New Transmission Costs

[N7turbo]

There can't be anything wrong with RTV if that is that Mazda uses and calls for.

 

[AL Cx5]

There can't be anything wrong with RTV if that is that Mazda uses and calls for.

RTV seals, it's labor intensive to clean. It all has to be scrapped each time the trans is serviced. Mazda tried to seal it for life. LOL

IF the RTV is removed, an important step, then a gasket will work. I'll be cussing a scraping at the 30K mi mark and installing a gasket.

"If Mazda uses it" I'd still be using those boat anchor wheels, crap tires, struts, springs, sway bars, bushings and dusting/squeaking front brake pads....

BUT for those who want to go by the BOOK, RTV is your friend....

 

[Lazy2.5]

RTV seals, it's labor intensive to clean. It all has to be scrapped each time the trans is serviced. Mazda tried to seal it for life. LOL

IF the RTV is removed, an important step, then a gasket will work. I'll be cussing a scraping at the 30K mi mark and installing a gasket.

"If Mazda uses it" I'd still be using those boat anchor wheels, crap tires, struts, springs, sway bars, bushings and dusting/squeaking front brake pads....

BUT for those who want to go by the BOOK, RTV is your friend....

Lmao

 

[Lazy2.5]

I like the stock struts on my Mazda 6! The rears are still original and work great!

 

[AL Cx5]

I like the stock struts on my Mazda 6! The rears are still original and work great!

RTV will work "great" too....scrape, scrape!

https://www.amazon.com (commissions earned)

 

[ColoradoDriver]

I've heard from two different sources to use RTV (gasket paste), not a pan gasket. I'm kind of lost now.

Yeah, me too.

 

[AL Cx5]

Yeah, me too.

Have you hear the gasket is leaking ATF?

Here are two trans gaskets I use. The one on the left is for a 48re. It has NEVER leakes. The reusable gasket on the right fits a Nag1 transmission pan. It does not leak.

My 48re is due for a 30K mi ATF change this week. I will be using the gasket on the left without any RTV. I'll torque to 120 in lbs. These bolts are easy to strip....

I found but 71 to 97 INCH #s for Mazda pans. These maybe smaller bolts than the Domestic 48re. I'll do 80 in lbs, go for a drive, get the trans warm and go for +90 INCH lbs.

 

[GFrosty]

Here are two trans gaskets I use. The one on the left is for a 48re. It has NEVER leakes. The reusable gasket on the right fits a Nag1 transmission pan. It does not leak.

@AL Cx5 --

Do you have a particular brand name/model of gasket you use? The 48RE transmission isn't on the Mazdas, but perhaps they make a Mazda CX-5 variant.

 

[AL Cx5]

@AL Cx5 --

Do you have a particular brand name/model of gasket you use? The 48RE transmission isn't on the Mazdas, but perhaps they make a Mazda CX-5 variant.

The gasket on the left, on post #47, came with the Wix trans filter. I forget who made the reusable on the right. You are right, 48re is a heavy duty trans to go behind high torque Cummins diesels.

Another trusted source is Feltpro.

Neither Wix or Feltpro offer trans filters or gaskets for newer Mazda's, yet.

For me, I'm not stressing on the gasket manufacturer. I'll stress more about getting two surfaces free of RTV. A small amount of RTV left on either surface could provide a leak path. I might spring for a new trans pan. We will see how flush and lazy I feel at the 30k mi mark.

Tomorrow, the pan comes off the Domestic 48re for an ATF and filter change. Part of the charm of a 48re are the antique kickdown bands that require being tightened 70 # inch. THEN loosen it 1 7/8 rotations. 7/8 of a rotation, go figure. 230k I messed up a band service and refreshed. Now at 280k, time for another ATF and filter change. This one should go well past the 500k mi mark.

 

[ruthrj]

Great thread! I never noticed a change in transmission behavior on my old ‘13 2.0L. It performed great it’s whole life when I did 3 drain and fills at 50k miles, and 3 drain and fills with a pan drop and filter change at 100k miles. I used RTV to reseal the pan without issue. I didn’t plan to drop the pan again.

Now that I have the 2.5T, I’ll likely drop the pan and replace the filter at 30k miles with a single drain and fill of the fluid. I’ll use a gasket on the new CX-5 vs RTV. Will likely do subsequent drain and fills at 30k miles, maybe a pan drop every 60k miles. Gasket will be useful for that. Scraping and cleaning the pan mating surfaces is a PITA and I don’t care for popping a RTV pan off the transmission. Have to be really careful not to gouge or pry at the transmission body, aluminum is soft! : )

 

[ColoradoDriver]

Great thread! I never noticed a change in transmission behavior on my old ‘13 2.0L. It performed great it’s whole life when I did 3 drain and fills at 50k miles, and 3 drain and fills with a pan drop and filter change at 100k miles. I used RTV to reseal the pan without issue. I didn’t plan to drop the pan again.

Now that I have the 2.5T, I’ll likely drop the pan and replace the filter at 30k miles with a single drain and fill of the fluid. I’ll use a gasket on the new CX-5 vs RTV. Will likely do subsequent drain and fills at 30k miles, maybe a pan drop every 60k miles. Gasket will be useful for that. Scraping and cleaning the pan mating surfaces is a PITA and I don’t care for popping a RTV pan off the transmission. Have to be really careful not to gouge or pry at the transmission body, aluminum is soft! : )

Yeah if I do end up trying this myself, I am inclined to try the gasket myself and since I plan to own this car long-term still, make it easy for any future pan drops.