wjschill
Texas
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Joined: 11/18/2020
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We have a 2007 Chevy HD 2500 truck that we bought new. We pulled and lived in a fiver for three years.
I had the tranny serviced every 25,000 miles while towing, and since, every 50,000 not towing.
The truck has 226,000 miles on it. It started showing signs of leakage a few months back, and I assumed it was the front seal. I added fluid as needed.
I decided to take it in to a tranny shop. They tell me that even though it (allison) has a spin on filter, there is also one a located inside the pan.
So, those of you that want a complete tranny service, you might want to consider pulling the pan for the internal filter as well.
Hope this helps with those with the Duramax/Allison combo.
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KillingTime
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ArchHoagland
Clovis, CA, USA
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What model Allison transmission?
The Allison 1000 has a spin on filter and an internal filter. Allison says never change the internal filter unless you are rebuilding the transmission.
They also say to NEVER do a power flush on the Allison 1000.
2004 Monaco La Palma 36DBD
Workhorse W22 8.1 Gas Allison 1000, 7.1 mpg
2000 LEXUS RX300 FWD 22MPG 4020 LBS
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JaxDad
Greater Toronto Area
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How is this a Class A issue, maybe consider moving the post?
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rgatijnet1
Florida
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Many Class A RV's have an Allison transmission.
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Lwiddis
Near Bishop, California
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After 226,000 miles with many of them pulling a heavy RV, I think your transmission has given good service.
Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AMP Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad
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Bruce Brown
Northern NY
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rgatijnet1 wrote:Many Class A RV's have an Allison transmission.
Correct.
There are 24 hours in every day - it all depends on how you choose to use them.
Bruce & Jill Brown
2008 Kountry Star Pusher 3910
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Ray,IN
IN, USA
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rgatijnet1 wrote:Many Class A RV's have an Allison transmission.
None to my knowledge have a 1000 series though. The internal "filter" is a fine screen, it is not a true filter.
And so, my fellow Americans: ask not what your country can do for you — ask what you can do for your country.John F. Kennedy 20Jan1961
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ArchHoagland
Clovis, CA, USA
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Ray,IN wrote:rgatijnet1 wrote:Many Class A RV's have an Allison transmission.
None to my knowledge have a 1000 series though. The internal "filter" is a fine screen, it is not a true filter.
Ray...My Monaco class A definitely has an Allison 1000 transmission.
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rgatijnet1
Florida
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Any of the larger chassis RV's(like Safari, Monaco, Holiday Rambler, etc) with the 8.1L GM engine had the Allison 1000 transmission. The smaller chassis with the 8.1L engines had the GM transmissions.
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wallynm
Los Alamos NM
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So who did the servicing every 25,000 or 50,000 miles. Did or do you use Allison specified approved synthetic transmission fluid
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