Issues After Changing Trans Fluid

Issues After Changing Trans Fluid Rate Topic:

#1 mgenin

Rude Crude and Pre-Chewed

Group: Members
Posts: 75
Joined: 10-August 04

Posted 10 August 2010 - 09:36 PM

Hi there,

Got a 95 lumina 3.1... was running perfect. I changed the trans oil and fitler with mobil 1 dex 6... and afterwads i have been having some issues. After the car warms up real good, it seems to hesitate when you accelerate from stop, or at low speed... Usually it occurs after driving at low speeds, and after being driven on the express way. Sometimes, it drives just fine! the check engine light comes on sometimes, but the code won't save in the car...the light comes and goes as you drive the car.

Any ideas? I put a GM filter in.

Thanks.

-Mike G. (95 Lumina LS 3100)

#2 nitehawkjcb

Respect my Authoritay!

Group: Moderators
Posts: 4,220
Joined: 21-June 04

Posted 10 August 2010 - 09:49 PM

Did you put enough fluid in it? I think it takes ~7 quarts. I'm sure you used transmission fluid, not gear oil, right?

#3 me6894

I bleed Cheese Wiz

Group: Members
Posts: 6,528
Joined: 16-March 05

Posted 10 August 2010 - 09:59 PM

Did you make sure you seated the filter and seal all the way into the transmission? If not, you will suck up air and that will cause slipping and eventually (read: quickly) burn up your clutches. This is assuming of course that you checked the fluid level properly (car running, warm, after being run through the gears).

Also, I wouldn't use dex 6, especially a synthetic on a transmission that old. The newer dex 6 fluid is a little "slippier" than dex 3 and wasn't really designed for the older transmissions even though gm says its ok.

mstrjon32, on Mar 4 2009, 08:38 AM, said:

L67 swap makes the panties drop.

#4 MiKe0589

Uncle Ben

Group: Members
Posts: 268
Joined: 24-September 07

Posted 10 August 2010 - 11:45 PM

me6894, on 10 August 2010 - 10:59 PM, said:

Also, I wouldn't use dex 6, especially a synthetic on a transmission that old. The newer dex 6 fluid is a little "slippier" than dex 3 and wasn't really designed for the older transmissions even though gm says its ok.

I seen nothing but improvement when i went to dexron VI last year. This year i added a shift kit and toped it off with the same fluid and it's outstanting.

If anything i would have to say dexron III is "slippier" then dexron VI because of that lack of friction material that VI now has. Just my .02.

From GM:

Improvement over dexron III

Clutch friction stability -- improved 100 %
Clutch Durability due to fluid -- Improved 120%
Oil Film Thickness -- Increased 20%
Fluid Oxidation -- Improved 100%
Foam Aeration -- Improved 150%
Shear Stability -- Improved 200%

But i would still take that with a grain of salt.

1998 Monte Carlo LS, Dark Carmine Red Metallic.
P&P 3400 UIM, LIM, And TB. Custom FWI. / Descreened MAF.
Polyurethane Dogbone Engine Mounts. Custom Shift Kit. / Dexron VI.
GMPP Front And Rear STB's. SS Rear Brake Lines.
Dyno Tuned. 180*T-Stat. Taylor ThunderVolt 8.2mm Spark Plug Wires.