00TAM6

is manual shifting a 4l60e tranny bad to do for the tranny? if im racing from a dig and i put it all the way down to first and shift up before it redlines will i cause any problems to the tranny? or even if im at a 10mph roll n i do the same will it effect the tranny? or should i just leave it in D?

Ellsworth

I always leave it in third.

get a stall, and just leave it in third, unless your highway racing.

00TAM6

I will get a stall eventually. Is manual shifting bad for the tranny?

Ellsworth

I would say to a certain point it would wear more than usual..

I believe the 3-4 clutchs are very week on the 4l60e's I use to downshift mine a lot.. and i had to rebuilt the tranny. now I just leave it in third. i really do not think theirs any advantages when racing from a dig to put it in first, than shift to second.. but from a 30 roll first gear i think its about at 5k with 3.42 gears like i have, and the *** end just gets sideways even with 555'rs.

so to answer your question.. yes it does wear on the transmission quicker than normal.. but as long as your not downshifting i think you will be alright. if you feel the need to want to shift that much.. just go buy a 6speed car.. if you race a lot and you have weakspots in your RPM range, than i would HIGHLY suggest a stall.

00TAM6

thanks. yeah im just going to focuse on getting a high stall and a tranny cooler.

Tainted

iTrader: (9)

down shifting will destroy a 4l60e fast. upshifting not so much. However jsut leave it in D. the computer knows and can shift much quicker than you can.

invest in the biggest trans cooler you can also, it will greatly prolong the life of your trans. a cooler is a MUST for a stall!

RevGTO

iTrader: (12)

Upshifting is not a problem, and downshifting can be ok as long as you rev match. I up shift manually on the street sometimes where traction can be an issue to avoid the automatic upshift-downshift scenario if I spin. I downshift from OD to 3rd from time to time when I want to avoid lock-up (lock-up is tuned out in third).

RyanJM

Mine worked great after a tune it holds every gear to 6000k at wot. Downshifts and upshifts hard and faster than before the tune even the couple times I shifted it.

willizm

iTrader: (10)

sometimes if I'm going from a stop up to about 20 and want to nail it I'll put it in 2nd at the light. Start to roll out up to 20-30mph and then nail it. I just click 2 up straight to d and ride out the automatic shifts while wot. Good for if you are roll racing someone and trying to let them take the hit. Also, I have a 3600 stall so I don't have lockup until 50mph with my tune.

Kevin01Z28

iTrader: (8)

Manually downshifting into any gear other than 3rd isn't good. I don't see how manually upshifting could be a problem. I've done it to avoid an early 1-2 shift due to traction, but thats it. There was a thread about this a few weeks ago, couple of sponsors put their opinions in.

willizm

iTrader: (10)

but if you are starting from a stop and put it in second, then up shift when rolling it's not so bad right? I could see it being a strain if you were rolling at 50 and put it down into 1 or 2, but from a stop I wouldn't think it would be that big of a deal. Thoughts?

Kevin01Z28

iTrader: (8)

I dont see how its any different to let the computer to shift, or for you to manually hold it in gear a little longer, then let the computer shift. When you manually downshift with your foot off the gas, line pressure will be way lower than when the computer determines a downshift. 4-3 manual downshift isn't a problem, two of the main transmission builder's on here recommend doing that. 4-2 forced downshift, or 4-1 is tough on your tranny...

ericwilloughby

I broke an input sprag with 600wtq and a very hard 1-2 shift at the track using D. My trans builder said.if u shift manualy the low reverse clutches stay engaged and spreads the load inside the trans..