th350 converter lockup - The 1947 - Present Chevrolet & GMC Truck Message Board Network

3r!c84 · 04-22-2010, 03:26 PM

hey i got a 84c10 with a 305/th350 combo

how can i check and see if my lockup converter is doing its job?
it dont feel like its locking up at all?

under acceleration at like 3000rpm im doing like 85
but when im just at highway speeds at 3000rpm im only doing 70

Slonaker · 04-22-2010, 03:49 PM

The lockup on mine feels like a third shift, but with a small decrease in RPM.

Slonaker

3r!c84 · 04-22-2010, 04:59 PM

yeah i dont feel nothing like that

qu1cks1lver56 · 04-22-2010, 08:26 PM

mine doesnt feel like a shift at all, but it seems like it dropped 200 rpm @ 70.

3r!c84 · 04-22-2010, 08:29 PM

i dont see and feel anything.i keep my eye on the tach..is there a senser i can check or somthing?!

qu1cks1lver56 · 04-22-2010, 08:42 PM

vacuum switch on the firewall.

3r!c84 · 04-22-2010, 08:45 PM

where at on the fire wall and how would i test it

3r!c84 · 04-23-2010, 05:52 PM

anyone?

Jonboy · 04-23-2010, 06:18 PM

Tap your brakes when you are at cruising speed (over 45 MPH). You should feel it unlock, and re- lock up. There should be about 200 RPM or so difference.

qu1cks1lver56 · 04-23-2010, 06:29 PM

It's over the brake booster.

3r!c84 · 04-24-2010, 12:17 AM

ok ill try that tomorrow and let u guys know

04-22-2010, 03:26 PM	#1
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	th350 converter lockup hey i got a 84c10 with a 305/th350 combo how can i check and see if my lockup converter is doing its job? it dont feel like its locking up at all? under acceleration at like 3000rpm im doing like 85 but when im just at highway speeds at 3000rpm im only doing 70 __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

04-22-2010, 03:49 PM	#2
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: th350 converter lockup The lockup on mine feels like a third shift, but with a small decrease in RPM. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

04-22-2010, 04:59 PM	#3
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: th350 converter lockup yeah i dont feel nothing like that __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

04-22-2010, 08:26 PM	#4
qu1cks1lver56 Registered User Join Date: Dec 2009 Location: Milton, FL Posts: 733	Re: th350 converter lockup mine doesnt feel like a shift at all, but it seems like it dropped 200 rpm @ 70. __________________ My 86 http://67-72chevytrucks.com/vboard/s...d.php?t=375526

04-22-2010, 08:29 PM	#5
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: th350 converter lockup i dont see and feel anything.i keep my eye on the tach..is there a senser i can check or somthing?! __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

04-22-2010, 08:42 PM	#6
qu1cks1lver56 Registered User Join Date: Dec 2009 Location: Milton, FL Posts: 733	Re: th350 converter lockup vacuum switch on the firewall. __________________ My 86 http://67-72chevytrucks.com/vboard/s...d.php?t=375526

04-22-2010, 08:45 PM	#7
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: th350 converter lockup where at on the fire wall and how would i test it __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

04-23-2010, 05:52 PM	#8
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: th350 converter lockup anyone? __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

04-23-2010, 06:18 PM	#9
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: th350 converter lockup Tap your brakes when you are at cruising speed (over 45 MPH). You should feel it unlock, and re- lock up. There should be about 200 RPM or so difference. __________________ 1974 Jimmy- 5.3/4L80e/NP241

04-23-2010, 06:29 PM	#10
qu1cks1lver56 Registered User Join Date: Dec 2009 Location: Milton, FL Posts: 733	Re: th350 converter lockup It's over the brake booster. __________________ My 86 http://67-72chevytrucks.com/vboard/s...d.php?t=375526

04-24-2010, 12:17 AM	#11
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: th350 converter lockup ok ill try that tomorrow and let u guys know __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

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