Fluid change question - Chevy and GMC Duramax Diesel Forum
Transmission Shop Discuss the Allison OEM, aftermarket, and the ZF-6.

LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 12-14-2009, 07:32 AM Thread Starter
Join Date: Dec 2009
Location: Sulphur, LA
Posts: 3
Fluid change question

I have a 2006 Chevy 2500 hd with the Allison transmission. I have 78,000 miles on the vehicle, most highway mileage. I do pull a 31' travel trailer about 3 times a year. I have not yet changed the transmission fluid yet, although the spin one filter has been changed every 5,000 miles. I have heard different ones say if the fluid isn't bad then don't change, you can do mor harm changing than not.
My question is will it do more harm than good to change the fluid now?

Side note - would be going back with the recommended DEXTRON fluid. The company I work for takes care of all the filter changes. All filters, oil, fuel, trans, all get changed every 5,000 miles. They use the Dextron fluid....don't want to mix fluid types.
Jason Levron is offline  
Sponsored Links
post #2 of 6 (permalink) Old 12-15-2009, 08:31 AM Thread Starter
Join Date: Dec 2009
Location: Sulphur, LA
Posts: 3

I just had my truck serviced by our company mechanics and the trans fluid is just as red as if new. No filings in the filter or on the magnet.
We are a Crane and rigging company and have serveral trucks that have the Allison 1000 series trany in them. As a company we use Baldwin filters for everything oil, fuel, trany, air. These are all changed every 5,000 miles. So, every five thousand miles or so I get a 1/4 quart fresh tran fluid. Figure over the 16 filter changes ive got about 4 quarts fresh trany fluid.
Jason Levron is offline  
post #3 of 6 (permalink) Old 12-15-2009, 08:49 AM
DuramaxForum Enthusiast
ChevyDMax89's Avatar
Join Date: Apr 2008
Location: Ocala, FL
Posts: 3,528
Send a message via AIM to ChevyDMax89
I'd drain the fluid and put new in at 100k

2006 Silverado 2500HD 4x4 crew cab (black), 20" chrome Diamo 16 Karat wheels wrapped with 32x11 Toyo Mud Terrains, 2" wheel spacers, Bilstein 5100 series shocks, Banks Ram-Air Intake, custom straight pipe exhaust w/5" tip, EGR Delete, Cat fuel filter mod, PPEI dsp5 tuned by Kory, Suncoast Gmax 6 w/1056 converter, Edge Insight moniter, 8k HIDs in head/foglights, Limo tint, 7" Pioneer Double-din, (2) Boss Phantom 12s in custom box, more coming soon...
ChevyDMax89 is offline  
post #4 of 6 (permalink) Old 12-15-2009, 01:41 PM
DF Sponsors

mrmanners's Avatar
Join Date: Mar 2009
Location: Kathleen, GA
Posts: 10,542
Send a message via Skype™ to mrmanners
I agree with ChevyD. I switched mine over to AMSOIL Torque Drive just after I bought it. It is the same formulation as Transynd.

Just my two cents.
mrmanners is offline  
post #5 of 6 (permalink) Old 12-15-2009, 03:37 PM Thread Starter
Join Date: Dec 2009
Location: Sulphur, LA
Posts: 3
I would switch to synthetic but since my company takes care the filters and fluids don't want to mix them. We have a couple of fuel trucks that take a way worse punishing than my truck they are on the road all day every day, always loaded and all they do is change the filter every 5000 miles and they have over 100k miles on them never had any trany problems. They have the same trany.
Jason Levron is offline  
post #6 of 6 (permalink) Old 12-15-2009, 03:44 PM
jc1843's Avatar
Join Date: Jun 2008
Location: So. Cal
Posts: 16,149
Send a message via AIM to jc1843
I agree- just let them keep changing it-- cannot beat FREE!

Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets.
jc1843 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy and GMC Duramax Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome