SilverDiesel

i have a used truck and it feels like my transmission has a pretty hard shift pattern. The 1-2 is a stiff jerk and 2-3 is only a little softer under mild acceleration. this is compared to another cummins i drove. i'm wondering if there are any telltale signs that show there has been previous transmission mods. i'm dumb with auto tranmsmissions so any info is appreciated.

dcwm

Have you had the fluid changed and bands adjusted? I discovered that these two things can make a world of difference.

SilverDiesel

i've had the fluid changed...can i adjust the bands myself?

Shovelhead

It's not a hard job.
Adjusting Transmission Bands

Just make sure you have an inch pound torque wrench.
I picked mine up from Sears.

Ed

AlpineRAM

[quote author=SilverDiesel link=board=4;threadid=20844;start=0#msg195573 date=1065849470]
i have a used truck and it feels like my transmission has a pretty hard shift pattern. The 1-2 is a stiff jerk and 2-3 is only a little softer under mild acceleration. this is compared to another cummins i drove. i'm wondering if there are any telltale signs that show there has been previous transmission mods. i'm dumb with auto tranmsmissions so any info is appreciated.
[/quote]

Maybe you could ask the seller if he had a shift kit installed. I second the idea of verifying band adjustment.
The description of a 1-2 shift being harder than the 2-3 shift sounds a tad funny to me. What was the condition of your old fluid like- burnt, debris etc? Or just nice'n clean?

AlpineRAM

SilverDiesel

i had the diesel mechanic at the dealership replace my tranny fluid. He said it was fine, not burnt and no water.

James Lucas

Sounds like it shifts like my DTT

James

dcwm

[quote author=SilverDiesel link=board=4;threadid=20844;start=0#msg195977 date=1065994712]
i had the diesel mechanic at the dealership replace my tranny fluid. He said it was fine, not burnt and no water.
[/quote]

Did the mechanic offer any suggestions as to what the prob. is? Did he adjust the bands? Is the prob. better?

Inquiring minds want to know

SilverDiesel

i had the fluid changed when i first got the truck a 1/2 year ago. it was just recently that i got a chance to drive another cummins so it just caught my attention a bit.

FreightTrain

Shoot!!!

Sounds like it shifts like mine also.