Ugh, Cant Take It Anymore! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

c10scotty · 05-06-2003, 10:31 PM

alright, i have a th350c tranny and the damn lockup converter kicks in at like 26mph, then if i give it any gas it will downshift again....long story short, its a big pain in the ass.

so how do i disconnect the damn thing? isnt there a wire or something??

also, i was thinkin about maybe wiring up a toggle switch to make it work, so it would be in third with the switch off and 4th with it on. would that work?? how would i go about doing it??

apstguy · 05-07-2003, 12:40 AM

Correct me if I'm wrong (I ocassionally am) but TH350 don't have overdrive and therefore don't have a lock up.

79BIG10 · 05-07-2003, 02:02 AM

Quote:

Originally posted by apstguy
Correct me if I'm wrong (I ocassionally am) but TH350 don't have overdrive and therefore don't have a lock up.

You are correct that a TH350 does not have a OD but the later models came with a lock up converter. These are TH350C models.

*racedvl* · 05-07-2003, 08:07 AM

79BIG10 is correct. There was a lock up converter TH350.

LOHRTBT · 05-07-2003, 01:34 PM

My old th350 had an electronic lockup

Marks 85 · 05-07-2003, 02:05 PM

Quote:

Originally posted by c10scotty
alright, i have a th350c tranny and the damn lockup converter kicks in at like 26mph, then if i give it any gas it will downshift again....long story short, its a big pain in the ass.

so how do i disconnect the damn thing? isnt there a wire or something??

also, i was thinkin about maybe wiring up a toggle switch to make it work, so it would be in third with the switch off and 4th with it on. would that work?? how would i go about doing it??

Mine just started doing that a couple of weeks ago, I thought the tranny was going....
Is there a fix to this problem?

c10scotty · 05-07-2003, 08:08 PM

well ive heard before that there is a spring in there that activates it, and if you are getting your tranny rebuilt then you can get a stiffer spring to put in there so that it shifts at a higher point than the old worn out spring...this is not an option for me YET though becuase i dont plan on rebuilding my tranny till i get a new motor and that is gonna be a while.

ive also heard that oyu can disconnect the lockup altogether just by cutting one wire, i dont know if that is true though...but my idea was that if there was a wire that controlled it then i could put a switch to it to turn it off and on. i would do this becuase i like being 1:1 when cruising on the highway, but i hate when it comes on and off all the frickin time in town.

and btw, a th350 doesnt have a lockup converter, but a th350c does.

MylilBowTie · 05-07-2003, 08:53 PM

I wouldn't unplug it unless you want to rebuild it pretty soon. I thought I could get away with doing that and it burnt mine up in no time at all lasted maybe a month. This was because the connector that goes into the transmission was broken and I thought I didn't need it "that" bad so I didn't plug it in. I was already broken so there wasn't any sense in plugging it in. That's just been my personal experience with it. TH-350 are also a little stronger than a TH-350(C).

**Captkaos** · 05-08-2003, 10:32 AM

A buddy of mine put a switch in his so he could lock the converter when he wanted to and leave it unlock normally.

Marks 85 · 05-08-2003, 01:05 PM

Quote:

Originally posted by Captkaos
A buddy of mine put a switch in his so he could lock the converter when he wanted to and leave it unlock normally.

Can you tell us how he did it? I dont want to put a tranny in it now, I am savin for a 700 r4.

