1979 Oldsmobile Cutlass Supreme Engine and Transmission Swapping?

Asked by kincaidhollow Apr 18, 2015 at 06:04 PM about the 1979 Oldsmobile Cutlass

Question type: General

I have a 1979 Oldsmobile Cutlass Supreme with a 4.3L 260 V8 Engine. I was wondering what kind/size of transmission did they install with the 260 engine?
Also if I change to a 350 engine what kind/size of transmission would I need and would I need to change anything else other then the transmission like Drive-Shaft, Differential, etc.?

6 Answers

17,815

A 350 engine will use a 350 or 400 trans. The trans cross member may have to be readjusted and the motor mounts will have be swapped out. The drive shaft might work, you'll have to do some measuring.

1 people found this helpful.
Best Answer Mark helpful

That answers a few of my questions but what about my differential there in the back. Will I have to have that swapped as well?

I dont intend on playing hard with it. Just trying to restore and bring the car back to life. Figured a new or reman. engine and transmission couldnt hurt just wasnt sure of everything else Id have to change as well if I was to throw in a different engine and transmission.

A TH350 with the BOP bolt pattern will fit without modifications, the TH200M was the original transmission installed with this engine

A TH400 would be the best choice for a transmission but if you are restoring the car and not hot rodding it why don't you keep it original? If you want more power the stock engine could be upgraded without a lot of trouble.

1 people found this helpful.

Your Answer:

Cutlass

Looking for a Used Cutlass in your area?

CarGurus has 1 nationwide Cutlass listings and the tools to find you a great deal.

Postal Code:

CarGurus Experts

  • #1
    bluRAYwhale
    Reputation
    230
  • #1
    James Sparrow
    Reputation
    230
  • #3
    Gene Arnett
    Reputation
    140
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Dodge Charger
39 Great Deals out of 645 listings starting at $4,888
Used Dodge Challenger
28 Great Deals out of 477 listings starting at $7,999
Used Chevrolet Monte Carlo
7 listings starting at $3,000
Used Ford Mustang
65 Great Deals out of 1,258 listings starting at $4,995
Used Buick Regal
5 Great Deals out of 35 listings starting at $5,600
Used Pontiac Firebird
15 listings
Used Chevrolet Camaro
16 Great Deals out of 307 listings starting at $9,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.