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High Mileage Transmission Change #4674196
02/22/18 10:13 AM
02/22/18 10:13 AM
Joined: Feb 2018
Posts: 3
Michigan
toreytlow Offline OP
toreytlow  Offline OP
Joined: Feb 2018
Posts: 3
Michigan
I have a 2006 Chevy Impala with 140k miles. It has never had the transmission fluid flushed or changed. I am not having any apparent issues with my transmission, however the fluid on the dipstick is a light to medium brown; similar to a new motor oil color.

My question is, Should I drain and fill the pan, and replace the filter? Or will this possibly cause an accelerated wearing of what is left of my transmission? I called over 10 transmission shops in the area, and I received a wide array of answers which included:
A. DO NOT GET A FLUSH NO MATTER WHAT (this was advice from most every shop.)
B. Get your pan drained and filled (those who said this, said that the idea that a change accelerates the wearing process only applies to older vehicles. This just doesnt seem right to me.)
C. At least 5 different people advised that at 140k miles, I should just leave it alone if it is working fine now. They said that emptying any of the fluid that has clutch material suspended in it and replacing it with clean fluid could cause slipping, because the clutch pads no longer have the friction material on them OR in the fluid surrounding them.

PLEASE HELP!!!!

Re: High Mileage Transmission Change [Re: toreytlow] #4674201
02/22/18 10:19 AM
02/22/18 10:19 AM
Joined: May 2010
Posts: 2,119
Illinois, U.S.A
RamFan Offline
RamFan  Offline
Joined: May 2010
Posts: 2,119
Illinois, U.S.A
I'd drop the pan and change the fluid/filter. Or get a Mityvac and do a simple fluid exchange. I dropped the pan in our Monte at around 130k miles on it and the pan was almost spotless. I think changing a trans filter is kind of a thing of the past, they just are soooo much cleaner than they once were.

This is all my opinion though, no science to back it up.


18 Giulia Ti Sport Q4
+2.0l turbo - 4k - PP Euro LX 0w30 - Mopar - 10k/1yr
16.5 CX-5 Touring AWD
+2.5l - 50k - SynPower w/ Maxlife 0w20 - PureOne - 8k/1yr
Re: High Mileage Transmission Change [Re: toreytlow] #4674204
02/22/18 10:19 AM
02/22/18 10:19 AM
Joined: Oct 2009
Posts: 388
California
Billbert Offline
Billbert  Offline
Joined: Oct 2009
Posts: 388
California
You should drop the pan and change the filter before problems start. transmissions do not like to be starved of fluid by a clogged filter.

Last edited by Billbert; 02/22/18 10:21 AM. Reason: spelling

If you think you can, or if you think you can't, You are probably right.

Auto Instructor / ASE Master Tech
Re: High Mileage Transmission Change [Re: toreytlow] #4674217
02/22/18 10:36 AM
02/22/18 10:36 AM
Joined: Jun 2012
Posts: 1,763
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,763
USA
+1 on pan drop, change filter, refill. Maybe go 2500 miles suck the fluid out and refill again.


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: High Mileage Transmission Change [Re: toreytlow] #4674225
02/22/18 10:45 AM
02/22/18 10:45 AM
Joined: Nov 2008
Posts: 3,292
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,292
Oshawa, Ontario Canada
Here are my two cents.

Drain and fill first and see what the results are. If all is ok, then wait a bit maybe 3000 miles or whatever time you feel comfortable with. Then drop the pan and clean the pan and change the filter and refill.


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: High Mileage Transmission Change [Re: toreytlow] #4674240
02/22/18 10:59 AM
02/22/18 10:59 AM
Joined: Oct 2017
Posts: 506
Northeastern Vermont
littleant Offline
littleant  Offline
Joined: Oct 2017
Posts: 506
Northeastern Vermont
I would do a fluid and filter change. Agree on not doing a flush.


I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0
Re: High Mileage Transmission Change [Re: toreytlow] #4674241
02/22/18 11:00 AM
02/22/18 11:00 AM
Joined: Dec 2017
Posts: 1,321
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,321
US
Definitely NO flush. At 140k I like the mityvac method, remove a 1/2 quart every couple of weeks and replace. Eventually it will be all new fluid. Drive that way awhile, then do a pan drop, filter change and refill. Then repeat the pan drop/filter routine every 30-50k.


I'm a thickie; assimilate
But 20s have their place

Using AMSOIL

Hers: 2008 Jeep Liberty 138k, SS 5w30/Amsoil

His: 2015 4Runner 41k, OE 5w30/Wix

Re: High Mileage Transmission Change [Re: JC1] #4674243
02/22/18 11:01 AM
02/22/18 11:01 AM
Joined: Sep 2015
Posts: 3,941
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,941
Connecticut
Originally Posted By: JC1
Here are my two cents.

