Transmission fluid change?
Melting Slicks
Joined: Oct 2006
Posts: 3,447
Likes: 6
From: Los Angeles
GM says 100k for the coolant. I don't remember the tranny, but it may be about the same. Personally I would change it sooner than that. I have 62k on mine and looking to change trans/diff soon just for peace of mind.
Drifting
Joined: May 2005
Posts: 1,566
Likes: 52
From: Colorado Springs CO
GM says 100K for the tranny (from the owner's manual) UNLESS you drive in dusty or mountainous regions, in which case you should do it at 50K. I did mine at 60K (moved to Colorado at about 55K) and it was in need of changing.
Coolant is at 100K, and there really isn't any need to change it out unless it gets contaminated by, say, topping off with the wrong type of coolant.
Costs vary slightly, but a tranny fluid CHANGE will run about $100, while a FLUSH will run close to $200. My mechanic said he would drain it first, and then if the fluid was dirty and gritty, he would flush it, otherwise he would just change it. I just needed a change. Hope that helps!
Glen
Coolant is at 100K, and there really isn't any need to change it out unless it gets contaminated by, say, topping off with the wrong type of coolant.
Costs vary slightly, but a tranny fluid CHANGE will run about $100, while a FLUSH will run close to $200. My mechanic said he would drain it first, and then if the fluid was dirty and gritty, he would flush it, otherwise he would just change it. I just needed a change. Hope that helps!
Glen
Melting Slicks
Joined: Feb 2006
Posts: 3,400
Likes: 3
From: Sarasota Florida
Earlier this year my car overheated because two of my radiator tubes where so blocked the radiator shop couldn't even run a rod through them; I had approx 60K om my 02. The new radiator cost me $700 (an OEM radiator would have cost even more)......I wouldn't wait until I hit 100K or 5 years to change the radiator fluid.
Saturday I took my Vette to a local garage to have the tranny (MN6) fluid and differential fluid changed at 63K both fluids where very dirty and smelled like
. The garage charged me $40 for labor because I brought my own fluid (Royal Purple) which cost me about $60 at Pep Boys. My tranny shifts much smoother now. Next is I will flush out the clutch and power steering fluid which I will do myself.
Saturday I took my Vette to a local garage to have the tranny (MN6) fluid and differential fluid changed at 63K both fluids where very dirty and smelled like
. The garage charged me $40 for labor because I brought my own fluid (Royal Purple) which cost me about $60 at Pep Boys. My tranny shifts much smoother now. Next is I will flush out the clutch and power steering fluid which I will do myself.
Last edited by stormrider; Jul 9, 2007 at 06:19 PM.
Intermediate
Joined: Apr 2007
Posts: 49
Likes: 0
From: The Woodlands Texas
What Royal Purple do you put in the tranny and differential?
I have a '98 with 30K and I want to use Royal Purple in the engine as well.
I live about 20 miles from the RP plant.
I have a '98 with 30K and I want to use Royal Purple in the engine as well.
I live about 20 miles from the RP plant.
Last edited by hogman; Jul 9, 2007 at 06:57 PM.
Melting Slicks
Joined: Feb 2006
Posts: 3,400
Likes: 3
From: Sarasota Florida
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Jun 2007
Posts: 2,537
Likes: 3
From: Chester County PA
St. Jude Donor '08
Le Mans Master
Joined: Aug 2006
Posts: 9,987
Likes: 25
From: If opportunity doesn't knock, build a door. South West Florida / Livin' The Dream
St. Jude Donor '12
Costs vary slightly, but a tranny fluid CHANGE will run about $100, while a FLUSH will run close to $200. My mechanic said he would drain it first, and then if the fluid was dirty and gritty, he would flush it, otherwise he would just change it. I just needed a change. Hope that helps!
Glen
My mechanic said the same thing. I only needed the change since the fluid was in good shape.
Melting Slicks
Joined: Feb 2006
Posts: 3,400
Likes: 3
From: Sarasota Florida
Race Director
Joined: Jun 2005
Posts: 17,640
Likes: 1
From: Lenoir City TN
St. Jude Donor '08-'09-'10-'11
I replaced the transmission fluid at 36K with Mobil 1 synthetic and it also increased the shifting performance, especially the 1st to 2nd but improvement throughout all gears.
Thread Starter
Instructor
Joined: Jan 2007
Posts: 167
Likes: 0
From: Tolland CT
Thanks everybody for the info. I need to bring it in for an oil change so I figured I would change the other fluids while I was there. However, I only have 23k so it sounds like I have some time before changing the tranny fluid or coolant. Thanks again.
Burning Brakes
Joined: Jan 2006
Posts: 900
Likes: 38
From: Waunakee Wisconsin
St. Jude Donor '20
Last edited by waunavet; Jul 9, 2007 at 11:25 PM.
Melting Slicks
Joined: Feb 2006
Posts: 3,400
Likes: 3
From: Sarasota Florida
Administrator
Joined: Mar 2001
Posts: 368,390
Likes: 24,791
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Coolant should be changed at 5 years or 100K miles - whichever comes first. I changed mine at 4 years just to be on the safe side. Probably would do the same for the tranny fluid.
