What's a spinon filter?

[tomseeley]

Dumb newbie question: I have a 2002 Sierra 2500HD duramax/allison. I've read some good messages about maintenance intervals, including at least one that says I should change the "spinon filter" regularly. I know it's part of the Allison, but I can't find it mentioned by that name at all in my GMC diesel owners manual. Pls enlighten me! Thx.

[DaZ]

i think its refering to the spin on filter on the transmission instead of having it inside the tranny

[SilveradoWV]

Yup, it looks like an engine oil filter, just smaller and apparently alot more stuff inside because they are quite heavy for their size.

[MS3DALE]

i think its refering to the spin on filter on the transmission instead of having it inside the tranny

 

 

 

 

 

Yep,Thats what they are referring to,The spin-on external filter,But they do still have an internal filter also and that should be changed on a regular basis too.

[SilveradoWV]

I thought I read on Allison's site that the internal filter needs to be replaced only at a rebuild...?

[SilveradoWV]

From Allison's website:

 

"Q. Filters - How many filters are there and when do they need to be changed?

 

A. The Allison 1000 Series™ uses two filters to maintain cleanliness of the Automatic Transmission Fluid (ATF). There is a 'spin-on' filter that is externally accessible and is intended to be changed at each ATF change (see owners manual for recommended change intervals). Current P/N for this filter is 29539579. Because this is a relatively 'high pressure' spin-on filter, it is important to tighten the filter one full turn after the gasket contacts the transmission case. Also, there is a removable magnet between the filter and the transmission housing; care needs to be taken that the magnet doesn't get 'thrown away' with the old filter if it happens to stick to the old filter. Beginning with MY03, GM Truck is recommending that the spin-on filter (filter only; not transmission fluid) initially be changed at 7,500 miles. Following that, the filter and fluid should be changed at the recommended intervals.

 

The other filter is inside the transmission oil pan, and is intended to be changed only in the event of an overhaul."

[MS3DALE]

OK let me refrase that...I would change it on a regular basis,I can't see going through all the work of changing the fluid and the external filter and not changing the internal one also.

Just my opinion,plus I am anal when it comes to changing fluids and filters