Another Noob question. Transmission shifting - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rebelmedic · 07-22-2009, 11:27 PM

Ok, I know its weird.

I swear I can not feel my transmission shifting. I believe it is the stock tranny, is this normal, I am considering adding a tach, any thoughts?
1970 C-10

Thanks guys lol (I feel stupid)

'72customdeluxe · 07-22-2009, 11:35 PM

Do you mean it shifts smoothly or doesn't shift at all? If #1, drain the pan and add some type-f transmission fluid from any auto parts store. I did a couple days ago and it REALLY shifts now

'72customdeluxe · 07-22-2009, 11:36 PM

And a tach is always a good thing to have

Rebelmedic · 07-23-2009, 02:07 AM

Im not sure, It doesnt sound like the motor is straining, i just can't feel it shift like in other trucks I have owned

'72customdeluxe · 07-23-2009, 02:13 AM

What trans? Powerglide, th350, th400? Like I said before, if you really want to feel the shift (again guessing you are talking about soft shifts, not a non-shifting tranny), go to the auto parts store and get 3qts (if you have a th350 like me) of Type-F transmission fluid and a pan gasket. Dump the pan, seal it back up, put the new in. Like a shift kit in a bottle.

69GMCLonghorn · 07-23-2009, 09:56 AM

If your fear is that it isn't shifting, try manually shifting as you accelerate. You should feel something... If you don't, time to get a nice 700R4 with a shift kit that'll bark the tires at half throttle!! (Hey, I think big, it's what I do!).

mclairmo · 07-23-2009, 12:57 PM

I would think that if it is stuck in 1st or some other gear, you would be able to clearly tell. Either your engine will be revving at 5000 rpms on the freeway (if stuck in 1st gear) or you will have no accelaration (if stuck in 2nd or 3rd). You should also be able to hear the engine drop its revs at each shift. Open the window and listen while accelerating. Stock transmissons are not supposed to be hard shifting. Buyers of these trucks, when they were new, would probably complain. I think the goal of GM was to make the trans shift as smoothly and quietly as possible. The problem is that this smoothness creates wear every time the trans shifts (due to built in slippage). I have a shift kit in my street/strip TH400 and it shifts pretty hard but I like it. Hard shifting means less slippage which is better for trans life.

07-22-2009, 11:35 PM	#2
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: Another Noob question. Transmission shifting Do you mean it shifts smoothly or doesn't shift at all? If #1, drain the pan and add some type-f transmission fluid from any auto parts store. I did a couple days ago and it REALLY shifts now __________________ '72 cheyenne super step, '05 long bed gmc

07-22-2009, 11:36 PM	#3
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: Another Noob question. Transmission shifting And a tach is always a good thing to have __________________ '72 cheyenne super step, '05 long bed gmc

07-23-2009, 02:07 AM	#4
Rebelmedic Registered User Join Date: Jul 2009 Location: Bakersfield Ca Posts: 15	Re: Another Noob question. Transmission shifting Im not sure, It doesnt sound like the motor is straining, i just can't feel it shift like in other trucks I have owned

07-23-2009, 02:13 AM	#5
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: Another Noob question. Transmission shifting What trans? Powerglide, th350, th400? Like I said before, if you really want to feel the shift (again guessing you are talking about soft shifts, not a non-shifting tranny), go to the auto parts store and get 3qts (if you have a th350 like me) of Type-F transmission fluid and a pan gasket. Dump the pan, seal it back up, put the new in. Like a shift kit in a bottle. __________________ '72 cheyenne super step, '05 long bed gmc

07-23-2009, 09:56 AM	#6
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: Another Noob question. Transmission shifting If your fear is that it isn't shifting, try manually shifting as you accelerate. You should feel something... If you don't, time to get a nice 700R4 with a shift kit that'll bark the tires at half throttle!! (Hey, I think big, it's what I do!).

07-22-2009, 11:27 PM	#1
Rebelmedic Registered User Join Date: Jul 2009 Location: Bakersfield Ca Posts: 15	Another Noob question. Transmission shifting Ok, I know its weird. I swear I can not feel my transmission shifting. I believe it is the stock tranny, is this normal, I am considering adding a tach, any thoughts? 1970 C-10 Thanks guys lol (I feel stupid)

07-23-2009, 12:57 PM	#7
mclairmo Registered User Join Date: Jan 2006 Location: Take Off Posts: 1,908	Re: Another Noob question. Transmission shifting I would think that if it is stuck in 1st or some other gear, you would be able to clearly tell. Either your engine will be revving at 5000 rpms on the freeway (if stuck in 1st gear) or you will have no accelaration (if stuck in 2nd or 3rd). You should also be able to hear the engine drop its revs at each shift. Open the window and listen while accelerating. Stock transmissons are not supposed to be hard shifting. Buyers of these trucks, when they were new, would probably complain. I think the goal of GM was to make the trans shift as smoothly and quietly as possible. The problem is that this smoothness creates wear every time the trans shifts (due to built in slippage). I have a shift kit in my street/strip TH400 and it shifts pretty hard but I like it. Hard shifting means less slippage which is better for trans life.



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