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Parking on hill w/manual trans, which gear is best? #68726 06/06/08 05:05 PM 06/06/08 05:05 PM
Joined: May 2005 Posts: 803 Oklahoma M Mopar72Man OP super stock
Mopar72Man OP super stock M Joined: May 2005 Posts: 803 Oklahoma	When parking on a hill which gear would be best to leave the trans in, 1st or 4th? I say 4th, friend says 1st...for some reason in my head im thinking 4th will be harder to turn the engine over...but its been a looooong week! 72 Challenger - will be sublime, little 340 904, 8 3/4" - Under Construction

Re: Parking on hill w/manual trans, which gear is best? [Re: Mopar72Man] #68727 06/06/08 05:08 PM 06/06/08 05:08 PM
Joined: Jan 2003 Posts: 10,030 Wisconsin A Aero426 I Live Here
Aero426 I Live Here A Joined: Jan 2003 Posts: 10,030 Wisconsin	1st or reverse depending on the hill, AND the parking brake.

Re: Parking on hill w/manual trans, which gear is best? [Re: Aero426] #68728 06/06/08 05:12 PM 06/06/08 05:12 PM
Joined: May 2005 Posts: 803 Oklahoma M Mopar72Man OP super stock
Mopar72Man OP super stock M Joined: May 2005 Posts: 803 Oklahoma	Quote: 1st or reverse depending on the hill, AND the parking brake. Still not quite what im lookin for, but WHY 1st and not 4th? 72 Challenger - will be sublime, little 340 904, 8 3/4" - Under Construction

Re: Parking on hill w/manual trans, which gear is best? [Re: Aero426] #68729 06/06/08 05:14 PM 06/06/08 05:14 PM
Joined: Oct 2006 Posts: 842 Urbana, MD B bordin34 super stock
bordin34 super stock B Joined: Oct 2006 Posts: 842 Urbana, MD	1st or reverse, which ever one is numerically higher. Say first gear is 4:1, so one turn of the driveshaft is 4 turns of the engine. In fourth gear of say .75:1, 1 turn of the driveshaft is only .75 turns of the engine. Now which is easier, turning the engine 4 times or .75 times.

Re: Parking on hill w/manual trans, which gear is best? [Re: bordin34] #68730 06/06/08 05:20 PM 06/06/08 05:20 PM
Joined: May 2005 Posts: 803 Oklahoma M Mopar72Man OP super stock
Mopar72Man OP super stock M Joined: May 2005 Posts: 803 Oklahoma	Quote: 1st or reverse, which ever one is numerically higher. Say first gear is 4:1, so one turn of the driveshaft is 4 turns of the engine. In fourth gear of say .75:1, 1 turn of the driveshaft is only .75 turns of the engine. Now which is easier, turning the engine 4 times or .75 times. last time i checked though, say you were push starting the engine..using the starter. You'd sure move a lot better/easier in first than you would 4th. What about an overdrive application? even 'easier' to turn the engine? 1st being a big gear turning a little gear would be easier to turn thanks to the torque of that setup. Say a 5th gear where a little gear would have to turn a larger gear, it'd take more to actually do that..just how it is in my head 72 Challenger - will be sublime, little 340 904, 8 3/4" - Under Construction

Re: Parking on hill w/manual trans, which gear is best? [Re: Mopar72Man] #68731 06/06/08 07:04 PM 06/06/08 07:04 PM
Joined: Nov 2005 Posts: 690 New Hampshire, USA O oldiron mopar
oldiron mopar O Joined: Nov 2005 Posts: 690 New Hampshire, USA	Think it has something to do with torque multiplication. assuming a 3 to 1 1st gear and a 1 to 1 first gear with the engine driving the input shaft the rear sees a 3 to 1 torque multiplication but with the rear wheels driving the input shaft it there would be a 1/3 torque multiplication divide by 3) When in 4th gear (1:1) and the input shaft has the same torque (i.e. more likely to turn the engine over). When driving, downshifting offers braking. I think 66 Belvedere Vert, 4 Speed/Jerico, slowly, very slowly, getting faster - NA LD Wedge New New Best: 10.56 @129 68 B'cuda 4 gear Jerico - Another New Best of 9.86 & Trying to slow up https://www.youtube.com/watch?v=T4jDLKwd9Gs

Re: Parking on hill w/manual trans, which gear is best? [Re: Mopar72Man] #68732 06/06/08 07:41 PM 06/06/08 07:41 PM
Joined: Aug 2006 Posts: 247 DuPont, Washington D DZJim enthusiast
DZJim enthusiast D Joined: Aug 2006 Posts: 247 DuPont, Washington	Quote: When parking on a hill which gear would be best to leave the trans in, 1st or 4th? I say 4th, friend says 1st...for some reason in my head im thinking 4th will be harder to turn the engine over...but its been a looooong week! or easier to slip the clutch. My old man would never leave the '53 or '57 Plymouths in gear when parked; said if someone bumped you, could chip a gear. Of course not too many steep hills in Fresno, and old MOPARS had a POWERFUL parking brake on the driveshaft.

Re: Parking on hill w/manual trans, which gear is best? [Re: DZJim] #68733 06/06/08 07:44 PM 06/06/08 07:44 PM
Joined: Nov 2007 Posts: 21,819 Kirkland, Washington Pacnorthcuda Too Many Posts
Pacnorthcuda Too Many Posts Joined: Nov 2007 Posts: 21,819 Kirkland, Washington	This is actually a great question. I think there is more to it than the gear ratio--like the point at which the clutch will just slip and NOT require the engine to turn. I always put my car in SECOND gear, but I will admit I never really thought real hard about it.

Re: Parking on hill w/manual trans, which gear is best? [Re: Mopar72Man] #68734 06/06/08 08:14 PM 06/06/08 08:14 PM
Joined: Jan 2008 Posts: 553 DE Ply72rr mopar
Ply72rr mopar Joined: Jan 2008 Posts: 553 DE	Use 1st or reverse if parking on a hill.Think about push starting a car with manual trans,you use 3rd or 4th because it's easier to turn the motor,if you use 1st the motor will stop the car or be extremely hard to push.Thats what you want when parked on a hill,extremely hard to push and yes its due to the gear ratio.

Re: Parking on hill w/manual trans, which gear is best? [Re: Ply72rr] #68735 06/06/08 08:32 PM 06/06/08 08:32 PM
Joined: Jun 2004 Posts: 6,780 Alabama Mopar-Al master
Mopar-Al master Joined: Jun 2004 Posts: 6,780 Alabama	I use first or reverse in my car with the parking brake. When I am done with the car totally as stock, my key only comes out when it is in reverse from the factory

Re: Parking on hill w/manual trans, which gear is best? [Re: Mopar-Al] #68736 06/06/08 09:23 PM 06/06/08 09:23 PM
Joined: Oct 2005 Posts: 9,065 Milwaukee, WI In_The_Pink master
In_The_Pink master Joined: Oct 2005 Posts: 9,065 Milwaukee, WI	I don't think it matters which gear because there should be two preceding factors which should keep your car from even moving when parked on a hill: 1) Turning you front tire at an angle so it's touching the curb 2) Setting the parking brake

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