nighthawk15

Haha, looks like somebody went thread diggin I ended up getting some god ol' Dex III from Napa. Seems to work great

Nightrydass

i have another question; is there a mileage limit that you shouldn't change the fluid in the T56? I have 87K miles on my car and im NOT the origional owner. I change my rear diff every 6K miles, i want to do my Tranny but im afraid of causing an issue since it has higher milage and i don't think it has ever been changed before (i put 40K miles on the car, i never did it atleast). what do you guys think?

Ryanmgaspard

iTrader: (6)

I just put in GM Dextron 6. I'm not sure if it makes changing gears easier yet because my master has air in it. It does make the transmission ALOT more quieter than the GM Dextron 3.

stevied916

iTrader: (30)

I use costal ATF and it works great. It's $8 for the big jug and says it's rated for late ford and gm that require dex3 and dex4

PowershifterNC

GM Synchromesh

purplepumpndump

I have a T56 in my 06 goat. At about 7k I put in RP. AT approximately 20k 5th and 6th gear died. After a lot of problems finding a dealer to honor the warranty I got a new T56. After I got the car back, I put RP in it again thinking the problem was unrelated. At 5k on the tranny I put in Chevron non-syn ATF and it shifts better. Hope I saved it in time cuz the warranty is dead now after blower, engine swap etc etc

Looking back, I have to say the RP may have been responsible.

vdubbing337

I was talking to a GM tech yesterday and he said not to but dextron 6 in as it is not compaitable and you will mess up the synchros

Carter01

iTrader: (11)

Dex III all the way.

Ryanmgaspard

iTrader: (6)

The GM tech told me it replaces all the old Dextron fluids made by GM. The back of the bottle says safe for all GM vehicles.

alihamza

I have RP in my tranny right now and its not very impressive, it makes its harder to get into the gears. I'm going to switch back to ATF. What fluid do you guys recomened?

Jontall

Subject: Manual Transmission Fluid Usage In 2007 And Prior Manual Transmissions And Transfer Cases - keywords case fluid manual transmission transfer



Models: 2007 and Prior Passenger Cars and Trucks

2007 and Prior HUMMER H2

2007 HUMMER H3

2007 and Prior Saturn Passenger Cars and Trucks




--------------------------------------------------------------------------------



--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Use of manual transmission fluid part number 88861800 U.S. (88861801 Canada) in place of Dexron III.

Important Note: If the vehicle owners manual lists Dexron VI as the recommended transmission, transaxle or transfer case fluid disregard any information supplied in this PI. Use eSI and or the vehicle owners manual to determine what type of fluid should be used prior to referencing the below information

Recommendation/Instructions:
Manual Transmission fluid part number 88861800 U.S. (88861801 Canada) is currently available through GMSPO. Current and past model vehicles listed above with either a manual transmission or transfer case that REQUIRE Dexron III should use the above listed manual transmission fluid. This fluid is a direct replacement for Dexron III in manual transmissions and transfer cases. DO NOT use Dexron VI in place of the manual transmission fluid in any manual transmissions or transfer cases as a failure may result.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Ryanmgaspard

iTrader: (6)

If I read that right it says its ok....?

zlover129

iTrader: (10)

just switched over to amsoil 2 days ago, pricey **** but worth it imo, shifts noticeably smoother, and my tranny has right at 96K miles on it now

davered00ss

iTrader: (4)

Do not use Royal purple, it will eat up the blocker rings.

intake68

iTrader: (5)

Its NOT okay to use DexVI in your car. As the tsb states dexIII is replaced with GM part# 88861800 which is a manual tranny fluid.

Please read the last sentence in the first paragraph under reccomendations/instructions to validate....

89camaroiroc

okay i hear alote of crap is the t56 good or not?i have a 91 z28 with a carbed 383 edelbrock crate motor 460/460ftlbs and i need a different trans well want a different trans t56 looks good plus ive heard that at 80 it's at 1600rpm is this true?the 700r4 is going to poo any day now

GTOPalmer329

iTrader: (1)

royal purple here

Storms of War

I've been running Royal Purple for a while now and my tranny isn't doing so well. I've heard that swapping back will fix the problem if you catch it in time, so that's what I'm gonna do. It sucks because I can shift my car with my index finger now thanks to the RP. The regular stock **** is notchy and I hate it with every shred of life in my body, but I guess it's either use that or rebuild a transmission

CORNER CARVER

Out of the GM Service Manual for GM dealers online manual set to 04 CTS-V:

Lubrication Specifications
Application Manual Transmission Fluid

Specification

(GM part No. U.S.: 88861800, Canadian: 88861801)
3.45 liters Metric
3.65 quarts English

06black6spd

so does that mean that the GM sythetic fluid is not good? Are all sythetic fluids bad for a T-56? I put the GM sythetic in it a few hundred miles ago...