06-12-2008, 02:15 PM
|
#1 (permalink)
|
|
nOOb
Join Date: Jun 2008
Location: Knoxville, Tennessee, USA
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
|
Hello...and a question!
Hello! Like many, I have become interested in hypermiling over the last few weeks, and have been practicing some of the basics. My results so far have been small, but noticeable.
I already have a question, though! (Actually, a two-parter.)
1) The "105 tips" mentions backing into a parking space. However, I have been "auto stopping" into my parking space at home. I would imagine that this is more of a savings than the backing in trick. True? It's a fairly long coast in from the main road.
2) My car has an auto transmission (PT Cruiser). Can I damage the transmission with the auto-stop maneuver? My common sense tells me no, but I thought I read somewhere that auto transmissions could be damaged by "operating" the vehicle with the engine off.
Thanks!
Joe
|
|
|
|
 Today
|
|
|
|
Other popular topics in this forum...
|
|
|
|
|
06-12-2008, 03:40 PM
|
#2 (permalink)
|
|
Master EcoModder
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907
Thanks: 3,475
Thanked 2,950 Times in 1,844 Posts
|
Greetings Joe & welcome,
I am not familiar with "auto stopping" -- what does it mean?
|
|
|
|
|
06-12-2008, 07:37 PM
|
#3 (permalink)
|
|
amateur mech. engineer
Join Date: May 2008
Location: New York City
Posts: 112
Thanks: 0
Thanked 17 Times in 4 Posts
|
Take a look at your owners manual and see what it says about towing a car equipped with an automatic transmission with the drive wheels on the road. Usually the rule is that it should not go over 30 MPH or more than 30 miles with the engine off. Once I towed a car with an automatic transimission a long distance with a tow bar. I kept it idling in neutral to keep oil going to the bearings. If they dry out they can get a lot of wear and then the transmission may lose oil pressure and not shift into gear at idle speed. I've heard that overfilling the transmission with fluid is another way to protect the bearings during towing.
So, to answer your question, the transmission should not be damaged if you keep under 30 MPH when you have the engine off.
|
|
|
|
|
06-12-2008, 08:45 PM
|
#4 (permalink)
|
|
nOOb
Join Date: Jun 2008
Location: Knoxville, Tennessee, USA
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
|
Quote:
Originally Posted by NeilBlanchard
Greetings Joe & welcome,
I am not familiar with "auto stopping" -- what does it mean?
|
Neil:
An auto-stop is shifting the car into neutral, killing the engine, and coasting to a stop. |
|
|
|
|
06-12-2008, 09:35 PM
|
#5 (permalink)
|
|
Administrator
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203
Thanks: 2,501
Thanked 2,586 Times in 1,554 Posts
|
Welcome to the site.
I'd definitly coast to the parking spot if its safe for the tranny. The gains from parking face out are small compared to coasting a good distance.
|
|
|
|
|
06-12-2008, 10:26 PM
|
#6 (permalink)
|
|
Batman Junior
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,515
Thanks: 4,062
Thanked 6,960 Times in 3,604 Posts
|
Agreed with Daox. And definitely make sure your vehicle can be safely "operated" in N with the engine off.
|
|
|
|
|
