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Old 04-24-2009, 10:38 AM   #1
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1996 30' Land Yacht
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What type of Transmission on a Gas 96 30' Land Yacht?

I cant seem to find out what type of Transmission our 96 Gas 30' Land Yacht has... no manual...

Thanks..

ML
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Old 04-24-2009, 11:09 AM   #2
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It is most likely an Allison. The Allison doesn't have a parking pawl, but uses the parking brake as a park gear. If you don't mind sliding under your motor home, a quick look at the rear of the transmission, where the parking brake drum is, will tell you. An Allison will have a hydraulic pump that moves the praking brake cable. A THM type transmission will have a simple cable that goes up to the driver's side where the parking brake lever is. Also, an Allison will probably have a button for the parking brake on the dash, versus a hand lever.
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Old 04-25-2009, 08:31 PM   #3
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Originally Posted by overlander63 View Post
Allison will probably have a button for the parking brake on the dash, versus a hand lever.
Button is a large yellow pull switch, on most ly that I have seen.
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Old 04-25-2009, 11:59 PM   #4
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Quote:
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Button is a large yellow pull switch, on most ly that I have seen.
That would be the one, generally denotes an Allison under the floor.
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Old 05-09-2009, 05:41 AM   #5
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According to my Workhorse chassis guide the allison trans. was not introduced untill late 2004. Prior to that it was GM 4L8E turbo-hydromatic. The chassis guide is a free download on the website. If you have not done so you should register with Workhorse. You will need your chassis vin to register.
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Old 05-09-2009, 08:04 AM   #6
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According to my Workhorse chassis guide the allison trans. was not introduced untill late 2004. Prior to that it was GM 4L8E turbo-hydromatic. The chassis guide is a free download on the website. If you have not done so you should register with Workhorse. You will need your chassis vin to register.
1-No one said he had a Workhorse chassis.
2-I replaced the parking brake pressure switch on a '96 Land Yacht with an Allison transmission at the Florida State rally in 2004.
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Old 05-09-2009, 12:14 PM   #7
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Sorry; just trying to help. I dont see where it says the type of chassis.
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Old 05-11-2009, 03:38 PM   #8
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1996 30' Land Yacht
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GM chasis.... I just know the park brake wont engage, I had a gentleman look, he told me I needed a new transmission and wanted to try and order one, but first needed to find out what kind.... next dilemma is where?
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Old 05-11-2009, 06:42 PM   #9
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If you have a GM trans, it's likely the rear seal has gone (common) and fluid is getting into the parking brake housing and trashing the shoes.
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Old 05-11-2009, 07:32 PM   #10
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If you have a GM trans, it's likely the rear seal has gone (common) and fluid is getting into the parking brake housing and trashing the shoes.
I agree. If that's the only thing wrong with it, I don't see why it would need a new transmission. The repair is not that tough, unless there's a secret I don't know about, the transmission doesn't even need to come out of the truck.
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Old 06-08-2009, 04:57 AM   #11
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Repairing the transmission mounted parking brake

This is (tranny mounted parking brake) a throw back to older truck systems. It is really not a big deal to repair any portion of the parking brake system. If the transmission is working properly (when full of fluid) you CERTAINLY don't need a new transmission.

To get to everything, loosen the two intermediate driveshaft hanger bolts (first shaft hanger AFTER the transmission) and than remove the four driveshaft flange bolts to transmission output companion flange http://static.zoovy.com/img/racerwal...fff/m4851a.jpg and desengage drive shaft (might take a small pry bar to release it from the flange). Than finish removing the intermediate hanger bolts and lower drive shaft to ground. (may want to have a freind under the coach when you do this)

Release the parking brake handle in the coach and tap (gently) the parking brake drum off of the output flange.

Remove the linkage to the brake pawl actuator (clevis pin) and remove spring hardware and brake shoes. (shoes may be sent to local brake reliner for pad relining) Now for the hard part. You will need a PROPER sized socket (there is no standard size) with PROPER circumference relief ( a thin wall design will work if you can fine one) to remove the companion flange from the transmission output shaft. It is splined to the shaft and may be somewhat cantankerous to get off.

With the companion flange off of the shaft you are ready to remove the mounting/backing plate for the parking brake (usually 4 bolts) and than the transmission rear tail shaft housing.

This is a representative layout of your mechanism.
http://i14.photobucket.com/albums/a3...7/dscn1432.jpg and here is a drawing view http://www.fordification.com/images/...seomatic02.jpg

Once the tailshaft housing is removed you need to have a transmission shop install a new seal AND housing bushing.The seal without the bushing will do you no good and the leak will still be there soon after the repair is made.

Once you have all this done you need to take a look at the companion flange seal wear surface. That is the bright shiny machined surface in the above picture. If the surface has a groove worn into it the new seal will probably leak also. A new companion flange is not cheap but the seal surfaceMUST be dealt with before reinstallation. They have specialty repair sleevs to install over the old worn area of the seal surface that will restore the seal surfcae to new condition. Speedi-Sleeve shaft repair kits They cost in the area of 10-12 buck wereas a companion flange will run you at least 85-100 bucks.

With all the new parts gathered it is time to replace everything in reverse order. Adjust the parking brake to drum clearance with the drive shaft remover so that you can "feel" the lining drag on the drum in order to keep from getting the brake too tight and causing then lining to heat up and chrystalize.

Good luck.

The Deuceman
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Old 06-17-2009, 10:19 AM   #12
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Thanks for all you guys help.. I think we got it fixed now...
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Old 06-18-2009, 03:25 PM   #13
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OKAY, TELL us what was wrong so that we can test the efficacy of the advise here.

The Deuceman
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