Torque Converter
Puller Guide

Nine times out of ten a torque converter slides off the input shaft with two hands and a little wiggle. The tenth one does not move, and that is the job that ends with a scored hub, a chewed pump bushing, and a leak two weeks after the customer picks the vehicle up.

A converter is held in place by three separate engagements stacked on top of each other: the turbine splines on the input shaft, the stator support splines, and the pump drive on the very back of the hub. When a unit has sat, or when the converter has been running hot enough to varnish, all three of those can lock up with lacquer. That is when you need a puller instead of a grip.

Why Converters Hang Up On The Pump Hub

The hub is the machined snout on the back of the converter. It does two jobs: it rides inside the pump bushing, and its outer diameter is the sealing surface for the pump seal. That means the hub is a bearing journal and a seal journal at the same time, and both of them are 0.001-inch-tolerance surfaces you can ruin with a screwdriver in about a second.

Common reasons a converter will not come off:

• Varnish on the stator splines. Burnt fluid turns to lacquer. The splines are still there, they are just glued.
• Rust on the hub OD. Any unit that has sat outside with the bell housing open. Surface rust between the hub and the bushing bore locks it solid.
• The converter is cocked. If the trans dropped a half inch on the jack, the converter has already tipped and the hub is binding against the bushing.
• Pump drive tang interference. On a hub with flats or tangs, the pump rotor stays engaged until the converter has moved back nearly an inch. If you pull at an angle before it clears, the tang catches.
• The converter never came off the flexplate. Missed a bolt or a nut. Check before you assume it is stuck.

That last one is worth repeating. Before you pull on anything, count the fasteners. GM units typically use three bolts through the flexplate into the converter pads (six on some heavy-duty applications), Ford uses four studs and nuts through the flexplate on most rear-drive automatics, and Chrysler bolt-through applications use four bolts. Miss one and you will fight a converter that is still fastened to the engine.

The Four Tool Styles — And What Each One Is Actually For

1. Slide-Hammer Puller With A Converter Hook

This is the real "converter puller." A slide hammer with a threaded end that accepts a hooked adapter or a flat bar. You reach through the converter's drain-back opening or hook the leading edge of the hub's inner lip, then rap the weight back. The shock load breaks varnish loose without steady side load on the bushing.

What matters when you buy one: hammer weight (3 lb minimum, 5 lb is better), shaft length (a longer stroke does more work per hit), and whether the kit includes the internal hook adapters. A generic 5-lb slide hammer set with a full adapter tray covers converters, axle seals, and pilot bearings, which is why it is the one to own.

Browse torque converter slide-hammer pullers

2. Jaw / Hook Pullers

Two- and three-jaw pullers grip the outer rim of the converter shell and push off the end of the input shaft. They work, but they carry a real risk: the converter shell is thin stamped steel, and a jaw pulled down hard on the weld seam will dent or crack it. If you use a jaw puller, hook the jaws on the mounting lugs or the pad bosses, never on bare shell.

Never, ever set jaws on the hub itself. One clamp mark on that OD and the new pump seal will weep from day one.

Check heavy-duty jaw puller sets

3. Torque Converter Handles

A bent steel bar, usually with two hooked legs, that drops into the converter's center opening and gives you a handle. It is not a puller in the mechanical-advantage sense — it is a way to carry 40 pounds of spinning steel and fluid without dropping it on your chest or hooking your fingers over the hub.

Cheap and worth having. A 12-inch converter with fluid still in it runs roughly 35 to 55 pounds depending on the unit, and it is all awkward, off-center weight. Most hub damage does not happen during the pull, it happens when someone loses their grip and the hub hits the floor.

Check converter handles

4. Converter Holding Clamps / Retaining Straps

The other half of the problem. Once you have the trans unbolted, you want the converter to stay with the transmission, not slide off and dump three quarts on the floor while the unit is on the jack. A retaining strap or C-clamp style holder bolts to the bell housing face and traps the converter until you are on the bench.

