Will pulling a truck in neutral ruin transmission???
#21
The issue with flat towing an automatic and having the driveshaft in is the driveshaft will rotate the output assembly. Depending on the unit it can and will damage the low roller, the rear planets, sun gear and other rotating hard parts as there is no lube flow. Also, the driveshaft yoke and related bushing can overheat due to lack of lubrication.
Many transmissions do not have output lube flow in Neutral, regardless of whether the pump is turning or not.
The issue has nothing to do with the clutches, it is a related to lubrication fluid flowing to the output assembly. Think about it, in the clutch pack there are lots of times during the operation of the unit that a given element (clutch pack) is not applied, and they do not burn up during that tie they are not. That is not the concern here.
Manual transmissions are not affected as they typically are a splash lube system.
Hope that helps the discussion.
g
Many transmissions do not have output lube flow in Neutral, regardless of whether the pump is turning or not.
The issue has nothing to do with the clutches, it is a related to lubrication fluid flowing to the output assembly. Think about it, in the clutch pack there are lots of times during the operation of the unit that a given element (clutch pack) is not applied, and they do not burn up during that tie they are not. That is not the concern here.
Manual transmissions are not affected as they typically are a splash lube system.
Hope that helps the discussion.
g
#22
TECH Apprentice
iTrader: (4)
Join Date: Oct 2004
Location: Sugar Land, TX
Posts: 394
Likes: 0
Received 0 Likes
on
0 Posts
The issue with flat towing an automatic and having the driveshaft in is the driveshaft will rotate the output assembly. Depending on the unit it can and will damage the low roller, the rear planets, sun gear and other rotating hard parts as there is no lube flow. Also, the driveshaft yoke and related bushing can overheat due to lack of lubrication.
Many transmissions do not have output lube flow in Neutral, regardless of whether the pump is turning or not.
The issue has nothing to do with the clutches, it is a related to lubrication fluid flowing to the output assembly. Think about it, in the clutch pack there are lots of times during the operation of the unit that a given element (clutch pack) is not applied, and they do not burn up during that tie they are not. That is not the concern here.
Manual transmissions are not affected as they typically are a splash lube system.
Hope that helps the discussion.
g
Many transmissions do not have output lube flow in Neutral, regardless of whether the pump is turning or not.
The issue has nothing to do with the clutches, it is a related to lubrication fluid flowing to the output assembly. Think about it, in the clutch pack there are lots of times during the operation of the unit that a given element (clutch pack) is not applied, and they do not burn up during that tie they are not. That is not the concern here.
Manual transmissions are not affected as they typically are a splash lube system.
Hope that helps the discussion.
g
I still roll my M6 in neutral a lot when I'm approaching a stoplight.
#24
On The Tree
iTrader: (12)
Join Date: Jan 2006
Location: Wichita Falls
Posts: 177
Likes: 0
Received 0 Likes
on
0 Posts
to be on the safe side, i always pull the driveline loose from the rearend and just tie it up, no fluid lost. on this particular model, pulling the truck in neutral with the engine running would not hurt it since the pump is turning. you can also burn up manual trans by pulling them with the driveline in place. yes the top shaft is turning, but its not the bottom one where the fluid is located. my shop lost a $5500 NV 6spd trans due to a lazy wrecker driver who towed the truck 200 miles with the driveline in place and seized the bearings on the mainshaft. and as for pulling the 94-02 old body style dodge ram crossmember, it is necessary to spread the frame approx 1/2" to get the 8 bolts out.
#25
Teching In
iTrader: (7)
So what about all the old people with huge RV's pulling suv's and cars that you damn well know aren't manual tranny cars? Do they really have the driveshafts pulled then reinstalled as they pull their car around the country?