1st to 2nd Thump

[04MaroonTB]

This is driving me nuts. Everytime I brake to slow down and hit the accelerator the transmission makes a thump to get into 2nd gear. Is this a transmission or u joint problem? If anyone has experienced this let me know what to tell the dealer to look for.
Was there a Technical Bulletin or Recall on this with the TrailBlazer?

I live in Illinois and take mine to Grossinger Chevy for oil changes. Anyone heard any bad things about them?

[Envoy Fan]

Since it happens every time you should be able to take it to the dealer and let them test drive it. If it is there they will feel it. :m2:

[ENVOY2LOW43]

I live in Illinois too but take mine to Grossinger Autoplex in lincolnwood. I never heard any bad things 'bout them. What i can tell you is i have very good experiences with Autoplex. ;)

[MoJoe]

I think it is either the u-joints, or maybe the limited slip unit in the rear if you have one, but it would be the tranny or transfer case also. Take it to the dealer for a check-up under warranty if possible.

[ScarabEpic22]

Mine has done that every since I got it. I know how annoying it is, as I have to on a regular basis slow down for the person who takes forever to turn right and then step on the accelerator and it makes the klunk sound. I wonder if it is normal, as my 99 RX300 does the same thing, but much worse than my TB. :confused:

[tb_ky]

Mine does the same thing...I think it is the u joint because it makes a simalar clunk when you shift into reverse at times.

[chivistb]

I think this is a common thing on almost all the TB's, mine does it too!! :(

[MoJoe]

Mine does not do it, and if it did it would be in the shop right now getting fixed. :m2:

[Blazer2004]

Mine does the same thing> :mad:
Its in the transfer case and is a common thing but not normal.
Mine started @ 7500 miles. I'm sill talking with the dealer to fixed it.
I only have 8100 miles and it is annoying