From the Ottomatic Facebook Page:
Here are some of the more common choices for repairing your car’s transmission, and some of the pros and cons for each one.
New Transmission
In general, there’s no such thing as a “new” transmission… at least, not one that you can buy. The only new transmissions are those on the assembly line, going into new cars.
The transmissions that many people call new are actually remanufactured. These are transmissions that failed and have been rebuilt to factory specifications. Basically they’re the same as any other rebuilt or remanufactured transmission.
Why is this distinction important? Because when you’re comparing pricing, you want to compare apples to apples. You might assume a new transmission is better than a rebuilt one so it’s worth more. But since there’s really no such thing as a new transmission available, there’s no point in paying more for a transmission simply because someone is calling new.
Rebuilt Transmission
When we say a transmission has been rebuilt, we’re generally talking about having a transmission specialist fix your car’s transmission, as opposed to installing a different transmission (that’s called a reman).
The technician removes your car’s transmission and takes it apart, down to nuts and bolts. Then he cleans and examines each component. He discards and replaces all the components that are supposed to wear, such as clutches and bands.
He examines any metal parts and replaces any worn or damaged components. And he performs any updates to bring your transmission to like-new condition. Finally, he reassembles the whole thing, installing new gaskets and seals.
What you end up with is a transmission that’s effectively new; better than new, in fact, thanks to the updates installed. Rebuilds and remans are generally the most expensive types of repairs.
Other names for this service include refurbished, reconditioned, or overhauled. These are all just different ways to say rebuilt.
Remanufactured Transmission
Generally, a remanufactured transmission — or “reman” — is the same as a rebuilt transmission, except the transmission was rebuilt in a factory setting instead of the repair shop. And the reman transmission is usually taken from a different vehicle, rebuilt, and installed in your car, as opposed to rebuilding the one that came with your car.
There’s nothing wrong with using a reman transmission; the rebuild process is pretty much the same as any other rebuild. The problem comes in if the reman failed in an unusual manner; one that the technician might overlook, such as a slightly porous case.
Since the technician never diagnosed the transmission while it was in the car, he has no way of identifying the root cause of the failure. In that situation, buying a reman could leave you with someone else’s problems.
The advantage of a reman is that there are generally no surprises; the price is the price, and it won’t go up if the shop discovers additional damage during disassembly. The downside is you’re going to pay for those additional repairs, whether your transmission needed them or not.
Repaired Transmission
Maybe your transmission doesn’t have a lot of miles on it. Or maybe everything looks okay, except for one component that broke or failed. In that case a targeted repair might be just the ticket.
With a targeted repair, the technician repairs or replaces one specific component or system. For example, if the input shaft snapped or a solenoid failed, those parts can be replaced without rebuilding the entire transmission.
Another type of repair is a reseal; that’s where the transmission was leaking, but the internal components are still in good shape. In that case the technician replaces the seals and gaskets to correct the leaks, which buys you more life from the rest of the transmission.
Repairs generally cost less than a rebuild or a reman, but they carry an element of risk. After a repair, the shop will only warrant the components or systems they repaired. And generally that warranty will be shorter than you might expect with a complete rebuild.
Used Transmission
Another possibility today is to have a used transmission installed. Used transmissions have become a viable option because insurance companies are often totaling cars simply because the airbags deployed. The rest of the car may be in terrific condition, with very low mileage.
A used transmission may cost hundreds less than a rebuild. On the other hand, most shops won’t offer the same type of warranty on a used transmission, so there is a trade-off.
Keep in mind that not every option may be practical for you. A lot depends on the type of car you have, the mileage, the type of failure, and more.