A $15 clamp saves you a $200 cleanup and keeps the converter from cocking and gouging the bushing while it hangs.

Check converter holding clamps

Fitment — GM vs Ford vs Dodge

There is no such thing as a universal converter puller adapter, because the three domestic families do not attach the same way. Match the tool to what your converter actually gives you to grab.

The one number that matters on every one of them: after the converter is fully seated, there must be measurable clearance between the converter mounting pads and the flexplate before you draw the bolts up. On most rear-drive domestics that is roughly 1/8 inch. If the pads are already touching the flexplate when the bell housing is bolted flush, the converter is not seated, and running it that way will push the pump apart from the inside. Pull it back out and re-engage it.

Safe Removal Procedure

• Drain what you can first. Pull the pan or the converter drain plug if it has one. Less weight, less mess, and a lighter converter is far less likely to tip and gouge the bushing.
• Confirm every flexplate fastener is out. Rotate the crank with a socket on the balancer and count them off. Do not pull against a bolt.
• Support the tail and the bell housing. The trans has to come straight back off the dowel pins. Any downward tilt puts the converter's full weight on the pump bushing bore edge.
• Pull straight, not at an angle. The converter has to travel back roughly three quarters of an inch to an inch before the pump drive clears. Angle it before that and you cam the hub into the bushing.
• If it will not move, shock it — do not lever it. Slide hammer, several sharp raps, rotate the converter 90 degrees, repeat. Steady prying with a bar just transfers force into the bushing bore.
• Inspect the hub the moment it is off. Run a fingernail across the seal track. If you can feel a groove or a nick, the converter needs a new hub or replacement — a new pump seal will not fix a scored journal.
• Check the bushing before it goes back together. Copper showing through, an oval bore, or visible scoring means a new pump bushing. This is the single most-skipped step in a driveway converter swap, and it is why so many jobs leak afterward.

If the pump itself feels rough or you find bushing material in the pan, read our writeups on 4L60E pump failure symptoms and ballooned torque converter causes before you reuse anything.

Reinstallation — Where Most Damage Actually Happens

More pump bushings die going in than coming out. On the way in, the converter is full of nothing, the hub is dry, and it is easy to hang it on the stator splines and force it. Pre-fill the converter with a quart or two of the correct fluid, coat the hub OD and the pilot with assembly lube or clean ATF, and turn the converter while you push. You are feeling for engagement steps, not pushing until it stops.

Rough count of engagements by family: GM gives you two solid clunks (turbine splines, then pump drive) plus a stator step you can feel as resistance; Ford gives you three distinct drops on most units; Chrysler gives you three. Then spin the converter by hand — it should turn freely. If it will not spin, it is not seated.

An alignment/installation tool takes the guesswork out of it on the units with deep stator splines. We cover those separately in the torque converter installation alignment tool guide.

Check converter installation tools

FAQ

Do I really need a dedicated converter puller?

For one job on a healthy unit, no — two hands and a wiggle will do it. If you pull transmissions regularly, or you are working on anything that has sat, a 5-lb slide hammer with internal hooks pays for itself the first time a converter refuses to move.

Can I pry the converter off with a big screwdriver?

You can, and people do, and that is exactly how bushings and hub seal surfaces get ruined. If you have to lever, put the fulcrum on the bell housing face and the tip on a converter pad boss — never on the shell seam and never on the hub.

How much does a torque converter weigh?

A 245mm (roughly 9.5-inch) converter runs about 25 to 30 pounds with fluid. A 12-inch truck converter is commonly 40 to 55 pounds wet. That is why the handle exists.

Do I have to replace the pump bushing every time?

Not automatically, but you have to look at it every time. If the hub was scored, if the converter was ballooned, or if you find bronze in the pan, the bushing goes. It is a cheap part and a very expensive comeback.

What about front-wheel-drive transaxles?

Same logic, tighter space. On most transverse units the converter still has to clear the pump drive before it will angle out, and there is usually less room to swing a slide hammer. Get the unit on the bench first when you can.