jjpape

I currently own a 1965 cutlass with a 330 ci. I have a 2 speed jet away but would to convert it to a four speed transmission. How do I find out what the best fit would be. I am looking for a daily driver with a little get up.

MDchanic

A 200R4 would fit best.

A 700R4 would be harder to fit in, and would also be absolutely unnecessary in terms of durability.


You could try the Search function.

- Eric

Olds64

The 2004R should be upgraded to withstand the AWESOME MIGHT of your Rocket motor. I believe a common upgrade to the 2004R is hardened internals.

MDchanic

For a 330?

- Eric

Olds64

It's the MAW concept.

MDchanic

Of course.

- Eric

joe_padavano

The 200-4R is the same overall length as your current Junkaway, er, Jetaway trans. The driveshaft stays the same and the trans bolts directly to your 330.

Two things to keep in mind are 1) the crossmember will need to be moved rearward to the TH400 position and 2) you'll need a TV cable. Since the TH400 wasn't offered on the 1965 cars, you'll need to drill holes in the lower frame rail for this new location. Later cars had the holes from the factory for the optional TH400. Moving the crossmember also means that the e-brake cables are different, since they hang off the crossmember. Get the front and intermediate cables for a 1967 442 with the same body style as yours. Rear cables stay the same. The TV cable is probably easiest if you use an aftermarket setup, like Lokar.

Firewalker

And the lockup converter and kit for it. All in all you should love it.

joe_padavano

Especially the first time you test that 2.74:1 first gear off the line, vs the 1.72:1 first gear in your current trans.

Firewalker

He may need to put a note on the dash, to himself, to not try and hold it in low until 90

I was thinking how smooth, and fast the shifts can be just cruising around, and it is a very quiet tranny. The noise level at higher speeds will be much lower and quieter than what he is use to as well. It will be like a new car to them.

matt69olds

Any 2004R built after 1984 alreqdy has all the factory hardened internals. For that matter, the 2004R in grandma's Cadillac is identical the the trans in a Buick Grans National, with the exception of the valve body, govenor, and servo. In other words, if the trans is in good mechanical condition, a good shift kit is probably all it needs to live behind a stout small block. Make sure the TV cable is adjusted right (close is not good enough!) And enjoy the best of both worlds, the added acceleration of the lower gear,(tje car is going to feel lime you added 75 horsepower) and the added fuel economy and comfort of the overdrive.

olds 307 and 403

Hardened pump rings, stiffer spring, hardened stator and the big Transgo shift kit should do it. Over fill it a quart or buy the Hughes deep pan which now comes with the bottom feed 700R4 filter. The stock fiter sucks from the top, a poor design for hard launches.

jjpape

Thanks guys...ordered the 200r-4 yesterday with the lokar shifter. Do I need to order a new yoke as well?

Firewalker

If the jetaway is the same yoke as the powerglide, then I would say not unless it looks worn on the seal area.

joe_padavano

With the exception of the TH400 and the M22, every other RWD GM trans uses the same yoke size.

MDchanic

M21 as well, no (only difference between 21 and 22 being the gear tooth angle, I'd believed)?

- Eric

joe_padavano

I'm pretty sure only the M22 used the larger TH400 yoke and output shaft.

MDchanic

Now I've got to go find out - I recall he M21 in the Chevelle I had as a kid having a TH400 yoke - I know because when I swapped in a T-10, I had to change the yoke... Or at least I think that's what I remember.

- Eric

TexasT

Check out www.tvmadeez.com and be sure to get that tv cable installed and adjusted correctly. VERY IMPORTANT!

Also http://www.tvmadeez.com/article/index.php

d2_willys

His current Jetaway is a switch pitch type. So he may not see as much difference than one may think.