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Towing RWD Manual Tranny Trucks. #4752003
05/09/18 12:43 PM
05/09/18 12:43 PM
Joined: May 2005
Posts: 2,215
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,215
Toronto, Canada
--with the rear wheels down. Any time a two company tows a medium duty truck with the rear wheels down, the tow truck driver disconnects the rear driveshaft. Would it not be easier, for short tows of under a few miles, to leave the driveshaft in place, engage top gear, and depress the clutch pedal all the way with a pedal depressor? Countershaft turns and tranny internals get lubricated. The clutch release bearing is very beefy on these trucks and should be able to handle the clutch load for about fifteen minutes.

Sure beats lying under the truck by the side of a busy highway disconnecting the driveshaft.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752008
05/09/18 12:51 PM
05/09/18 12:51 PM
Joined: Jan 2017
Posts: 1,586
VW Fanboy Island
maxdustington Offline
maxdustington  Offline
Joined: Jan 2017
Posts: 1,586
VW Fanboy Island
I would assume they are trying to not damage their customer's gear as much as possible. There is no liability when you pull the driveshaft.

What happens if the release bearing is on it's last legs and that does it in? The off chance the depressor is not set correctly or gets knocked off? Different procedures for manuals v autos? An excellent way for an inexperienced employee to cause catastrophic damage.


03 Jetta AWP/09A 205k kms
Edge 0W40 + Mann 719/30
Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752017
05/09/18 01:05 PM
05/09/18 01:05 PM
Joined: Jun 2005
Posts: 11,418
Santa Barbara, CA
bdcardinal Offline
bdcardinal  Offline
Joined: Jun 2005
Posts: 11,418
Santa Barbara, CA
Plus they get to charge more to pull the driveshaft.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752029
05/09/18 01:24 PM
05/09/18 01:24 PM
Joined: Dec 2005
Posts: 3,008
The Canyons
02SE Offline
02SE  Offline
Joined: Dec 2005
Posts: 3,008
The Canyons
Disconnecting the driveshaft is quick and removes any possibility of damage if your scenario goes wrong.

Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752313
05/09/18 07:13 PM
05/09/18 07:13 PM
Joined: May 2013
Posts: 2,094
Saskatchewan, Canada
Johnny2Bad Offline
Johnny2Bad  Offline
Joined: May 2013
Posts: 2,094
Saskatchewan, Canada
Broadly speaking it's about distance to be towed; if it's short (a few miles) it's OK to tow in Neutral Gear, clutch engaged. If the distance is for any distance, say, beyond 5 miles or so, disconnect the driveshaft.

I would guess that the owner's manual for the towed vehicle almost certainly addresses the issue, refer to it and follow the recommendations.


'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]
Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752472
05/09/18 10:24 PM
05/09/18 10:24 PM
Joined: Apr 2010
Posts: 191
Detroit
Kurtatron Offline
Kurtatron  Offline
Joined: Apr 2010
Posts: 191
Detroit
Why is it bad to tow in neutral gear? I never heard of such a thing as towing in neutral might cause damage to a red vehicle. What will happen for extended towing?

Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752590
05/10/18 05:42 AM
05/10/18 05:42 AM
Joined: Dec 2013
Posts: 3,989
Manchester, England
Olas Offline
Olas  Offline
Joined: Dec 2013
Posts: 3,989
Manchester, England
Just put it in neutral. Anyone who drives a manual knows this


Cable ties should hold it
Re: Towing RWD Manual Tranny Trucks. [Re: Olas] #4752644
05/10/18 07:17 AM
05/10/18 07:17 AM
Joined: May 2005
Posts: 2,215
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,215
Toronto, Canada
No, any one who drives a manual DOES NOT know this.

When the counter shaft rotates the gears on the counter shaft, which are submerged in oil, transfer the oil to the mating gears on the output shaft and this oil lubricates the gears and the bearings on the output shaft. In neutral none of the gears on the output shaft are locked on to the output shaft, so none of the gears are turning and there is no oil reaching the output shaft. So we have the output shaft turning with no lubrication if the truck is being towed. I would not like to tow a vehicle any more than a kilometre with no oil being fed to the output shaft.

