Putting truck in neutral

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07-19-2004, 03:21 PM

#11

James B.

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Quote:

Originally Posted by Yelo

When you take the transmission out of drive you are dis-engaging the front pump....

The front pump is powered by the converter hub. It turns at the same rpm as the crankshaft.

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07-19-2004, 03:23 PM

#12

Yelo

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Quote:

Originally Posted by James B.

The front pump is powered by the converter hub. It turns at the same rpm as the crankshaft.

are you SURE......I was explained to by the dealership that it WAS NOT (is it possble the 4L60 and 4L80 are different in the aspect ???)

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07-19-2004, 03:25 PM

#13

Stroker 1500

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im pretty sure as long as the engine is on there is always line presure no matter where the gear selector is

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07-19-2004, 03:33 PM

#14

James B.

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Quote:

Originally Posted by Yelo

are you SURE......I was explained to by the dealership that it WAS NOT (is it possble the 4L60 and 4L80 are different in the aspect ???)

Yes, I'm sure.

The only gray area here is the version of the 4L60-E used in the hybrid trucks. Option code M33. These are the ones that have an electric generator/motor sandwiched between the flexplate and torque converter. (These engine also have no conventional starter.) This trans has an electric pump in the pan to supply line pressure when the truck comes to a stop and the engine shuts off. Even in this trans the front (main) pump is driven by the converter hub.

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07-19-2004, 05:11 PM

#15

Tokez420

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Quote:

Originally Posted by 00silverado327

My dad has this habbit of putting his car in neutral (its an automatic transmission) when at a stop light, or if stopped anywhere for more than a few seconds. He says its easier on the transmission...I was wondering if anyone knew if this is true, and why?

i do this after i brake hard...that way i dont create a hot spot on the rotor while stopped.