Shifting an Auto Tranny?

Mr.James · August 19th, 2010, 12:34 AM

ok so this is my first post in a LONG time..but i wanted to know if shifting my auto tranny myself would destroy my transmission?

i tried it the other day to see what would happen..i put it in 1st gear, floored it, shifted it to 2nd around 5000 RPM and then shifted into Drive around 5000 RPM again..if this doesnt hurt my tranny id like to do it more often because it helped me accelerate alot quicker, it even broke the tires lose going into 2nd for the first time, ha

so is this bad for the transmission or is ok to do this every now and then?

v6kid · August 19th, 2010, 12:35 AM

It's fine to do. You are just telling your tranny what gear to be in, rather than the tranny "thinking" about it.

Mr.James · August 19th, 2010, 12:42 AM

Originally Posted by v6kid

It's fine to do. You are just telling your tranny what gear to be in, rather than the tranny "thinking" about it.

oh alright, i didn't know if it would grind up the tranny or not since the computer usually does the shifting, thanks though!

RFM 40th V6 · August 19th, 2010, 12:57 AM

The only difference between letting it go in D vs Manual low 2 and manual low 1 is that the 1 and 2 position will provide engine braking because the low/reverse band is applied. Also the manual valve is in a different position.

Overall there is no accelerated wear on the trans.

ESG-642T · August 19th, 2010, 01:04 AM

Even better the trans shifts faster than you, so just let it do its thing

RFM 40th V6 · August 19th, 2010, 01:12 AM

Especially if you have it tuned.

Rich J · August 19th, 2010, 01:12 AM

Hmm I will put it simply, take it from me who has an auto and has tried this and thought everything through and tried it all...... NO. Lol

let the computer do everything and if you don't like the shifting then just buy a tuner.

KennethRichard · August 19th, 2010, 01:40 AM

my sisters boyfriend drives/drived his camero like that all the time, 3 transmitions and now awaiting a new engine, it sits in their driveway...

superpede1 · August 19th, 2010, 03:30 AM

From what I gather upshifting is ok but downshifting will break the trans because the 4R70W when you manually downshift the oil pressure drops and then spikes and it can do damage to the trans when that happens.

BadBlackGT · August 19th, 2010, 03:39 AM

Originally Posted by superpede1

From what I gather upshifting is ok but downshifting will break the trans because the 4R70W when you manually downshift the oil pressure drops and then spikes and it can do damage to the trans when that happens.

not to mention the rear end. The engine doesn't rev up like you would need to do and can lock up the rear end and can even cause the back wheels to stop and chirp for a bit putting lots of stress on the differential. Just think of a manual car downshifting without rev matching at a high speed.

Rich J · August 19th, 2010, 03:45 AM

Back to my previous answer lol, Just NO. I wouldn't risk damaging your car like that. I mean if you want you can up shift occasionally but I wouldnt do it often at all and def not in a track situation.

Matt. · August 19th, 2010, 11:32 AM

The only time I would touch the shifter imo, is turning overdrive off or downshifting to 2nd go from a roll, Let the car do all the upshifting for you. Becareful shifting though, I know a dumbass kid who downshifting to 2nd, forgot to upshift to D and slammed it through neutrual and then reverse( Guess he was panicing) And ended up sliding roasting his tires from like 70mph.

v606er · August 19th, 2010, 11:37 AM

It is pointless.

01stangV6 · August 19th, 2010, 12:59 PM

yeah i wouldnt do it.. if you want to shift get a manual or a tuner

FLMustang02 · August 19th, 2010, 02:34 PM

^^+1 if you want to shift, get a manual, this sorta reminds me of people puttin their cars in neutral at a stop light when their car is auto, pointless

v6kid · August 19th, 2010, 02:40 PM

Their little leg doesn't have to put as much pressure on the brake pedal....lol

August 19th, 2010, 12:34 AM	#1
Mr.James Regular 2000 Mustang V6 Join Date: Jul 2009 Location: Central Pa Posts: 52 iTrader: 0 reviews	Shifting an Auto Tranny? ok so this is my first post in a LONG time..but i wanted to know if shifting my auto tranny myself would destroy my transmission? i tried it the other day to see what would happen..i put it in 1st gear, floored it, shifted it to 2nd around 5000 RPM and then shifted into Drive around 5000 RPM again..if this doesnt hurt my tranny id like to do it more often because it helped me accelerate alot quicker, it even broke the tires lose going into 2nd for the first time, ha so is this bad for the transmission or is ok to do this every now and then?

