My 2004 G35C has 5K miles and has always been difficult to downshift into first while rolling. Grinds and refuses most times unless almost at a complete stop. If I double clutch I can smoothly shift while rolling, otherwise I must come to a complete stop. Never seen this on any of my other cars (all manual tranny's).

Thanks for any feedback...

 

dont ever down shift into first again!! only from a stop !! or if ur barely movin..and i mean barely !!

 

Why would you need to downshift to 1st. Ive done that probably a handful of times but this is also my 1st manual transmission. I only use 1st to get going from a stop other than that im never in that gear. I have tried to go into 1st when rolling slowly and it is difficult so I just avoid it unless im stopped.

 

Why would you want to shift down to first?
Considering these cars can launch ok from 2nd gear.

I never go down to first unless I'm in a complete stop or parking lot crawl. It's waaay too short of a gear.

(ah you beat me to it barthelb )

Anyhow I'm just curious: What did you drive previously Wreckless? What was the gearing? mostly 5mt's???

 

Omg, rofl......I only "downshift" at about 2 miles an hour, most of the time I just feather the clutch in second, no reason to go to first....

 

1st gear is pretty tall....i dont know why you would down shift to it approaching a corner.......i have gone from 2nd to 1st but in s l o w traffic rolling. if you are over 10 mph there is no reason 2nd isn't the better gear. i bet even the hair pin @ monte carlo could be pulled off in 2nd......slowest corner in F1

 

No syncros on first...that's why rev matching/double-clutching helps out.

 

Ok, I only downshift to first gear when approaching a full stop. I'd never downshift to first while under power. My other car is an 2002 RT/10 Viper. My old trade in was a 2003 SRT/4. Before that were two ACR Neons. All manuals and all didn't have this quirk. Before the Neons I had Dodge Conquest TSI, Dodge Omni GLH Turbo, AMC SX/4,1969 SixPack Super Bee, 1970 SixPack Challenger R/T, 1969 383 Super Bee, and a 1974 360 Roadrunner...all were manual tranny cars. Like I said, other than classic cars I haven't seen a modern nonsynchroed 1st gear car. Live and learn.

 

Only time I ever downshifted into 1st was when I auto-x. Like hitting chicago boxes and pivot points. 1st gear would grind here and there, but I assume that is normal if you don't rev match.

 

this is exactly true, you need to rev match if you down shift into first, I do it all of the time with no problems.

 

Yes ... there absolutely are are synchros in first.

Respect
JET

 

+ 1 billion 3mph or less. otherwise it wont shift. i think the tranny is protecting itself from synchro wear. plus 2nd gear is the lowest you'd need to go if you were racing anyways....which is when you;d really need to downshift quickly