Guys , last year when I first got my 1983 300cd I had trans flare , I did valve body spring kit and refilled the box with regular dex/merc auto parts crappy stuff ... that was the fix .
Thats was in for a year and not a problem .
I had some good mobil dex/merc and did a trans service feeling I should have put the good stuff in .
Good stuff is in and now it's slipping second to third if I am on it hard ...once the trans warms up its fine .
I guess I am going back to the cheap stuff ...I still have a half a case of the stuff I put in last year .

Its like a cheap date that likes Mc'Ds ...LOL

__________________
1983 300cd

You should fix the transmission instead.

http://www.superior-transmission.com/products/shift_correction/722A_diesel.htm

I reckon he already tried? but have you tried changing back to cheapo stuff? I use it- I just RR it every year.

I used NAPA dex III fluid about a year ago. Im about to change it again and probably use that same stuff, I couldn't tell any difference between the fluids.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

I was told that any Dexron III rated Transmission Fluid will do.

With that said, I stopped by Walmart just to check if they have anything rated at Dexron III. I found this Supertech brand trans fluid that can be used Universally on Dexron III and other stuff.... Would any of you get this? Or should I just stop by the Autozone close to home and pick up something more specific?

__________________
It's not the years, it's the mileage.

You can get a gallon of generic Dex III at AAP for $8. How much cheaper do you want?

I use the wal mart stuff. no issues so far

__________________
83 300SD Dark Silver Dark brown inside

I did the spring kit ... I have been running for the past few days , once its warmed up its fine ... I'm going to dump the mobil and I still have 6 qts from the case last year with I put the spring kit in .
I had a 2001 F350 and you could not run the dex III in the transmissions , they were blowing up .
I can stand into WOT and she's fine once its warmed up ... I'll keep you posted .

Thanks guys

__________________
1983 300cd