B body help with transmission

65 SD L79 · Canadian Poncho Superstar!

B body help with transmission

pontiax · Poncho Master!

I went with a 700r4 with 3.70 gears out back. Ive read were it was suggested to use 3.55 gears but everyone regretted not going to 3.70 or 3,73 or better all around street drive ability you will end up with a final drive ratio of 2.61 where as with a 3.50 you end up with 2.45 final ratio. It doesnt sound like much but it will lug the engine at lower rpm . . My two cents. And go with a lockup torque convertor with a bypass switch.Im running a 2400 stall with a lockup switch connected to the 4 gear pressure port.

-- Edited by pontiax on Tuesday 30th of June 2020 07:07:15 AM

4SPEED427 · A Poncho Legend!

What are you looking for out of the car Kevin? Will it be a "performer"with a modified engine, or just a cruiser with a stock 427?

I would think a 427 with a stock engine will easily handle something like a 3.31 or 3.55 gear with overdrive because they offered 2.29 and 2.56 gears behind the 427's in 1969. Also, stock wheel and tire combination? (height?)

65 SD L79 · Canadian Poncho Superstar!

just a mild cam at most. more off no reving at hwy speed then out of the hole. The rest of the car will be factory stock. tires may be just a bit taller

65 SD L79 · Canadian Poncho Superstar!

Pete, nice to see yours make car of the month. One of my favs for sure on this site

66 Grande guy · Canadian Poncho Superstar!

For info my 66 396 has a 700r4 with the stock 3:31's and with that setup I get about 2300 rpm at about 120 kph with more or less stock tire height.

Still lots of go power and reasonable mileage. (like 20-21 MPG)

Heres proof.

87 player bird · Poncho Master!

Hey Kevin, finally starting to enjoy some of that rollin iron, eh?

65 SD L79 · Canadian Poncho Superstar!

87 player bird wrote:
Hey Kevin, finally starting to enjoy some of that rollin iron, eh?

Long time no hear from. How is every thing

65 SD L79 · Canadian Poncho Superstar!

66 Grande guy wrote:
For info my 66 396 has a 700r4 with the stock 3:31's and with that setup I get about 2300 rpm at about 120 kph with more or less stock tire height.
Still lots of go power and reasonable mileage. (like 20-21 MPG)
Heres proof.

That sounds like what Im looking for

66 Grande guy · Canadian Poncho Superstar!

That one mod really transformed the car into an all around long distance cruiser. I also used it to pull a 21 foot Airstream to Winnipeg from Northern Alberta with no problem. (Just didn't use the Overdrive for the pull)

I have to say though that I have never tried smoking the tires with it. I think its quite capable of it, I just don't seem to want to anymore considering how much it took to put it together and how old some of the components are.