Reaper_18

The other day I was cruising down the freeway at 65 with the cruise control on. All of a sudden the transmission shifted out of overdrive and into drive. So I took the next exit to check things out. I rolled up to a stop sign, and as I started crawl through the intersection. The car lurched back and worth and this horrible noise started. The will moved forward, but only with a grinding noise. I also have no reverse gear anymore. So I'm guessing the transmission went out. I double checked the fluid and it has plenty. So now my question is, should I rebuild the 700R4 or swap in a TH350 or a TH400. What do you guys think will be the cheapest and best thing to do?

Lewspike69

Do you need the overdrive? Do you use the car on the free way a lot? If so I would say rebuild the 700R4.

Reaper_18

Its rarely on the freeway. But I do like having the overdrive option.

Lewspike69

Swapping a TH350 or 400 is going to also require additional mods to the car. I believe they make cross members for this but it's not a straight up swap.

In my opinion, that overdrive makes it worth it if you're not taking it to the strip. I drive my DD truck with a TH350 only city no highway around and wish it had overdrive, especially at the pump lol.

I'd rebuild the 700r4

Reaper_18

Which rebuild kit would be best for it? It still has the stock 305 in front of it.

Lewspike69

Although I'm no expert in anything related to transmissions, I would recommend a mild rebuild kit from Probuilt Automatics. Everyone on this forum seems very happy with the service and products they provide. A mild kit would make that tranny virtually indestructible behind your stock 305. It would shift better too...