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03-06-2018, 03:45 PM
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#1
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Senior Member
Join Date: Jan 2018
Location: SARASOTA, FL
Posts: 290
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What Transmission Do I Have
Just took possession of a 2002 Terra with an 8.L Vortec. I want to service the transmission (fluid and filter change out) but am not sure if I have an Allison Transmission. I've got the original invoice but the transmission type is not listed. I've searched the VIN number and there appears to be no code that indicates if the transmission is an Allison. Sooooo, how do I determine if the transmission is an Allison and what model? Thanks. 
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2002 - Fleetwood Terra 32, 8.1 L; 496 Vortec GM on a P32 Workhorse chassis. 2014 Ford Fiesta SE , AT as my TOAD.
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03-06-2018, 03:49 PM
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#2
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Climb underneath and find the manufacturer/serial # plate if nothing else works.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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03-06-2018, 03:54 PM
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#3
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Senior Member
Join Date: May 2013
Location: Ontario, California
Posts: 2,429
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If no one can help, call the GM customer service line at: 800-222-1020 and ask them.
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[SIGPIC][/SIGPIC]2016 Newmar Dutch Star 4369
Newmar Owners Club
USAF 1966-1969,- Law Enforcement 1969 - 2003, Retired since March 2003
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03-06-2018, 04:04 PM
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#4
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Senior Member
Monaco Owners Club National RV Owners Club Workhorse Chassis Owner
Join Date: Dec 2013
Location: St. Charles MO
Posts: 4,920
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Quote:
Originally Posted by Fredk20716
Just took possession of a 2002 Terra with an 8.L Vortec. I want to service the transmission (fluid and filter change out) but am not sure if I have an Allison Transmission. I've got the original invoice but the transmission type is not listed. I've searched the VIN number and there appears to be no code that indicates if the transmission is an Allison. Sooooo, how do I determine if the transmission is an Allison and what model? Thanks. |
Can you find out if it's a W-series chassis, if so try going to the Workhorse Chassis forum and ask. Ed Gray should know the answer if he sees the post. You could probably take a photo someone will recognize it. If so you may see an Allison oil filter on it.
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2002 Monaco Windsor 40PST 2019 Equinox 1.5L, Blue OX Aventa LX tow bar, Roadmaster EZ5 baseplate, SMI Stay-In-Play Duo, TireSafeGuard TPMS
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03-06-2018, 04:42 PM
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#5
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Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: Mar 2011
Posts: 6,766
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Fleetwood built the coach, call them and give them the VIN, they can tell you what the trans is. Then get the serial number off the trans and call the manufacturer.
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2014 American Eagle 45T
DD 13, 500 HP
Pulling a Honda CRV
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03-06-2018, 11:27 PM
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#6
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Aug 2002
Location: Clovis, CA, USA
Posts: 13,136
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Go underneath and look for two spin on oil filters.
The Allison 1000 transmission has a spin on oil filter, usually orange and it's fairly small compared to the engine oil filter.
If you only have one spin on oil filter it's not an Allison 1000 transmission.
Get back to us and we'll tell you how to service your Allison 1000 if it is that model.
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2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
Criticism is easier than Craftsmanship
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03-07-2018, 04:49 AM
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#7
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Senior Member
Join Date: Aug 2015
Posts: 6,959
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Fredk20716-
There's a thread from 2015 about this topic. Read the whole thread, but here's a place to start (in the middle).
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Mark
2008 Holiday Rambler Admiral 30PDD (Ford F-53 chassis)
2009 Honda Fit Sport
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03-07-2018, 06:41 AM
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#8
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Senior Member
Join Date: Oct 2015
Location: Brighton, MI
Posts: 775
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Quote:
Originally Posted by LJowdy
If no one can help, call the GM customer service line at: 800-222-1020 and ask them.
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2002, Workhorse built the chassis, not GM. As mentioned, look for small spin on filter, driver's side. Also you can look underneath and see if there is a trans pan drain plug. The Allison trans will have a drain plug. A GM 4L80E will not.
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Hank & Lynda
2003 Winnebago Adventurer 35U, Workhorse W22
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03-07-2018, 02:47 PM
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#9
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Senior Member
Join Date: Jan 2018
Location: SARASOTA, FL
Posts: 290
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OK, crawled under the unit and took these photos. Don't see an exterior filter or Allison on the pan. So can someone ID this as an Allison? Thanks!
__________________
2002 - Fleetwood Terra 32, 8.1 L; 496 Vortec GM on a P32 Workhorse chassis. 2014 Ford Fiesta SE , AT as my TOAD.
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03-07-2018, 03:04 PM
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#10
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Senior Member
Monaco Owners Club National RV Owners Club Workhorse Chassis Owner
Join Date: Dec 2013
Location: St. Charles MO
Posts: 4,920
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No sorry I don’t think so. That pan looks totally different.
__________________
2002 Monaco Windsor 40PST 2019 Equinox 1.5L, Blue OX Aventa LX tow bar, Roadmaster EZ5 baseplate, SMI Stay-In-Play Duo, TireSafeGuard TPMS
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03-07-2018, 03:20 PM
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#11
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Senior Member
Join Date: May 2014
Posts: 1,368
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Looks like a 4L80E GM trans.
DTW
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Dan & Loretta, US Army Retired Aero Scout Pilot
2012 Fleetwood Providence 42P Class A/DP
Spartan Chassis, 8.9L Cummins 450HP
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03-07-2018, 07:04 PM
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#12
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Senior Member
Nor'easters Club Holiday Rambler Owners Club
Join Date: Oct 2016
Location: Monadnock Region of New Hampshire
Posts: 1,519
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Quote:
Originally Posted by Dtwallace
Looks like a 4L80E GM trans.
DTW
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I thought the same thing. A picture of the left (driver's) side of the transmission body and I can tell you for sure if it is.
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My name is Peter, and I'm never going to grow up.
- Winnebago Era 2010 Class B
- Holiday Rambler 2006 Ambassador 40-DFD Class A
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03-08-2018, 04:41 PM
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#13
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Senior Member
Join Date: Jan 2018
Location: SARASOTA, FL
Posts: 290
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After some back and forth with Fleetwood and Workhorse confirmed it is an 4L80E. By the way the pics are from the drivers side. Thanks all.
__________________
2002 - Fleetwood Terra 32, 8.1 L; 496 Vortec GM on a P32 Workhorse chassis. 2014 Ford Fiesta SE , AT as my TOAD.
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03-10-2018, 12:56 PM
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#14
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Senior Member
American Coach Owners Club
Join Date: Jul 2007
Location: SW Florida
Posts: 2,971
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Quote:
Originally Posted by Fredk20716
After some back and forth with Fleetwood and Workhorse confirmed it is an 4L80E. By the way the pics are from the drivers side. Thanks all.
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Yeah.....and gotta wonder if an Allison was ever installed in a P32 chassis.
__________________
07 Revolution LE 40E_1 1/2 Baths_Spartan MM Chassis_06 400HP C9 CAT_ Allison 3000
Dinghy_2010 Jeep Wrangler JKU ISLANDER
1998 36ft. National Tropi-Cal Chevy Model 6350 (SOLD)
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