6.4L Power Stroke Engine and DrivetrainDiscussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008 Super-Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.
I have found at local dealerships a job 2 that i really like (solid gray) and a job 3 (gray w/black on bottom) that is ok (further away). They are both similarily equipped lariats and the solid gray is about $500 less w/couple of extra options (due to price increases from 2 to job 3). Are thier any differences between job 2&3 that should be concerned about, as i like the job 2 truck better? Thanks for your input.
__________________
2008 Ford F-350 Lariat crew cab dark shadow gray w/all options except camera and nav.
2006 Dodge Ram 3500, CTD, 6speed, quad cab long box, mineral gray, bighorn edition, edge w/attitude, stainless nerf bars, billet grill, 285 BFG a/t's.
2003 F-350 XLT, crew cab, 7.3L, auto, 80k
2005 F-150 Lariat Supercrew, moon roof
2006 F-650 XLT, CTD, allison 5speed auto, 14' landscaper body w/fold down sides
1997 Ford F-250 XLT, extended cab, 7.3L, Auto 140K
1996 Ford F-250 XLT, extended cab, 7.3L, 5 speed man. 125K
The biggie is the difference in the "power" brakes. For '99-up PSDs, the brakes were hydroboost - i.e., hydraulic powered instead of vacuum powered. Diesels don't make vacuum, so it made sense to not have to add a big vacuum pump to make the power brakes work. Hydroboost brakes use the power steering pump to make the hydraulic power needed for the hydroboost brakes.
One disadvantage of the hydroboost brakes was some younger drivers didn't know how to drive. They wanted to turn the steering wheel while standing on the brakes at the same time. But the pump wasn't strong enough to allow you to do that. So some complaints from owners about the power steering not working. Vacuun-powered brakes shouldn't have that problem if the vacuum pump is strong enough.
So beginning with Job 3, most of the SRW pickups now have vacuum-assist brakes instead of hydroboost. "Real" trucks with dual rear wheels still have hydro-boost. You can still get hydro-boost brakes on SRW pickups if you order dual altenators. (No, I don't know why.)
__________________
My Sierra Blanca is a '99.5 PSD CrewCab hot-rod Towing Machine! BTS tranny; TurboRamAir intake and 4" stainless turbo-back exhaust; DP-Tuner tunes flashed into an Edge Evolution tuner; ISSPRO EV gauges and TTM; AIC; SP-Diesel exhaust brake and torque converter controller. I special-ordered it new and plan to drive it until it quits.
Last edited by SmokeyWren : 02-24-2008 at 09:16 AM.
Thanks for the input guys, which braking system is preferred?? I have an 03 and have never had problems with the hydro, don't know enough about the vacuum assist. Will the hydroboost be more reliable? Anyone know of any updated parts/software used on job3 as opposed to job2? Will be deciding monday so i make sure and get the deal done before the end of the month (0% )! Thanks again.
__________________
2008 Ford F-350 Lariat crew cab dark shadow gray w/all options except camera and nav.
2006 Dodge Ram 3500, CTD, 6speed, quad cab long box, mineral gray, bighorn edition, edge w/attitude, stainless nerf bars, billet grill, 285 BFG a/t's.
2003 F-350 XLT, crew cab, 7.3L, auto, 80k
2005 F-150 Lariat Supercrew, moon roof
2006 F-650 XLT, CTD, allison 5speed auto, 14' landscaper body w/fold down sides
1997 Ford F-250 XLT, extended cab, 7.3L, Auto 140K
1996 Ford F-250 XLT, extended cab, 7.3L, 5 speed man. 125K
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.
Ford F-350 Lariat crew cab dark shadow gray w/all options except camera and nav.
You can still get hydro-boost brakes on SRW pickups if you order dual altenators. (No, I don't know why.) 
)! Thanks again. 
Linear Mode