Drain and fill first and see what the results are. If all is ok, then wait a bit maybe 3000 miles or whatever time you feel comfortable with. Then drop the pan and clean the pan and change the filter and refill.


+1

If there is eventual eventual slippage from worn clutches there are probably safe Lubeguard additives to give you some "grip" back. Ensure you put the correct fluid back into the vehicle.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: High Mileage Transmission Change [Re: toreytlow] #4674252
02/22/18 11:05 AM
02/22/18 11:05 AM
Joined: Apr 2012
Posts: 5,594
MA
Wolf359 Online content
Wolf359  Online Content
Joined: Apr 2012
Posts: 5,594
MA
Pretty much what everyone else said. The transmission shops don't like to do it because they're afraid if there are problems later you are going to blame them.

Re: High Mileage Transmission Change [Re: toreytlow] #4674270
02/22/18 11:18 AM
02/22/18 11:18 AM
Joined: Jan 2013
Posts: 2,099
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 2,099
Texas
Transmissions like clean , pink / red fluid of the correct specification .

Our little red Chevy Sonic has no dip stick and no DIY serviceable transmission filter . Thank you , GM , twice ! :-(

It does have a little drain plug on the bottom . I have done a drain and fill twice . May do another one , when the weather warms up .

With no user serviceable filter , I DO NOT want the internal filter to stop up !


Wyr
God bless
Re: High Mileage Transmission Change [Re: toreytlow] #4674299
02/22/18 11:32 AM
02/22/18 11:32 AM
Joined: Apr 2015
Posts: 289
Georgia
Charlie2015 Offline
Charlie2015  Offline
Joined: Apr 2015
Posts: 289
Georgia
Drop the pan, change the filter, and add back new fluid - but only if you have enough money in your bank account for a replacement transmission. Right now, your transmission is working fine. As soon as you start messing with it, you have no idea if it is going to run better or worse.


1998 Honda Accord EX 2.3L Auto (Sold) 214k mi
2009 Scion tC Manual (Daily Driver) 165k mi
Re: High Mileage Transmission Change [Re: Charlie2015] #4674309
02/22/18 11:38 AM
02/22/18 11:38 AM
Joined: Feb 2018
Posts: 3
Michigan
toreytlow Offline OP
toreytlow  Offline OP
Joined: Feb 2018
Posts: 3
Michigan
Originally Posted By: Charlie2015
Drop the pan, change the filter, and add back new fluid - but only if you have enough money in your bank account for a replacement transmission. Right now, your transmission is working fine. As soon as you start messing with it, you have no idea if it is going to run better or worse.


First off, thanks to everyone for the advice. To add onto this Charlie, the kbb value of my car in the area and condition is right around $3-3.5k. With this mileage, am I better off rebuilding the trans if it goes, or using that money towards a different used car? Sorry, this is my very first and only vehicle!!!

Re: High Mileage Transmission Change [Re: toreytlow] #4674322
02/22/18 11:45 AM
02/22/18 11:45 AM
Joined: Oct 2010
Posts: 5,410
Florida
Artem Offline
Artem  Offline
Joined: Oct 2010
Posts: 5,410
Florida
Do a simple drain and fill with proper spec fluid (preferably OEM, since it was good for 140k miles.

If the transmission is in good health, it will only benefit from fresh fluid providing the proper spec of slip and protection.

If the tranny is about to expire anyway, well... you've got bigger problems. LOL


2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart. (thanks Advance Auto Parts for the awesome deal)
Re: High Mileage Transmission Change [Re: toreytlow] #4674334
02/22/18 11:51 AM
02/22/18 11:51 AM
Joined: Nov 2008
Posts: 9,293
Phoenix
dishdude Offline
dishdude  Offline
Joined: Nov 2008
Posts: 9,293
Phoenix
Put me in the leave it alone camp.


2018 Challenger SRT 392 PUP 0w-40 Wix 57899XP
2018 GTI
Re: High Mileage Transmission Change [Re: dishdude] #4674340
02/22/18 11:57 AM
02/22/18 11:57 AM
Joined: Feb 2018
Posts: 3
Michigan
toreytlow Offline OP
toreytlow  Offline OP
Joined: Feb 2018
Posts: 3
Michigan
Originally Posted By: dishdude
Put me in the leave it alone camp.


Could you please explain why you would choose to leave it alone?? Thanks!

Torey

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