Hey guys.
I drive around town in 1st/2nd a lot (gotta love the megashifter for that is this hard on the transmission? Tranny just was fully rebuilt with transgo shiftkit, 2400rpm stall, corvette servo. I am upgrading the tranny cooler next month just to be on the safe side.
am I alright doing this? like bringing first gear to around 4000rpm then shifting etc. when I'm in town? Fromw hat I can tell it'd prolly just cause a bit more heat... which will be fixed with the new cooler.

any ideas?
thanks
garett

 

I think it does more harm then good. To my knowledge, there is more line pressure in first and second so it's hard on parts.

 

oh no! Seriously?! Shat I guess I won't be able to fully enjoy the hooker around town don't get me wrong I love the hooker... I just wish it sounded a louder at low-midrange rpm... when i'm in town (most of my driving) sounds like i'm stock :/

 

Man if only my shifter didn't slip so easily from 1 to D. I might manually shift it more often. Every time I try sliding it a lil into 2, it just goes too far into D. Plus when I shift it, the tranny doesn't exactly engage the gear I just put it in, so not much fun. However I do downshift it to slow down sometimes. And some times I leave it in second, so I can hit the gas, hear that loud exhaust, then let off, and feel 2nd gear slow me down, with that extra rumble of slowing down the engine.

 

chevyluva that's exactly what I do... and I was wondering if that is harsh on the tranny.

I have a b&m megashifter so missing a shift isn't a problem... it was $150.

when the engine slows down when I leave it in 1st or second I can hear a faint whine... not very loud but it sounds kinda cool... like a supercharger almost. the problem with this is, it probably is NOT a good noise... anyone have info on this? i'm gunna replace rear diff. fluid etc. next weekend.

thanks

 

well i have the same shifter and stall but i shift mine all the time around town (unless i get tired) but i also shift right around the same time as if it were in drive. i dont know if it would hurt your tranny but 4000 is pretty high just around town i never see that unless iam racing or just want to get up on it and blow the cob webs out or just to see the shift lite to see if it stills works :sillylol:

 

and as for the winny you hear when you downshift its just the tranny slowing down the motor to that gears RPM range as for it being bad i have never had any probs with it as long as you dont drop it into frist from a high rate of speed (40+) unless you have a transgo kit i hear with them you can run any gear as high as you want or drop any gear from any RPM range.

 

I -think- the trans itself can handle manual shifting, as long as you're not always revving the engine sky-high, BUT, I think the fluid will wear out faster due to the extra heat. 700r4's run hotter than any other trans, due to the design. Heat kills trans fluid, and bad trans fluid kills a good trans. You might want to add a auxiliary trans cooler and an auxiliary remote trans filter. My B&M Supercooler was $45, my Summit remote trans filter was $30. If nothing else, I feel less guilty when I beat on my car on a hot summer day!

 

Part of my "conspiracy theory" is that the automakers are subsidized by the transmission rebuilder associations to include the "manual" shifting option to increase their business. Might as well do a few neutral drops while you're at it

 

I believe it was Tranfixleo that said the line pressure is best in D, manually shifting all the time isn't the best decision, but that's what I do anytime I want to take a little faster since my governor is out of whack.
Megashifter+tach w/shift lite leads to manual shifting

I know what you mean about the hooker, when you rev it up, man it sounds good.

 

Hey 88_RS&86_Z-28...

Is that a pic of you or your girlfriend under your SN? As far as manually shifting your auto trans, up-shifting at "reasonable" RPM's is okay from what I have heard, waiting till 4K RPM's... unless you are racing someone then you are putting un-nessacary strain on your tranny internals. Downshifting... if you want to replace the seals in your trans soon, downshift all you want. The whole idea behind an auto. trans is that it shifts "automatically"!!! What a concept! If you are racing then manually shift it if you want but as mentioned before, the 700R-4's do not immediatly engage into the gear selected so just leave it in D or OD and let the trans do the work for you. Just my .2 cents.

 

What about the rear end? I used to downshift and manually upshift...until I blew the rear and was told it was probably because of the manual shifting.

 

Yes, the manual 1 or 2 raises line pressure. Is it enough to do damage?, not likely. Will it wear parts (the planetaries) a little faster?, Yes. When manually shifting on the upshifts it will in most cases make the 1-2 firmer. Holding it in gear for an extended period of time can make the transmisssion run hotter (especially the planetaries). If you want to drive it like this, then I would recommend my Pro-Fluid at a 50% mix or higher. We use this in all the road racing applications. This helps keep the unit together under extreme use.

 

ProBuilt, the planetaries can wear down? I thought this was "impossible" on an auto trans, besides the obvious neutral-drop or explosion! Can the planetaries be rebuilt?

I want to rebuild a junkyard trans for my car; that would suck if the previous owner melted the gears.

 

I have to admit it i'm adicted to manually shiftiing also. I haven't had any problems with my trany yet and don't count on having any either. The rear end was another story. I was worried about the tranny temps too so i installed a temp guage to keep track of it. Around town maually shifting all the time it never gets above 160.Hammering on the back roads and downshifting like mad it gets to be around 180-190. Any other time it never even gets off 100 degrees. To tell ya the truth I really don't know if this is high or not cause most people don't bother checking their tranny temps. Anybody know whats exceptable? Also i have heard on other post that the cooler isn't used till the converter is locked. Is this true? Pro built any answers? I'm glad to have a knowledgeable trany guy on the boards.

 

I'm pretty sure the cooler's always working.

 

The cooler is always doing its job, and in all the gears?