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~

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.