Here is a quote from the Owners Manual of my Sierra RWD pickup truck "Two wheel drive vehicles should not be towed with all four wheels on the ground. Two wheel drive transmissions have no provisions for internal lubrication while being towed."

With 4WD and the transfer case in neutral, the tranny output shaft is not turning and the truck can be towed.

To add to my original post, the release bearing is not rotating if the engine is not rotating, so there is no concern about damage to the release bearing if the truck is towed with the clutch pedal depressed.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752687
05/10/18 08:02 AM
05/10/18 08:02 AM
Joined: Oct 2010
Posts: 1,582
stl
MarkM66 Offline
MarkM66  Offline
Joined: Oct 2010
Posts: 1,582
stl
Does transmission fluid leak out when the driveshaft is removed, and front of vehicle raised up?

Re: Towing RWD Manual Tranny Trucks. [Re: MarkM66] #4752714
05/10/18 08:33 AM
05/10/18 08:33 AM
Joined: May 2005
Posts: 2,215
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,215
Toronto, Canada
In the specific case I was discussing - medium duty trucks - no, because the driveshafts are multipiece, there are three or even four shafts coupled together and the rearmost shaft, which is being disconnected, just slides out of the stand alone slip joint which has grease in it.

It would be an issue with my Sierra pickup where the one-piece shaft slides into the rear of the transmission. With light duty vehicles they do not bother disconnecting driveshafts, they use tow dollies if necessary. Now, with more rollback tow trucks, they just load the entire vehicle on to the tow truck.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Towing RWD Manual Tranny Trucks. [Re: Olas] #4752794
05/10/18 09:48 AM
05/10/18 09:48 AM
Joined: May 2005
Posts: 2,215
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,215
Toronto, Canada


This is from the video Shannow posted in the Synchromesh Explained thread. This picture should help understand how the output shaft is lubricated.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752905
05/10/18 11:15 AM
05/10/18 11:15 AM
Joined: Apr 2010
Posts: 191
Detroit
Kurtatron Offline
Kurtatron  Offline
Joined: Apr 2010
Posts: 191
Detroit
So does that mean driving a 2wd rwd car in neutral with the clutch disengaged is in principal the same thing as towing in neutral?

Re: Towing RWD Manual Tranny Trucks. [Re: Kurtatron] #4752936
05/10/18 11:44 AM
05/10/18 11:44 AM
Joined: Jan 2008
Posts: 3,991
Guilford, CT
exranger06 Offline
exranger06  Offline
Joined: Jan 2008
Posts: 3,991
Guilford, CT
Originally Posted By: Kurtatron
So does that mean driving a 2wd rwd car in neutral with the clutch disengaged is in principal the same thing as towing in neutral?

Basically, yes. However that's not really an issue, as it takes several miles of towing before any damage occurs, and you would never drive for several miles in neutral with the clutch disengaged.


2006 Ford Ranger Sport
1992 Honda Accord EX
2004 Honda CR-V LX
1994 Ford Bronco XLT (project)
2011 Cadillac Escalade ESV (wife's)
Re: Towing RWD Manual Tranny Trucks. [Re: George7941] #4752947
05/10/18 11:58 AM
05/10/18 11:58 AM
Joined: Dec 2006
Posts: 7,791
Toronto, Canada
KrisZ Online happy
KrisZ  Online Happy
Joined: Dec 2006
Posts: 7,791
Toronto, Canada
What would anyone use neutral and keep the clutch disengaged at the same time?


2015 Dodge Grand Caravan-27k miles.
2006 Mazda 3-163k miles
Re: Towing RWD Manual Tranny Trucks. [Re: KrisZ] #4752963
05/10/18 12:16 PM
05/10/18 12:16 PM
Joined: Jan 2008
Posts: 3,991
Guilford, CT
exranger06 Offline
exranger06  Offline
Joined: Jan 2008
Posts: 3,991
Guilford, CT
Originally Posted By: KrisZ
What would anyone use neutral and keep the clutch disengaged at the same time?

Exactly. Like I said, not a concern...


2006 Ford Ranger Sport
1992 Honda Accord EX
2004 Honda CR-V LX
1994 Ford Bronco XLT (project)
2011 Cadillac Escalade ESV (wife's)
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