305. Swap

[RoxanneThe79’Cutty]

Doing a 305. swap on my 79 cutlass. Having an issue sourcing the right transmission. What is the best transmission that fits the 305? And any ideas on where I can locate one? Rebuild or new?

 

[64nailhead]

Everything fits pretty much - TH350, TH400, 700R4, 200-4R, T56, etc.

Assuming this is a cruiser, if you had a 3 speed in it previously, and you don’t want to get into re-gearing, then stick with a 3 speed and I’d recommend a stockish TH350.

 

[RoxanneThe79’Cutty]

Everything fits pretty much - TH350, TH400, 700R4, 200-4R, T56, etc.

Assuming this is a cruiser, if you had a 3 speed in it previously, and you don’t want to get into re-gearing, then stick with a 3 speed and I’d recommend a stockish TH350.

Okay groovy. I live in Texas and I am having issues finding a TH350, any ideas on where to start looking for one?

 

[64nailhead]

Here’s one. You search a little and they are pretty much $1000 with a warranty.

JEGS 60300: GM TH350 Performance Automatic Transmission for Chevrolet, 2WD [Rated Up to 450 HP] - JEGS

Order a TH350 transmission kit at JEGS High Performance. Our trusted TH350 performance transmission kits include a TH350 transmission, a transmission-to-block bolt set, and a flexible braided transmission dipstick. For an all-in-one transmission upgrade solution, buy your TH350 transmission kit...

www.jegs.com

 

[565bbchevy]

I would be looking for an overdrive trans if I am starting from scratch.

 

[1320John$$$]

Lots of transmission to be had if you invest a little time in your search
Start with your local transmission shops

 

[olds307 and 403]

What motor and trans was in the car previously?

 

[RoxanneThe79’Cutty]

What motor and trans was in the car previously?

Currently has a 260 rocket. Not sure on the trans.

 

[565bbchevy]

Currently has a 260 rocket. Not sure on the trans.

Just a 260 , definitely not a rocket

 

[olds307 and 403]

An Olds 307, 350 or 403 is a direct swap. It was probably a TH200, which is weak junk. A TH350, a direct swap or TH2004R with frame extensions, otherwise is a direct swap.