Fluid change question - Chevy and GMC Duramax Diesel Forum
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post #1 of 6 (permalink) Old 12-14-2009, 07:32 AM Thread Starter
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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.
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post #2 of 6 (permalink) Old 12-15-2009, 08:31 AM Thread Starter
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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.
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post #3 of 6 (permalink) Old 12-15-2009, 08:49 AM
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I'd drain the fluid and put new in at 100k

CURRENT: 2006 Silverado 2500HD 4x4 crew cab (black), 20" chrome Diamo 16 Karat wheels wrapped with 33x11.5 Cooper Discoverer ATPs, 2" wheel spacers, Bilstein 5100 series shocks, Banks Ram-Air Intake, custom straight pipe exhaust w/5" tip, PPEI dsp5 tuned by Kory, Edge Insight moniter, 8k HIDs in head/foglights, Limo tint, 7" Pioneer Double-din, (2) Boss Phantom 12s in custom box, more coming soon...

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post #4 of 6 (permalink) Old 12-15-2009, 01:41 PM
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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.
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post #5 of 6 (permalink) Old 12-15-2009, 03:37 PM Thread Starter
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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.
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post #6 of 6 (permalink) Old 12-15-2009, 03:44 PM
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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.--- Jerry
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