Power Flush or Drop Pan? - Two good questions.

6Sixathome wrote:So it sounds like the drop and replace is the thing to do. Has anyone tig welded a threaded coupler with a plug on their trans pan for easy draining purposes? Also is synthetic trans fluid the way to go?

Two good questions.

IMO a drain plug is not needed but I believe you can buy replacement pans with them.

I always recommend a complete fluid change-out. That way you are not leaving over 1/2 of the old fluid to dilute the new fluid.

Here is a link to the data bulletin for AMSOIL Low Viscosity ATF for use in GM vehicles (among others). It describes the benefits of synthetic ATF and AMSOIL in particular.

Synthetic Fuel Efficient Automatic Transmission Fluid

Z15 wrote:IMO a drain plug is not needed but I believe you can buy replacement pans with them.

I always recommend a complete fluid change-out. That way you are not leaving over 1/2 of the old fluid to dilute the new fluid.

Here is a link to the data bulletin for AMSOIL Low Viscosity ATF for use in GM vehicles (among others). It describes the benefits of synthetic ATF and AMSOIL in particular.

Synthetic Fuel Efficient Automatic Transmission Fluid

Thanks for the link Z15, looks like AMSIOL is the GOOD stuff!

Hey guys


I want to drop my pan and replace the filter. However I have some questions. The manual says 5 or 6 qts or fluid, but if I only drop whats in the pan, how much exactly will i need? Is the 5 -6 qts for a full fluid change?

Nope. 5-6 quarts is for a pan drop.

fyi...

Note-Books say 5 qts but its always wise to have extra on hand or nearby in case.

2007 CHEVROLET TRUCKS SILVERADO 1500 PICKUP 4.8L 8-cyl Engine Code [C]

CAPACITIES:
Engine, with filter..........6.1 quarts [1]
Cooling System, GMT900 With AT With Elect Fan Initial Fill..........16.9 quarts
Automatic Transmission, 4L60-E Initial Fill..........5 quarts <----Drop pan only
Automatic Transmission, 4L70-E Initial Fill..........5 quarts <----Drop pan only
Automatic Transmission, Total Fill
4 speed 4L60-E..........11.3 quarts
4 speed 4L70-E..........11.3 quarts
Differential, With 8.25 RingGear Front..........3 pints
Differential, With 9.25 RingGear Front..........3.6 pints
Differential, With 8.6 RingGear Rear..........4.3 pints
Differential, With 9.50 RingGear Rear..........5.5 pints
Transfer Case, RPO NP2..........4.1 pints [2]
Transfer Case, RPO NQG..........3.2 pints [2]
[1] After refill check oil level.
[2] Certain 2007 new body style Chevy Silverado and GMC Sierra
light duty pickups may indicate on the Service Parts ID
label (RPO label) that the vehicle is equipped with a RPO
NQG (MP1226) transfer case, however RPO NP2 (MVG261)
was installed instead. The NP2 transfer case can be
identified by a blue label on the lower portion of the case.
The capacities; are NP2 1.9 liters NQG 1.5 liters

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This this info found using link (image) in my signature....

That's a big difference in the quantity of fluid.

So I'm pulling a tranny service on my 03 tomorrow. I'm going to power flush AND swap the filter. I have all morning to baby my baby. So, before I get all romantic, here's my question...

Should I:
Drop the pan, change the filter and then flush?
Flush, then filter?
Pull the filter, flush, then put in the new filter?

I have 16 qts of DexVI standing by. I don't like the way she shifts and I want to get the most bang out of my day. After that I'm going to do the alignment. 8 years and the plastic inserts are still in there.

I have been reading some horror stories on-line on the trans pan removal to do a filter/fluid service for a 02 Silverado 1500 4X4, some postings are going as far as saying you have to drop the exhaust y-pipe and lossen the crossmember and remove the front drive shaft to access the bolts that hold the shift linkage braket inplace and other postings are saying it is a peice of cake. So I bit the bullet and took mine to Chevy(and yes I paid for it), I did not get a chance to ask the mechanic what all was invloved, but then again he is working under my truck 6 ft in the air on a lift, as opposed to laying under it jacked up on stands. If someone would share with me the exact step by step directions as to what is required/needed and needed to be removed(I will be working from jack-stands)I will do it myself next time. 2002 1500 Z-71 4X4 Silverado Ext Cab Short Bed 5.3 Ltr V-8(not the HD not the Flex Fuel) the trans pan has the step in it, so from what I gather that it is the deep pan. Thanks fellow Truck Owners,,, Jim

I wouldn't call it a horror story. You have to disconnect the exhaust to drop the pan. I haven't done it on a 4x4 so I don't know that you have to drop the front shaft but that's just a bit more work if you have to.