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Drivetrain - 2001 - 2010 Discuss front and rear axle, transfer case, brakes, etc. Transmission questions belong in the appropriate transmission forum below. First through fourth generation...

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Old 03-03-2020, 03:00 PM   #11 (permalink)
jackssw
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Curious - any idea why it's an -903 oring from PS pump to HB.....and -902 from HB to gear box? Would figure those 2 orings on top of the hydrobooster would be the same? Aren't those lines the same size?

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Old 03-03-2020, 06:33 PM   #12 (permalink)
mp06011999
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Quote:
Originally Posted by jackssw View Post
Curious - any idea why it's an -903 oring from PS pump to HB.....and -902 from HB to gear box? Would figure those 2 orings on top of the hydrobooster would be the same? Aren't those lines the same size?
The fitting is different. There are actually 3 o-rings on the booster for hoses / lines. Let me clarify. All the high psi lines take the 903 and only the nipple for the low psi return hose from the booster takes the 902, iirc. In your pic, that's the 180 curved hose right on top of the booster closest to the mc. Once you remove the hose clamp and hose the nipple can be backed out. And that's the o-ring that most likely leaks if its anything like mine. And it won't take a 903 because it's a smaller diameter than the metal portion of all the other lines. The 903 o-ring inner diameter is too big for that nipple.

Edit: A pics worth a 1000 words (my old booster):

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File Type: jpg IMG_20200303_154139.jpg (57.1 KB, 4 views)
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*2006 2500HD SLT, LBZ, 4x4, Auto, ex. cab, 8' bed.

I don't want to brag... but this is like the 5th "End of the World" I've survived.

Democrats: abolish ICE... free health care for illegals... make it easy for illegals who cross to stay... give illegals the right to vote... adamantly oppose building a secure border... create "sanctuary cities"... grant illegals in the country amnesty... welfare for illegals... tip off illegals about ICE raids.
And we're supposed to believe that Democrats aren't for open borders simply because they say so?


Last edited by mp06011999; 03-03-2020 at 06:45 PM.
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Old 03-04-2020, 11:41 AM   #13 (permalink)
jackssw
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Oh okay! got it now! Wow, thank you so much for all the help. I owe you a case of beer!
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Old 03-04-2020, 11:24 PM   #14 (permalink)
biotec
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High pressure lines
Amazon PS pump to booster $16 AC Delco 36-358980
Ebay Boost to steering gear $20 AC Delco 36-365453 (Amazon $29)

If replacing both lines, be certain to properly bleed the system.
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Old 03-05-2020, 09:48 AM   #15 (permalink)
mp06011999
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Well, I just...

More appropriate thread:

https://www.dieselplace.com/forum/76...ml#post9883618
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*2006 2500HD SLT, LBZ, 4x4, Auto, ex. cab, 8' bed.

I don't want to brag... but this is like the 5th "End of the World" I've survived.

Democrats: abolish ICE... free health care for illegals... make it easy for illegals who cross to stay... give illegals the right to vote... adamantly oppose building a secure border... create "sanctuary cities"... grant illegals in the country amnesty... welfare for illegals... tip off illegals about ICE raids.
And we're supposed to believe that Democrats aren't for open borders simply because they say so?


Last edited by mp06011999; 03-05-2020 at 09:50 AM.
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Old 03-14-2020, 08:06 PM   #16 (permalink)
jackssw
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Join Date: Oct 2010
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I know everyone has been hanging on a thread regarding my truck.

Quick update - Hydrobooster was just leaking like crazy, even with new orings. Decided to do a full replacement of the hydrobooster and mastercylinder (was leaking a bit as well). Everything has been replaced...now I just have to flush the power steering fluid and bleed the brakes. Any reason why I should do one before the other? Does it matter?

Thanks again for all the guidance on this project.
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Old 03-14-2020, 09:39 PM   #17 (permalink)
mp06011999
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Quote:
Originally Posted by jackssw View Post
I know everyone has been hanging on a thread regarding my truck.

Quick update - Hydrobooster was just leaking like crazy, even with new orings. Decided to do a full replacement of the hydrobooster and mastercylinder (was leaking a bit as well). Everything has been replaced...now I just have to flush the power steering fluid and bleed the brakes. Any reason why I should do one before the other? Does it matter?

Thanks again for all the guidance on this project.
Ya got me there, but..... If I had to guess... since you need the brakes for the PS bleed, but not the PS for the brake bleed, I'd do brakes first - with engine off so as not to pump air thru the PS system.
__________________
*2006 2500HD SLT, LBZ, 4x4, Auto, ex. cab, 8' bed.

I don't want to brag... but this is like the 5th "End of the World" I've survived.

Democrats: abolish ICE... free health care for illegals... make it easy for illegals who cross to stay... give illegals the right to vote... adamantly oppose building a secure border... create "sanctuary cities"... grant illegals in the country amnesty... welfare for illegals... tip off illegals about ICE raids.
And we're supposed to believe that Democrats aren't for open borders simply because they say so?


Last edited by mp06011999; 03-14-2020 at 09:40 PM.
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