ABS Problem!

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Spacemartin
I am merely driving my van
I am merely driving my van
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ABS Problem!

Post by Spacemartin »

Hi all,
I wonder if you guys could give me a hint how to solve my problem:

I have a 1995 Astrovan with a W-engine and 40L60E trans.
When I am driving down the road and I just slightly touch the brake pedal, the ABS pump starts working, making this brrrrrr-sound. This does not happen all the time, but once in a while.
Sometimes, when I am driving on the highway at 55 miles, the needle of my speedometer is starting to tremble and shortly after that the autotrans is loosing the gear or fails to shift.
OBD-I gives me troublecode 37.
So far I have replaced the front wheel ABS sensors and the Vehicle Speed Sensor.

Do you you have any idea, what could be the reason for this malfunction?

Thank you and kind regards
Martin
1995 Astro CS
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LaGrasta
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Re: ABS Problem!

Post by LaGrasta »

yes, ME TOO! Anyone have any ideas?
1998 Astro, 246,000 miles

K&N air filter
TruCool trans cooler
2" Overland lift & 15" BFG Terrain, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Gabriel Ultra shocks, rear AirLift bags & sway bar
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box

Captn. Crunch
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Re: ABS Problem!

Post by Captn. Crunch »

Torque Converter Clutch Brake Switch Circuit Error

The ECM monitors the Torque Converter Clutch Brake switch to determine if the brakes are applied or not. It uses this signal to help determine if the the Torque Converter Clutch should be applied.
Fault Code Description
37 - Torque Converter Clutch Brake switch circuit error
Symptoms
Torque Converter Clutch Brake switch will not come on or operates erratically
Common Problems
Faulty or out of adjustment Torque Converter Clutch brake switch
Captn. Crunch
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Wiley
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Re: ABS Problem!

Post by Wiley »

Maybe something related to your EBCM module which is on your frame under drivers seat more or less,I am no expert though, just something to look into if other paths lead to a dead end.

Is that what you are talking about Capt'n, maybe I missed it, that's a bit over my head.
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Re: ABS Problem!

Post by Captn. Crunch »

I’d start by looking at the two switches under your brake pedal. One is for the brake light and the other is for torque converter lock up

http://www.astrosafari.com/viewtopic.php?p=52804
Captn. Crunch
"I don't beat my rig-I use it to it's maximum potential"
1994 Safari conversion (sold) and miss'n it!
1999 Safari SLE AWD junked
2003 GMC Safari AWD SLT
cast iron Torsen equipped front diff
S-10 leafs-G80 rear w/3.73’s
2” body lift w/Falken Wildpeak AT’s
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