over drive
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Joined: Jun 2004
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over drive
Had my V 10 for 8 months now and still have not looked at the owners manual.I see alot of post about hauling in overdrive I was always told this should not be done? Does it make a differance betweeen manual and automatic? When I'm hauling and get up to speed I put mine in overdrive, is this wrong? and how about climbing mountains unloaded. Mine is a 2004 auto.
Laughing Gas
Joined: Jan 2004
Posts: 1,142
Likes: 2
From: Denver, CO
I take mine out of OD when climbing and decending large hills. Keeps the tranny from searching for gears and engine brake effect when decending. I don't remember what the owners manual said. You should read it good info in there like the seat belt "dance" and door chim "dance".
Logistics Pro
Joined: Jan 2002
Posts: 3,733
Likes: 38
Heat is the auto tranny enemy!
Owners manual suggests that you can use OD all the time "unless" you notice a lot of shifting, then it is "recommended" to lock out OD, and haul the hills and mountains in drive.
Really not a very good explanation of what is going on and you can easily smoke your fluid unless you pay close attention to the tranny oil temp. The torque converter (TC) has a lock up clutch and before a downshift or up shift, the TC will start to do the lock/unlock dance and is noticeable usually only visually with the tachometer and not seat of the pants. The tach varies by only a couple of hundred RPMs, and when it does this, the tranny temp can climb to real HOT fairly quickly. Most of us that tow/haul a heavy load in the hills and mountains have learned to add deep trans pan, extra oil cooler, and temp gauge for trucks that don't have one. Keep the temp well below 220F and all is well.
BTW: Other than the deep cost in fuel MPG, these engines like pulling up the hill at whatever gear will get you to about 4500-4800 RPM and they will do it all day long!
Owners manual suggests that you can use OD all the time "unless" you notice a lot of shifting, then it is "recommended" to lock out OD, and haul the hills and mountains in drive.
Really not a very good explanation of what is going on and you can easily smoke your fluid unless you pay close attention to the tranny oil temp. The torque converter (TC) has a lock up clutch and before a downshift or up shift, the TC will start to do the lock/unlock dance and is noticeable usually only visually with the tachometer and not seat of the pants. The tach varies by only a couple of hundred RPMs, and when it does this, the tranny temp can climb to real HOT fairly quickly. Most of us that tow/haul a heavy load in the hills and mountains have learned to add deep trans pan, extra oil cooler, and temp gauge for trucks that don't have one. Keep the temp well below 220F and all is well.
BTW: Other than the deep cost in fuel MPG, these engines like pulling up the hill at whatever gear will get you to about 4500-4800 RPM and they will do it all day long!
Posting Guru
Joined: Mar 2002
Posts: 2,245
Likes: 16
From: Vancouver Wash USA
Originally Posted by WHAT EVER
Had my V 10 for 8 months now and still have not looked at the owners manual.I see alot of post about hauling in overdrive I was always told this should not be done? Does it make a differance betweeen manual and automatic? When I'm hauling and get up to speed I put mine in overdrive, is this wrong? and how about climbing mountains unloaded. Mine is a 2004 auto.
Last edited by ken04; Jun 23, 2004 at 01:46 PM.
Posting Guru
Joined: Mar 2002
Posts: 2,245
Likes: 16
From: Vancouver Wash USA
Originally Posted by MadMedic20
How much work is involced with installing a trans temp gauge? Would it be "easy" while changing to a larger pan? I plan on buying a 32' travel trailer and want to do some towing upgrades.
