Check for faulty tq converter

[Hypr5]

Hey guys,

Can anybody give any advice on checking to see if my torque converter is faulty???

[ArtemLepilov]

do a stall test. Park the car on a level ground, put the parking break on, put the car in drive and rev the engine. It should stall at around 2000RPM I think - form what I remember form the Bentley. Anyone got more info on that? I dont have a bently nearby.

-Artem

[Hypr5]

do a stall test. Park the car on a level ground, put the parking break on, put the car in drive and rev the engine. It should stall at around 2000RPM I think - form what I remember form the Bentley. Anyone got more info on that? I dont have a bently nearby.

-Artem

I tried this a while back, but the tires started spinning so I wasn't able to get an accurate reading. Thanks.

[genphreak]

I tried this a while back, but the tires started spinning so I wasn't able to get an accurate reading. Thanks.

Sounds like a great way to break engine & trans mounts to me. Maybe new its ok, but a 15 year old old car may not take the strain. It might even break a centre bearing and/or guibo

Something might give, perhaps even the tranny, especially if the torque converter is faulty and locks in a weird way (like somewhere beyond 2000rpm, if it can do so)...

[Alexlind123]

do a stall test. Park the car on a level ground, put the parking break on, put the car in drive and rev the engine. It should stall at around 2000RPM I think - form what I remember form the Bentley. Anyone got more info on that? I dont have a bently nearby.

-Artem

Yep, thats what the bently says. If you have the parking brake fully applied and your foot firmly on the brake, spinning tires shouldnt be a problem.

[Hypr5]

Hah, yeah... the trans was bad at the time I performed the test, I didn't think about the guibo, etc - but it had a minor shake before that anyhow. What's ridiculous is that the car spun the tires. I didn't think a 525 could do that - under any circumstance. lol.

And be nice to her, she's only 11, not 15! haha.

[genphreak]

Hah, yeah... the trans was bad at the time I performed the test, I didn't think about the guibo, etc - but it had a minor shake before that anyhow. What's ridiculous is that the car spun the tires. I didn't think a 525 could do that - under any circumstance. lol.

And be nice to her, she's only 11, not 15! haha.

Awww well I hope she doesn't take offence, my old girl is 17... . It'll spin the tires as the front brakes get the majority of the hydraulic pressure. If you had a lot more pressure on the pedal it would have stopped the rears spininng and made the torque converter take full power.

[laguner]

Bentley also states that you should not do this for more than 10 seconds or serious damage may occur. The stall speed will vary by model.

[632 Regal]

Brake torques are cool, actually if everything isnt worn out it wont cause any problems. I couldnt even fathom a torqe longer than 5 seconds.

Also if the engine is running shitty it wont come near the stall rpms.