August 19th, 2010, 12:35 AM	#2
v6kid Hardcore Enthusiast 1999 Mustang v6 Join Date: May 2010 Location: Clearwater, FL Posts: 1,725 iTrader: 0 reviews	It's fine to do. You are just telling your tranny what gear to be in, rather than the tranny "thinking" about it. __________________ I went to school to be a mechanic, so I know what I'm talking about most of the time. mods in the garage, slowly getting peppier. 6ershootout.com summer of 2012... Be There

August 19th, 2010, 01:04 AM	#5
ESG-642T [8MINUS2] 2002, Ford, v6 Join Date: Feb 2007 Location: TEXAS Posts: 12,319 iTrader: 0 reviews	Even better the trans shifts faster than you, so just let it do its thing __________________ Hi, You can call me Kyle Random ESG fact: Had a prochamber on his v6 before it was popular. WTB: v6 BBK valve covers

August 19th, 2010, 01:12 AM	#7
Rich J I'm doing it wrong 04 Grand Cherokee Join Date: Mar 2010 Location: South Eastern, Mass Posts: 5,211 iTrader: 0 reviews	Hmm I will put it simply, take it from me who has an auto and has tried this and thought everything through and tried it all...... NO. Lol let the computer do everything and if you don't like the shifting then just buy a tuner. __________________ Formerly known as Demon_54 "I feel the same way about disco as I do about herpes." - Hunter S. Thompson

August 19th, 2010, 01:40 AM	#8
KennethRichard Regular 1997 V6 Mustang 0-60mph 9.7s Join Date: Jul 2010 Location: Long Island, NY Posts: 97 iTrader: 0 reviews	my sisters boyfriend drives/drived his camero like that all the time, 3 transmitions and now awaiting a new engine, it sits in their driveway... __________________

August 19th, 2010, 03:30 AM	#9
superpede1 Regular Tricycle Join Date: Aug 2007 Posts: 287 iTrader: 0 reviews	From what I gather upshifting is ok but downshifting will break the trans because the 4R70W when you manually downshift the oil pressure drops and then spikes and it can do damage to the trans when that happens.

August 19th, 2010, 03:45 AM	#11
Rich J I'm doing it wrong 04 Grand Cherokee Join Date: Mar 2010 Location: South Eastern, Mass Posts: 5,211 iTrader: 0 reviews	Back to my previous answer lol, Just NO. I wouldn't risk damaging your car like that. I mean if you want you can up shift occasionally but I wouldnt do it often at all and def not in a track situation. __________________ Formerly known as Demon_54 "I feel the same way about disco as I do about herpes." - Hunter S. Thompson

August 19th, 2010, 11:32 AM	#12
Matt. Hardcore Enthusiast 2002 Nitrous Injected V6 12's? Join Date: Oct 2009 Location: Chester County, PA Posts: 2,414 iTrader: 0 reviews	The only time I would touch the shifter imo, is turning overdrive off or downshifting to 2nd go from a roll, Let the car do all the upshifting for you. Becareful shifting though, I know a dumbass kid who downshifting to 2nd, forgot to upshift to D and slammed it through neutrual and then reverse( Guess he was panicing) And ended up sliding roasting his tires from like 70mph. __________________ Project Red Magic -Full Intake, Full Exhuast,Geared, Tune, Sprayed, Dropped- -18 Inch Hypercoated Saleens wrapped in Nittos-

August 19th, 2010, 12:59 PM	#14
01stangV6 It's not easy being green! 2001 mustang 3.76@306 Join Date: Apr 2010 Location: Tennessee Posts: 4,251 iTrader: 0 reviews	yeah i wouldnt do it.. if you want to shift get a manual or a tuner __________________ 2001 V6 vert....mostly stock but she's my beauty. TOPLESS MUSTANG CLUB

August 19th, 2010, 02:34 PM	#15
FLMustang02 Regular 06 BMW M3 Join Date: Oct 2009 Location: Florida Posts: 189 iTrader: 0 reviews	^^+1 if you want to shift, get a manual, this sorta reminds me of people puttin their cars in neutral at a stop light when their car is auto, pointless __________________ Garage: 02 Mustang---SOLD N GONE 96 Integra---Daily 06 BMW M3---Weekend

August 19th, 2010, 02:40 PM	#16
v6kid Hardcore Enthusiast 1999 Mustang v6 Join Date: May 2010 Location: Clearwater, FL Posts: 1,725 iTrader: 0 reviews	Their little leg doesn't have to put as much pressure on the brake pedal....lol __________________ I went to school to be a mechanic, so I know what I'm talking about most of the time. mods in the garage, slowly getting peppier. 6ershootout.com summer of 2012... Be There

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