Transmission swap

[Cobain03]

my transmission is currently leaking from the front seal. i dont know why we didnt replace the seal while we had the engine out but to my question.

i currently have the stock 3 speed auto c4. is there an automatic overdrive (or at least a 4 speed tranny that would bolt right up?

 

[jdowen2]

You probably mean the AOD. You'll need a new driveshaft. I'm not sure if it's a bolt in but someone else here should know for sure.

 

[302 coupe]

the seal only costs about $3, just replace it. It will take you a few hours to do it, but its not hard. IIRC, you're high school kid on a budget. Chances are, a properly executed AOD, T5, or other transmission swap will have your checkbook in the red zone. There's nothing wrong with a C4, they are great so long as you can do without the overdrive.

 

[rbohm]

302coupe has it right. unless you really want an AOD, you are better off replacing the seal. an AOD along with a new flexplate, driveshaft, modified crossmember, etc. is going to run you around $800 or so. that will buy alot of gas, so unless you need to od to cover for some deep rear gears, stay with the C4.

 

[Sicarius428]

Your C4 is stronger than the AOD anyways. The thousand dollars it would cost to change it over can buy you a lot of gas.
Kevin

 

[Cobain03]

im not worried about making more power then the AOD will handle lol. maybe once i get on my feet, i'll do a t-5 swap or something.

i have a seal actually. it came with the rebuild kit lol.

 

[nitequill]

not to steal the show guys... but i have a 351W that i forced into my 65 stang im using a stock 65-66 c4 and i wanted to know would it be a good idea to continue using the stock c4 or move on to something bigger?

 

[rbohm]

not to steal the show guys... but i have a 351W that i forced into my 65 stang im using a stock 65-66 c4 and i wanted to know would it be a good idea to continue using the stock c4 or move on to something bigger?

the C4 fits better than the AOD in the 65-66 cars. if you swap to an AOD you will likely have to massage the trans tunnel with a BFH. unless you are using 3.50 or lower gears, you dont need an overdrive unless you spend alot of time on the highway. in fact for a daily driver, and the 351w, you can use a 2.80 or 3.00 gear and never notice any real difference in performance at the seat of the pants.

 

[Max Power]

I noticed a HUGE difference going from a 2.87 gear to a 3.50 on my 351.