Is it ISC or ISL

[Mike Canter]

That is correct on the sumps.

When I last changed my filters I pointed the MH downhill on my driveway and let it sit overnight and only lost about a quart of fluid. I think parking it heading down on my slopping driveway helped a lot and made all the fluid stay at one end of the tranny.

[CoCoDave]

Originally Posted by Robi.1014

When determining which Allison-3000 filters to purchase, I must look at the sump/pan and determine if it is 2" (in which case I order filter-pair "X") or 4" (and thus order filter-pair "Y").....right? First look tells me my Diplomat has a 2" sump. Does that track with engines and trannys that you have?

Robi,

Don't know what sump your transmission has but my Allison 3000 has a 4 inch sump.

FWIW

[Happycarz]

Wannabe,
Thanks for the kudo's on my engine.

[Mr_D]

Originally Posted by Robi.1014

Great help....all of you. Thanks.

Now: to hi-jack my own thread:
When determining which Allison-3000 filters to purchase, I must look at the sump/pan and determine if it is 2" (in which case I order filter-pair "X") or 4" (and thus order filter-pair "Y").....right? First look tells me my Diplomat has a 2" sump. Does that track with engines and trannys that you have?

And from other threads, it's not clear how much Transynd I will lose when removing the filter covers. Because these "filter-covers" are on the bottom of the sump (right?), one would guess that I'll lose quite a bit of fluid.

The 2" pan will take an approx 4" filter, the 4" pan will take an approx 6" filter.
Here's a link to the service tip that will give more info.

[Always-RVing]

I was told by someone who does the tranny maint that you will loose a lot of tranny fluid when you pull the filter covers.

[CoCoDave]

Originally Posted by Happycarz

Wannabe,
Thanks for the kudo's on my engine.

Having seen Happycarz's coach, that could actually be his engine!