I have a 08' and lately the transmission has been hard shifting between 2nd and 3rd. Does the transmission need to be flushed? This only happens when I initially start driving than it's fine. It may be nothing, but since its certified I am going to have them look at it.

 

You don't flush a manual transmission.. you do a drain and fill.

Most likely your problem is the infamous third gear issue which has the following symptoms of which, one, a combination, or all may be present:

o Hard to shift into third gear.
o Grinding when attempting a shift into third gear.
o Popping out of third gear after a shift.

You can either take your car in for the TSB or you can elect to do a drain and fill with GMSFM (General Motors Synchromesh Friction Modified) fluid, part #12377916 as most on this site who have had these problems have done. Do a search on this magic in a bottle and you will turn up a wealth of information. Here's a copy of the text of the TSB posted by Turbonut:


TSB 08-018

TSB Number: 08-018 NHTSA Number:10026204 TSB Date: July 18, 2008 Date Added to File: October 7, 2008
Failing Component:
Power Train: Manual Transmission

SYMPTOM:
The 6-speed manual transmission grinds when shifting into 3rd gear, pops out of 3rd gear, or is hard to shift into 3rd gear.
NOTE: These symptoms can be intermittent and sometimes more noticeable in colder climates.

PROBABLE CAUSE:
The transmission has a faulty 3rd gear synchronizer or 3-4 shift sleeve.

CORRECTIVE ACTION:
Replace the 3rd gear set.

 

Paul, I think he has an automatic. His Original Post is very unclear.
OP, please make sure you identify which transmission you have, the 6speed manual or the 5at.
Thanks.

 

Good point. I think I just saw "manual" and figured that was what he had.

 

automatic

 

First start with some fresh fluid in the tranny, if you don't wanna use redline, then at least get the new Honda DW-1 over the Z1. Or I think IHC used to use Mobile 1 in his tranny. Either way get some good fresh fluid in there, then depending upon mileage, maybe your pressure switches.

How does it shift in full auto versus the sport shifting?

 

I just got an 08 auto trans cert pre-owned and am noticing the same thing. I haven't been driving long enough to know if goes away after I've driven it for a while. I have about 51k miles on it. Owned the car about 3 weeks and am unimpressed with the transmission smoothness. I think mine works better when i control the shifting versus in auto only mode. Could it be anything mechanical?

 

Same problem actually. I had the transmission replaced 2 weeks ago and its still doing it. Luckily it was covered under warranty.

Anyone else having this problem with an auto?