PHOENIX · 05-08-2003, 01:13 PM

This one works by vehicle speed:
http://www.jegs.com/cgi-bin/ncommerc...20&prmenbr=361
Here is a kit by painless (vacuum?):
http://www.jegs.com/cgi-bin/ncommerc...22&prmenbr=361
Here is another:
http://www.jegs.com/cgi-bin/ncommerc...06&prmenbr=361

I didnt really check them out, but thats what I found at www.jegs.com
Maybe one of those will help.

c10scotty · 05-08-2003, 10:53 PM

pheonix,

thanks for the links man, never thought about lookin to see if anyone already made this stuff...the first link is the only one for a 350 though and its pretty pricey but thats what i want...and will have someday. thanks again. guess for now i will just have to deal with it cuz i dont want to risk blowing my tranny, cant afford that

05-06-2003, 10:31 PM	#1
c10scotty ~THE SILVER BULLET~ Join Date: Oct 2002 Location: WYOMING Posts: 285	Ugh, Cant Take It Anymore! alright, i have a th350c tranny and the damn lockup converter kicks in at like 26mph, then if i give it any gas it will downshift again....long story short, its a big pain in the ass. so how do i disconnect the damn thing? isnt there a wire or something?? also, i was thinkin about maybe wiring up a toggle switch to make it work, so it would be in third with the switch off and 4th with it on. would that work?? how would i go about doing it?? __________________ ~1980 c10 chevy scottsdale~ ~2.5/4 drop 305/th350c~

05-07-2003, 12:40 AM	#2
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	Correct me if I'm wrong (I ocassionally am) but TH350 don't have overdrive and therefore don't have a lock up. __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

05-07-2003, 01:34 PM	#5
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	My old th350 had an electronic lockup __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

05-07-2003, 08:08 PM	#7
c10scotty ~THE SILVER BULLET~ Join Date: Oct 2002 Location: WYOMING Posts: 285	well ive heard before that there is a spring in there that activates it, and if you are getting your tranny rebuilt then you can get a stiffer spring to put in there so that it shifts at a higher point than the old worn out spring...this is not an option for me YET though becuase i dont plan on rebuilding my tranny till i get a new motor and that is gonna be a while. ive also heard that oyu can disconnect the lockup altogether just by cutting one wire, i dont know if that is true though...but my idea was that if there was a wire that controlled it then i could put a switch to it to turn it off and on. i would do this becuase i like being 1:1 when cruising on the highway, but i hate when it comes on and off all the frickin time in town. and btw, a th350 doesnt have a lockup converter, but a th350c does. __________________ ~1980 c10 chevy scottsdale~ ~2.5/4 drop 305/th350c~

05-07-2003, 08:53 PM	#8
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	I wouldn't unplug it unless you want to rebuild it pretty soon. I thought I could get away with doing that and it burnt mine up in no time at all lasted maybe a month. This was because the connector that goes into the transmission was broken and I thought I didn't need it "that" bad so I didn't plug it in. I was already broken so there wasn't any sense in plugging it in. That's just been my personal experience with it. TH-350 are also a little stronger than a TH-350(C). __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

05-07-2003, 08:07 AM	#4
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	79BIG10 is correct. There was a lock up converter TH350.

05-08-2003, 10:32 AM	#9
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	A buddy of mine put a switch in his so he could lock the converter when he wanted to and leave it unlock normally. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

05-08-2003, 01:13 PM	#11
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	This one works by vehicle speed: http://www.jegs.com/cgi-bin/ncommerc...20&prmenbr=361 Here is a kit by painless (vacuum?): http://www.jegs.com/cgi-bin/ncommerc...22&prmenbr=361 Here is another: http://www.jegs.com/cgi-bin/ncommerc...06&prmenbr=361 I didnt really check them out, but thats what I found at www.jegs.com Maybe one of those will help. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION * Last edited by PHOENIX; 05-08-2003 at 01:16 PM.

05-08-2003, 10:53 PM	#12
c10scotty ~THE SILVER BULLET~ Join Date: Oct 2002 Location: WYOMING Posts: 285	pheonix, thanks for the links man, never thought about lookin to see if anyone already made this stuff...the first link is the only one for a 350 though and its pretty pricey but thats what i want...and will have someday. thanks again. guess for now i will just have to deal with it cuz i dont want to risk blowing my tranny, cant afford that __________________ ~1980 c10 chevy scottsdale~ ~2.5/4 drop 305/th350c~

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