LS swap with hydroboost question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kwin · 10-10-2011, 12:04 AM

I recently purchased a 2006 5.3, a 700 r4, and a cable throttle body.So I have to order a flywheel spacer and motor mount plates and i'm ready to get going.
My 1990 CC is equipped with hydroboost and I would love to retain it. The pumps are not the same one has 3 lines (HB) and the 5.3 has 2 , has anyone ever dealt with this before?
Is this do-able?

Thanks
Keith

BR3W CITY · 10-10-2011, 08:16 PM

the truck engines didn't all come with hydroboost pumps. My 6.0 had the hydroboost pump already on it, which has the correct 3 lines. IIRC they can be swapped out from another modern truck, you'd just have to buy the right pump.

pat565 · 10-10-2011, 10:25 PM

Quote:

Originally Posted by kwin

I recently purchased a 2006 5.3, a 700 r4, and a cable throttle body.So I have to order a flywheel spacer and motor mount plates and i'm ready to get going.

Thanks
Keith

Thre are some GM flywheels that don't require spacers. I think that the th400 and the 700r4 are the same. If so, I have a new one here that I won't be using. I ended up using a 4L60E trans

I have an extra set of adapter plates too

usmcchevy · 10-10-2011, 10:35 PM

You can use a non-HB pump, just T the return lines together.

10-10-2011, 12:04 AM	#1
kwin Registered User Join Date: May 2011 Location: Grande Prairie, Alberta Posts: 368	LS swap with hydroboost question I recently purchased a 2006 5.3, a 700 r4, and a cable throttle body.So I have to order a flywheel spacer and motor mount plates and i'm ready to get going. My 1990 CC is equipped with hydroboost and I would love to retain it. The pumps are not the same one has 3 lines (HB) and the 5.3 has 2 , has anyone ever dealt with this before? Is this do-able? Thanks Keith

10-10-2011, 08:16 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: LS swap with hydroboost question the truck engines didn't all come with hydroboost pumps. My 6.0 had the hydroboost pump already on it, which has the correct 3 lines. IIRC they can be swapped out from another modern truck, you'd just have to buy the right pump. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

10-10-2011, 10:35 PM	#4
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: LS swap with hydroboost question You can use a non-HB pump, just T the return lines together. __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index



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