camper/snow package and 5th wheel prep. It also has the Pro Trailer Assist with the electric/hydraulic power steering pump. Maybe that has something to do with it? I don’t know?
Just wondering which trucks get hydro-boost brakes. I thought my 7.3 350 SRW was coming with vacuum assist. But it came with hydro, and I’ve been trying to figure out what determines which trucks get it since. I thought it was DRWs, but obviously not.
Edit missed last post with specs
Originally Posted by DSLTRK60
Only DRW trucks get hydro boost, gas or diesel.
I have looked at several 12400 GVWR CCLB SRW 6.7L that have hydro. See post 12 for a picture on a previous thread I started before ordering.
Here’s a picture of the hydro boost unit. Truck is a F350, 7.3 SCLB SRW. The truck has a 11,800 GVWR with camper/snow package and 5th wheel prep. It also has the Pro Trailer Assist with the electric/hydraulic power steering pump. Maybe that has something to do with it? I don’t know?
If I was a betting man I would say it is because of the >11500 GVWR. I going out on a limb and speculate that the vacuum boots cutoff is going to be 11500 GVWR even though the Ford documentation states only duly’s get hydro. Ford could have missed updating there documentation with all the new higher GVWRs.
If I was a betting man I would say it is because of the >11500 GVWR. I going out on a limb and speculate that the vacuum boots cutoff is going to be 11500 GVWR even though the Ford documentation states only duly’s get hydro. Ford could have missed updating there documentation with all the new higher GVWRs.
Maybe, it does seem that the steering sector shaft is in the way of a vac boost unit however. Maybe. Would be interesting to know exactly.
I had hydro-boost on my 2006 F250 6.4 CCSB and loved the feel so much that I adapted one to my 1968 big block Corvette during its restoration. My 2017 F250 6.7 CCSB has vacuum boost and I also miss the solid feel of the hydro-boost, although the truck seems to stop just fine.
For those who want to know "why in the Corvette," The cam in the engine is big enough to have lousy idle vacuum and it was a hydro-boost or a separate electric vacuum pump for the brakes.
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