307 transmission

I've got a 1970 chevelle automatic. Its a four door with the...yes I know...the 307. How do I find out what transmission it has. Is it the turbo 350? Or is it something not so great? can you help me out?

I think its a powerglide. Look at the shifter. If its PRNDL its a powerglide, if its anything else should be a thm350.

cool. I have to buy a new transmission pan. The guy who owned it before me made the car into a lowrider and smashed up the underneath. Thanks for your help.

I think its a powerglide. Look at the shifter. If its PRNDL its a powerglide, if its anything else should be a thm350.

So if someone changed the transmission to say a T350 or T400 the shifter would show that???? No


Blue Bowtie posted the picture that is one way to tell, NOT the shift indicator...:nono:

I had the same car when I was sixteen (20yrs ago). I am pretty sure that mine had a TH350.

Ok give me a break! I was assuming the car was stock, and if it is stock, my advice would be a nice simple way to answer the question without climbing under the car and matching up the pan to the picture.

I guess another good way to tell would be to drive the car and count the shifts.

Looks like the '70 could be had with either a THM or Powerglide.

See http://www.chevelles.com/years/70/power1.html

Ok give me a break! I was assuming the car was stock, and if it is stock, my advice would be a nice simple way to answer the question without climbing under the car and matching up the pan to the picture.

I guess another good way to tell would be to drive the car and count the shifts.

Looks like the '70 could be had with either a THM or Powerglide.

See http://www.chevelles.com/years/70/power1.html
Sorry I wasn't busting your stones , nor did I know you were assuming it was stock? Yes they came with either PG or T350 I thought your were trying to determine which one he had. In which case you would have to climb under the car.
My 69 has a 396 in it and the indicator reads PRNDL, but it has a T400 in it...

I guess you could count the shifts but what if it was a T350 that only shifted into 2 gears ? Again, Not bustong your stones.......but it happens.

I was in a bookstore today and the one Chevelle book I looked at said the 70 Chevelle 6cyl could be had with the Powerglide, the 8s got the THM.

I was in a bookstore today and the one Chevelle book I looked at said the 70 Chevelle 6cyl could be had with the Powerglide, the 8s got the THM.
That's true and all well and good. But lets try and help this guy out and answer his question which is......

I've got a 1970 chevelle automatic. Its a four door with the...yes I know...the 307. How do I find out what transmission it has. Is it the turbo 350? Or is it something not so great? can you help me out?

Unless he knows for FACT it is the original transmission, the easiest way to tell 100% for sure, is look at the pan which has been provided and suggested.

Maybe he is ordering parts for it and needs to know for sure what's IN the car . Not what CAME in the car. I could be wrong but I think that's what he is asking for help on, ID'ing the trans.

Well he seems to have disappeared, and unless if he is going to order parts, he will have to crawl under and look at the thing or take it somewhere and have someone look at it.

I'm just trying to let him know what to expect to find. I agree I may be making a wrong assumption, but I do think it is safe to say that most people who do not know what kind of tranny they have in their car has the stock tranny. If he bought the car from someone who changed the tranny, I'd expect the seller would have told him about any upgrade.

In any event, you and I seem to be the only ones who care anymore, and its not even our car!

Peace.

Well he seems to have disappeared, and unless if he is going to order parts, he will have to crawl under and look at the thing or take it somewhere and have someone look at it.

I'm just trying to let him know what to expect to find. I agree I may be making a wrong assumption, but I do think it is safe to say that most people who do not know what kind of tranny they have in their car has the stock tranny. If he bought the car from someone who changed the tranny, I'd expect the seller would have told him about any upgrade.

In any event, you and I seem to be the only ones who care anymore, and its not even our car!

Peace.

LOL,
I was thinking the same thing.
What kind of car do you have? That little picture it's hard to tell.

Nevermind...I just saw your signature:uhoh: ........that must be the caddy...
You got a 64 malibu also? Click on the link in my sig. We got lots of guys with chevelle's here..:grinyes:

hello every one. sorry for the long delay. I think the most helpful thing is that diagram. i'll still have to crawl underthere and look. I do know that when i bought the car, the guy told me that he had someone rebuild the engine for him. I have never checked the engine numbers. But now I know the only way to tell what tranny it has is to look under the car.

Thanks again every one

ok. Its the TH350

thanks again everyone.:ylsuper:

Makes sense since that's what it came with, don't think anyone would have swapped it out for a powerglide (of course you never know!) and anything newer would have been a more complicated swap (but I'm sure someone would want a 4 speed automatic.)

I've got a '64 with a powerglide. The pic is the Roadmaster.

You see a lot of PowerGlides as an upgrade behind 1,100 HP Pro-Stockers, but I doubt that the car is used for a lot of 7-second runs if it still has the 307...

You see a lot of PowerGlides as an upgrade behind 1,100 HP Pro-Stockers, but I doubt that the car is used for a lot of 7-second runs if it still has the 307...

I had a friend who had a 1972 Malibu 4-dr with a 307 and TH350 - funniest damn thing I saw was his mom who drives a semi - backed the tractor out of a parallel parking spot - right onto the deck lid on the Malibu. Lifted the whole front end of the car about 18" into the air, like something out of a cartoon! Only damaged the decklid but man was that funny to look at.

The car wasn't very quick, but boy did it have good brakes!

My 70 chevelle has a 396 with a TH400, however:

The floor still has a clutch pedal, the console has a huge hole in the hump where a stick was, and the block has the ball shaft for the clutch linkage.

The column shift has a PowerGlide pattern [PRNDL] but a TH350/400 gate (I count clicks) .

* You cannot assume anything after 30-something years -- the tranny PAN is the only way to know for sure.

mine's a 307 and it had the th350 and apparently all had the th350 cause they didnt have the power to need the th400