AT Hard Shifting

Messages
454
Location
Tomball, Texas
Bought a 1996 Chevy 3/4 Ton and the transmission was jerking a little bit when shifting. Put some ZMax in it and now it is jerking harder. Don't know if ATF has ever been changed. Truck has 93,000 miles...
 

pbm

Messages
8,890
Location
New York
Originally Posted By: Colt45ws
I wouldve tried changing the fluid before pouring in some random fluid.
Ditto. I would, however, add a bottle of Lubegard Red after changing the fluid/filter. PS: My local K-Mart has Z-Max A/T treatment on clearance for $5 a bottle. I don't know anything about it but I've had good results with LG Red.
 
Messages
1,723
Location
Virginia
Originally Posted By: Colt45ws
I wouldve tried changing the fluid before pouring in some random fluid.
This. I'd do a drain and fill and see if that starts to smooth it out.
 
Messages
2,500
Location
Dallas, Texas
And here I was thinking Zmax was for engines only. Start doing drain and fills with the correct fluid. You'd probably be best off dropping the transmission pan and cleaning it all out. I'd almost guarantee all work has been neglected to this vehicle.
 
Messages
472
Location
IL
Originally Posted By: rshaw125
Zmax? This is a joke? Right?
duh Well that depends on if he used zMax Trans or zMax engine.
 
Messages
5,445
Location
MTL, CANADA
Originally Posted By: lugNutz
Originally Posted By: rshaw125
Zmax? This is a joke? Right?
duh Well that depends on if he used zMax Trans or zMax engine.
Either way..its Zmax
 
Messages
472
Location
IL
Originally Posted By: Rolla07
Originally Posted By: lugNutz
Originally Posted By: rshaw125
Zmax? This is a joke? Right?
duh Well that depends on if he used zMax Trans or zMax engine.
Either way..its Zmax
This is true... I was speaking theoretically lol.
 
Messages
12,925
Location
Northern Kentucky
I would start by draining the fluid and refilling with Some DexronVI and letting that work for about 1,000 miles and drain it again. Another 1,000 miles drain that and drop the pan, change the filter and start working some Maxlife Dex/Merc in there. No additives needed, but Lubegard red won't hurt. It's got LXE Esters, anti oxidants, Phosporus, and a little friction modifier in it.
 
Messages
8,598
Location
Florida
Flush the transmission using only a high quality ATF. Many additives don't work, and should only be used to get a few more miles from a dying transmission. Z-max may be such an additive. I have heard good thing about using the right Lubegard LXE additive, but I have never been a fan of any oil additive.
 
Messages
5,133
Location
chicago, Illinois
Originally Posted By: mitchcoyote
I am taking it to a transmission shop tomorrow and they are gonna change the filter and fluid....
Good choice, before you put any snake oil in there just do the basics first, which is changing the fluid and filter, many times this solves the problem!
 
Top