IBEAM700

Anyone out there running an after market transmission pan with a drain plug? When changing the fluid and filter it’s a messy job to drain the fluid, plus no matter what I do I can’t get a good seal from the tranny pan gasket. Maybe mine is damaged or warped.
Moroso makes one for the 700R4, but my 1990 has the 4L6E. I don’t think they are interchangeable.

89 Bob L

Check your pan to see if it is warped. I put my pan on the kitchen counter (my wife was not around and it was cleaned) and checked. I then found some warped areas and used a piece of plywood and a 2x4, to put the pan back into shape.

I then replaced the gasket and put it back on the car. DO NOT use any typ of gasket sealant and DO NOT overtighten the bolts.

As far as a drain is concerned. I would recommend installing one.

vettenuts

I looked into aftermarket pans a couple of years back. Then I crawled under the car. In the convertible, I don't think you can fit in an aftermarket pan due to the "X" frame.

Another consideration. I use the miti-vac with the fluid transfer kit and drain the pan through the dipstick holes prior to removing the pan. Much easier then dropping a full pan. You can get the miti-vac setup at Eastwood.

IBEAM700

Thanx for the advice. Here is a link to the Moroso Website the pan im thinking about is 42025. It looks like a hefty pan that wouldn’t warp, but it’s made for the 700R4. I’m not sure if the pans are the same for our 4L60? Anyone?
At 2-3/8 in. deep I think it will clear the X-brace, but ill run down stairs with a tape measure later.

http://www.moroso.com/catalog/catego...?catcode=11201

Muskrat

theres a kit you can get to make your own drain plug with the oem pan i think it $15 i think auto zone has it and maybe jcwhitney

Gearhead Jo in CO

Ibeam, I also had troble sealing up trans pan after changing filter and fluid. Tried rubber, cork, the on 4th try, ordered racing gasket from Jegs and its like hard ruber and its reusable and sealed it up like a champ.

mash557

I saw an ad for a powerglide pan from Stef's and just gave them a call. They advised they should have a 700R4 pan out this winter. I will be 3 inches deep with a drain on the side, fabricated from aluminum. Guy expected price to be in $110 to $140 range. Just for info.

IBEAM700

Okay, I measured the pan on my car, and it is approximately 2-3/8 inches deep. This means the Moroso pan will clear the convertible X-brace. My only dilemma is the 700R4 identification. I looked thru the Factory service manual, and it refers to the tranny as a
700R4 – 4L60E. I’m sure they are the same but if anyone know for sure post it.
Ill contact Moroso today, and see what I can find out.

Muskrat

they are the exact same except the 4L60E has an electronic valve body. same parts, casing, pan,converter, etc.

IBEAM700

I called Moroso, and they told me the 700R4 pan would NOT fit the 4L60E transmission.
Guess ill start looking elsewhere.

DON M

I bought a TCI pan from Jeggs and it wouldn't fit the Convertible. It probably would fit a coupe without the X-brace but the way these cars scrape on speed bumps, do you really want the trans pan to be the lowest point? I would definitely braze in a drain plug while the pan is off. I am thinking about using an outboard filter on my car. It is such a PITA to pull the X-brace off to change the filter.