I was thinking of using mobil 1 tranny fluid when I put my 2400 stall tc and ext. cooler.. anyone think this is good or bad? also wondering how much I would need. I have the tci deeper pan plus the stock cooler and then the larger cooler that I'm adding. I'm just wondering how many litres the sucker will take. the stuff is like $8/litre canadian.

 

Looots!
What are the stock fluid capacities for the 700R (not just the pan, but entire system)? Something like 12 liters? Feel free to correct me if I'm wrong.
If you just want to drop the pan, and change the filter, it's going to need about 5 liters seeing as you have the deep pan. Obviously in this case, you'll end up with about 35% synth fluid in the tranny, and about 65% conventional. Which is probably fine, but not a complete swap to synth.

If you want to flush it I would probably use about 13-14 liters.
Whiiiiich by my math equates to $104 to $112 CDN. I remember at my old lube shop, we used to charge roughly $200 for a synth tranny flush.

 

BTW, I use the same stuff in my T-5, and that bastard is dieing as fast as it can. Everytime I change the fluid, it's totally silvery with all the metal shavings. I've also broken the snap-ring on 5th gear (which is probably not the fault of the fluid).

 

Dana at Probuilt Automatics says stay away from Mobil synthetic ATF. Preferred brand is AMSOIL (I think he says Redline is okay, too).

I have a fellow racer who has gone through 3 trannies a season the last 3 years. He insists on using Mobil 1 ATF.

 

I'm starting to think maybe I should just stick with the stock gm stuff. I just thought since I was going to be changing the tc and my pan has a drain plug on it and I know the filter only has about 5000kms on it .. other reason was that I was going to just run a big ext tranny cooler and not use the one in the rad at all.. so I figured synthetic would not get thicker when the weather got cooler out.. guess I'll stick with the regular stuff and run it back through the int. cooler to normalise the temp..

 

I've run Amsoil in my tranny from day one of the install and won't use anything else. She never gets hot (course I've got a big @ss cooler) and I've never had any issues with it.

'Sides the initial cost that is.

S.

 

Go with the AMSOIL. It really is worth it.

www.amsoil.com